Entries |
Document | Title | Date |
20080204957 | Current Driver Circuit and Method of Operation Therefor - A current driver circuit comprises circuitry having a current adjustment function and operably coupled to a current driver for providing a current to a current consuming device. The circuitry comprises or is operably coupled to a function arranged to determine a current level being drawn by the current consuming device. The current adjustment function varies an over-load limit applied to the current driver in response to a variation in the determined current level. | 08-28-2008 |
20080204958 | Back-current protection circuit - A current-limiting switch circuit including a first power semiconductor switch, at least one sense semiconductor switch configured to share a common-gate and a common drain with the first power semiconductor switch, and a second power semiconductor switch serially connected to the first power semiconductor switch and sharing a common node therebetween. The first power semiconductor switch, the first sense semiconductor switch, and the second power semiconductor switch are configured to limit at least a back current. | 08-28-2008 |
20080253051 | Switched Hot Swap Controller - The invention describes an electric circuit ( | 10-16-2008 |
20080285198 | Over-current protection circuit - An over-current protection circuit for use with a constant voltage circuit that converts an input voltage to a predetermined output voltage and that outputs the predetermined output voltage. The over-current protection circuit includes an output current detecting circuit configured to output an output current detecting voltage proportional to an output current outputted from the constant voltage circuit; an output current control circuit configured to control the output current outputted from the constant voltage circuit according to the output current detecting voltage outputted from the output current detecting circuit; an output voltage detecting circuit configured to output at least an output voltage detecting voltage according to the output voltage of the constant voltage circuit; and a conversion rate altering circuit configured to alter a conversion rate of the output current to the output current detecting voltage of the output current detecting circuit according to the output voltage detecting voltage outputted from the output voltage detecting circuit. | 11-20-2008 |
20080310069 | Systems and Methods for Distributed Series Compensation of Power Lines Using Passive Devices - Systems and methods for implementing line overload control via providing distributed series impedance are disclosed. One system, amongst others, comprises at least one distributed series reactor (DSR). Each DSR comprises a single turn transformer (SST) comprising two split-core sections ( | 12-18-2008 |
20080316667 | Electronic system and cell module thereof - An electronic system and a cell module thereof are provided. The electronic system includes an electronic device and a cell module. The cell module includes a cell, a discharge switching circuit, and a surge current suppressed and controlled circuit. The discharge switching circuit is coupled to the cell. The surge current suppressed and controlled circuit is used for controlling the discharge switching circuit, so that the current flowing from the cell into the electronic device gradually increases by the discharge switching circuit when the electronic device is coupled to the discharge switching circuit. | 12-25-2008 |
20090040677 | Device and method of reducing inrush current - This disclosure provides a method and apparatus for reducing an inrush current inflowing from an external power source during an initial transient state. The method may include generating a first signal based on a level of internal voltage. The first signal may linearly increase or decrease, wherein the slope of the first signal may be fixed. The method may further include comparing the first signal with the reference voltage, and controlling an overcurrent prevention function based on the comparison results. An inrush current reducing device may include a reference voltage generating unit configured to compare a first signal and the reference voltage to control an overcurrent sensing gain, a gain unit configured to compare a first signal and the reference voltage to control an overcurrent sensing gain, and an overcurrent prevention signal generating unit configured to control an overcurrent prevention function based on the comparison results. | 02-12-2009 |
20090046404 | Overcurrent limitation and output short-circuit protection circuit, voltage regulator using overcurrent limitation and output short-circuit protection circuit, and electronic equipment - A disclosed overcurrent protection and output short-circuit protection circuit has a proportional output current generation unit and a first current voltage conversion unit provided in series between a first power supply terminal and an output terminal. Furthermore, the overcurrent protection and output short-circuit protection circuit has a control unit that operates based on a difference between a voltage generated at the first current voltage conversion unit and that generated at a second current voltage conversion unit provided between the first power supply terminal and a second power supply terminal. A current flowing to the second current voltage conversion unit is changed by one or more switching elements in a stepwise manner based on the output voltages of the output transistor when supplying the current, thereby changing the voltages generated at both ends of the second current voltage conversion unit. | 02-19-2009 |
20090052104 | Energy Store System - An energy storage system ( | 02-26-2009 |
20090103222 | OVERCURRENT PROTECTION SYSTEM AND METHOD - An overcurrent protection system and method are disclosed. In one embodiment the overcurrent protection system includes a first switch connected between a supply voltage and an output voltage. A comparator circuit provides a comparator output signal having first and second values that depend on a comparison of the output voltage relative to the supply voltage, the first value indicating an overcurrent condition. A control circuit is coupled to provide a control signal to a control node of the first switch for controlling the first switch in one of first and second operating modes according to the value of the comparator output signal. The control circuit controls the first switch in the first mode to limit the current through the first switch to a level between predetermined upper and lower current levels in response to the comparator output signal having the first value. The control circuit activating the first switch to a normally on condition in the absence of the comparator output signal having the first value. | 04-23-2009 |
20090103223 | POWER CIRCUIT WITH SHORT-CIRCUIT PROTECTION CIRCUIT - A power circuit including a current-limiting semi-conductor switch and a control system connected to the current-limiting semi-conductor switch and configured to bias the semi-conductor switch into conduction and into cut-off. The control system further comprises a short-circuit protection circuit configured to detect and evaluate the voltage drop via the current-limiting semi-conductor switch. | 04-23-2009 |
20090128975 | Integrated Circuit Protected Against Short Circuits and Operating Errors Following the Passage on an Ionizing Radiation - An integrated circuit chip comprising a number of semiconductor components exhibiting parasitic components through which a short-circuit between the circuit supply voltage and ground could occur, wherein said semiconductor components are distributed in elementary blocks, each elementary block being independently connected, for its power supply, to the supply or ground lines of the main supply network of the integrated circuit by a current-limiting device capable of stopping a short-circuit starting in the considered block, and each block being sized so that logic errors occurring in this block are correctable by error-correction means. | 05-21-2009 |
20090147425 | Overcurrent Protection Circuit When Setting Current Using a Package Control Pin - An overcurrent protection circuit for a current setting circuit is disclosed herein that prevents a user-selectable current from exceeding a current limit when an incorrect current selecting component (or current selecting circuit) is connected to an external control pin of a package by the user, or when the control pin is inadvertently grounded. The protection circuit senses a current (A | 06-11-2009 |
20090147426 | Current-limiting circuit with additional current path - A current-limiting circuit ( | 06-11-2009 |
20090154045 | POWER SUPPLY SYSTEM AND METHOD - A power supply system S comprising a power processor | 06-18-2009 |
20090174979 | Current Limiter Having Overload Indication Function - A current limiter includes a circuit device including a power supply transformation circuit to transform a power supply, a detection circuit to detect and transform a load current of a load into an output voltage, a control circuit to interrupt a connection between the power supply and the load according to the output voltage, a reset switch circuit to connect the power supply with the load, and a protection circuit including a warning element. Thus, when the power of the load exceeds a predetermined value, the current limiter will shut the power supply automatically to turn off the load to prevent the load from being worn out due to an excessive load current and to turn on the warning element to inform a user of the overload of the load. | 07-09-2009 |
20090180231 | Overcurrent protection circuit and voltage regulator incorporating same - An overcurrent protection circuit includes a current limiter and a status detector, and a voltage regulator includes an output transistor. The output transistor is configured to regulate a voltage input to an input terminal to output a given constant voltage from an output terminal, while passing a current from the input terminal to the output terminal according to a control signal applied thereto. The current limiter reduces the current passed through the output transistor when the passed current exceeds a given current limit. The status detector is configured to generate a status signal indicating operation of the current limiter. A constant voltage regulator incorporating the overcurrent protection circuit is also disclosed. | 07-16-2009 |
20090195954 | PEAK CURRENT LIMITING APPARATUS - The present disclosure is related to a peak current limiting apparatus of the present disclosure comprising a trigger element serially connected between a power supply source and the load, diverting a fault current to other paths connected in parallel when the fault current exceeding a threshold is generated, a main contact switch serially connected between the trigger element and a load, a driving coil connected in parallel with the trigger element, and generating a repulsive force in response to the fault current to detach a contact point of the main contact switch, and a peak limiting impedance element serially connected between a connection node between the trigger element and the main contact switch and the driving coil, and limiting a first peak level of the fault current flowing through the driving coil to a predetermined level. | 08-06-2009 |
20090201617 | CIRCUIT BREAKER - Disclosed is a current-limiting circuit breaker including first and second mechanical switches connected in series with each other, a first diode, and a first snubber circuit, each connected in parallel across both ends of the first mechanical switch, and a second diode, and a second snubber circuit, each connected in parallel across both ends of the second mechanical switch. | 08-13-2009 |
20090201618 | POWER SUPPLY CIRCUIT, OVERCURRENT PROTECTION CIRCUIT FOR THE SAME, AND ELECTRONIC DEVICE - A power supply circuit includes an output transistor including a source coupled to power supply voltage, and a drain from which output voltage is outputted; a first error amplifier powered by the power supply voltage and outputting a signal based on a potential difference between the output voltage and a reference voltage; a buffer transistor including a gate coupled to the output of the first error amplifier, and a source coupled via a constant current source to the power supply voltage and coupled to a gate of the output transistor; a current detection transistor coupled to the output transistor such that a gate and source are shared; and an overcurrent protection circuit configured to limit the drain current of the buffer transistor based on the increase of the drain current of the current detection transistor and thereby control the output current of the output transistor. | 08-13-2009 |
20090201619 | METHOD AND APPARATUS FOR AN IN-RUSH CURRENT LIMITING CIRCUIT - An in-rush current limiting circuit is disclosed. An apparatus according to aspects of the present invention includes a power switch having a first, second and third terminals. A capacitor having a first terminal and a second terminal is also included. The second terminal of the capacitor is coupled to the first terminal of a current source. The second terminal of the current source is coupled to a second input terminal of the in-rush current limit circuit. A power switch is also included. The first terminal of the power switch is coupled to the anode of a diode. The cathode of the diode is connected to the first terminal of the current source. The second terminal of the power switch is coupled to a second input terminal of the in-rush current limit circuit. The third terminal of the power switch is coupled to be responsive to a voltage across the current source circuit in response to a rate of change of voltage between first and second terminals of the power switch. | 08-13-2009 |
20090207545 | PROTECTION CIRCUIT WITH VARIABLE CURRENT LEVEL LIMITS - A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a current level limiting switch unit which is coupled to between the power supply system and the load to conduct the output power, a detection unit which detects the current value of the output power, a current level setting unit which sets a normal-state current level limit and a transient-state current level limit according to the current value of the output power, a current level setting unit which checks the current value of the output power and controls the current level limiting switch unit to limit the current value and a timer unit. | 08-20-2009 |
20090231772 | CAR CHARGER AND SURGE PROTECTION DEVICE THEREOF - A surge protection device is coupled between a car power source and an output voltage end of a car charger. The surge protection device includes a diode, a current-limiting resistor, and a first transient voltage suppressor (TVS). The diode has an anode coupled to the car power source and a cathode coupled to the car charger. The current-limiting resistor has one end coupled to the anode of the diode. The first TVS is connected to the current-limiting resistor in series, and is connected in parallel with the current-limiting resistor between the car power source and the car charger. A reverse breakdown voltage of the first TVS should be smaller than a reverse breakdown voltage of the diode. | 09-17-2009 |
20090251837 | System and Method for Information Handling System Display Backlight Protection and Monitoring - A current limiting MOSFET monitors power applied to a direct current boost regulator that powers an LED backlight to automatically shut off power to the boost regulator if the current exceeds a predetermined amount. An embedded controller interfaces with the current limiting MOSFET for normal control of operation of the boost regulator by turning the MOSFET on and off. An overcurrent alert is communicated from the MOSFET to the embedded controller if the current exceeds the predetermined amount so that the embedded controller shuts off power to the boost regulator and indicates the failure to an end user. | 10-08-2009 |
20090273874 | POWER SWITCH CIRCUIT EXHIBITING OVER CURRENT AND SHORT CIRCUIT PROTECTION AND METHOD FOR LIMITING THE OUTPUT CURRENT THEREOF - A power switch circuit exhibiting over current and short circuit protections comprises a power-driving unit, a sense unit and a feedback controller circuit. The power-driving unit provides power to a load circuit from a power supply. The sense unit senses the output current of the power-driving unit. The feedback controller circuit controls the power-driving unit and the sense unit. When the output current of the power-driving unit exceeds a threshold, the output current is limited to an over current protection current level. When the resistance of the load circuit is approximately zero, the output current of the power-driving unit is limited to a short circuit protection current level. | 11-05-2009 |
20090273875 | Apparatus for decreasing inrush current using SFCL and method for deciding optimal insertion resistance - There is provided an apparatus for decreasing an inrush current which comprises a power system including a transformer, and a superconducting fault current limiter electrically connected to the transformer. A resistance value of the superconducting fault current limiter is calculated by using a variation of the inrush current and a variation of the voltage drop of the power system according to a value of insertion resistance. | 11-05-2009 |
20090290276 | OVERVOLTAGE PROTECTION DEVICE FOR AN ELECTRICAL CIRCUIT - The invention relates to an overvoltage protection device ( | 11-26-2009 |
20090310271 | OVERCURRENT BREAKING CONTROLLER FOR LAMPS AND LANTERNS - An overcurrent breaking controller for a lamp and lantern is connected in series between AC power and a load and mainly comprises a current transformer connected to the AC power, an overcurrent restraint unit connected to the other terminal of current transformer, and a trigger control unit connected to the overcurrent restraint unit. The overcurrent restraint unit further comprises a phase delay unit and a time setting unit and thus may flicker or cut the power to give a warning signal to a user for achievement of energy conservation and for prevention of energy waste. | 12-17-2009 |
20100027180 | ELECTRONIC CIRCUIT BREAKER APPARATUS AND SYSTEMS - Electronic circuit breakers and systems for isolating a load from a power-supply unit are provided. One electronic circuit breaker includes a current sensor, a switching element coupled to the current sensor, and a switch controller coupled to the current sensor and the switching element. The switch controller is powered by the power-supply unit and is configured to switch OFF the switching element when the current sensor detects an amount of current from the power-supply unit greater than a predetermined amount. An electronic system includes a power-supply unit, a load, and the above-referenced electronic circuit breaker coupled to the power-supply unit and the load. | 02-04-2010 |
20100110598 | LINE COMMUTATION TYPE FAULT CURRENT LIMITER - A line commutation type fault current limiter which can reduce manufacturing and maintenance costs, carry out line commutation by operating a cutoff switch by fault current energy, respond rapidly to a fault, be immediately restored to an original state, and perform either an active or a passive operation. The line commutation type fault current limiter includes a coupled inductor having a primary side connected to a main circuit and a secondary side matched with the primary side, a Zener diode switch electrically connected to the secondary side of the coupled inductor, a line commutation switch connected to the Zener diode switch as well as the primary side of the coupled inductor to form a bypass path in parallel with the primary side of the coupled inductor and to cut off the main circuit, when the Zener diode switch is turned on, and a current limiting unit electrically connected in parallel with the line commutation switch to limit a current flowing into the main circuit. | 05-06-2010 |
20100118462 | METHOD FOR LIMITING CURRENT AND CIRCUIT THEREFOR - A semiconductor component that includes a current limit circuit and a method for limiting current in the semiconductor component. An input/output pin is connected to the gate of a transistor and a control resistor is connected between the gate of the transistor and its source. One terminal of the control resistor is connected to the input/output pin and the other terminal is connected to another input/output pin. A current source is connected to the input/output pin. A reference voltage is generated between the two input/output pins and compared with a drain-source voltage that is between one of the two input/output pins and another input/output pin. A control voltage is set in accordance with the comparison. The control voltage then controls the voltage on another of the pins that is not common to the reference voltage and to the drain-source voltage. | 05-13-2010 |
20100123988 | Overcurrent Protection Device for a Power Supply Device and Related Power Supply Device - An overcurrent protection device for a power supply device includes a receiving end for receiving a current sensing signal, a compensating current unit coupled to the receiving end for compensating the current sensing signal in order to generate a current sense compensation signal, a first reference voltage generator for generating a first reference voltage, a comparator coupled between the compensating current unit and the first reference voltage generator for comparing the current sense compensation signal with the first reference voltage in order to generate a comparison result, a control unit coupled to the comparator for controlling a power switch of the power supply device according to the comparison result. | 05-20-2010 |
20100123989 | CONNECTION UNIT AND VEHICLE INCORPORATING THE SAME - A connection unit includes a first relay connected between a first electrode of a first battery and a first power feed line towards a vehicle load, a second relay connected between a second electrode of the first battery and a second power feed line towards the vehicle load, a third relay and a current limiting resistor connected in series between the second electrode of the first battery and the second power feed line, a fourth relay connected between an electrode of a second battery having a polarity identical to the polarity of the first electrode and the first power feed line towards the vehicle load, and a conductor line connecting an electrode of the second battery having a polarity identical to the polarity of the second electrode with the second electrode of the first battery. There can be provided a connection unit suppressed in the number of components, suitable for usage in a vehicle incorporating a plurality of power storage devices, and a vehicle incorporating the connection unit. | 05-20-2010 |
20100157498 | Current Detection and Limiting Method and Apparatus - An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value. | 06-24-2010 |
20100157499 | CURRENT LIMITING DEVICE - A modular design of a fault current limiter includes one ore more current limiting units | 06-24-2010 |
20100165532 | FAULT CURRENT LIMITER - The present disclosure is related to a fault current limiter comprising, a current limiting unit configured to limit a fault current according to a reactance value by increasing the reactance value if the fault current is generated, and a driving unit configured to increases an inductance of the current limiting unit by generating a repulsive force by means of the fault current when the fault current is received and the driving unit is connected to the front end of the current limiting unit. | 07-01-2010 |
20100165533 | CONTROL MODULE AND FAULT CURRENT LIMITER WITH FUNCTION OF OPENING AND CLOSING - The present disclosure relates to a fault current limiter, comprising: a trigger device dividing a fault current to a path on which a normal current flows and to a path on which the fault current flows when the fault current is generated; a first switch connected in series to a rear end of the trigger device; a fixation unit for fixing an open/close state of the first switch; a driver for opening a contact point contacted by the first switch by repulsive force generated by the fault current in a case the fault current divided by the trigger device is inputted; and a control module for driving the fixation unit in order to fix the open/close state of the first switch in a case the fault current is generated. | 07-01-2010 |
20100182726 | INRUSH CURRENT LIMITATION CIRCUIT - An inrush current limitation circuit for limiting inrush current when powered-on includes a power source, a switch, a voltage dividing circuit, a second diode, a transistor, a zener diode, a charging capacitor and a first diode. The voltage dividing circuit is connected between a second end of switch and a ground to divide the direct current voltage to obtain a trigger voltage signal. An anode of the second diode is connected to the second end of the switch. A base of the transistor electrically is connected to a cathode of the second diode, and a collector connected to the cathode of the second diode. A cathode of the zener diode is connected to the base of the transistor; an anode of the zener diode is connected to the ground. | 07-22-2010 |
20100195258 | Voltage Disturbance And Harmonics Monitor - An electronic monitor for monitoring characteristics of an AC power line for swells, sags, RMS voltage, impulses, total harmonic distortion (THD) and frequency. The waveform is received at the monitor, scaled to a lower magnitude, rectified by an op amp with zero offset voltage, converted a digital form which is representative of the waveform and processed to determine the occurrence of any irregularity in the AC power waveform. Two DMA channels are used to store each cycle, or groups of cycles, of the waveform into two buffers for further processing. An input surge protective circuit limits impulse voltage to the power supply. Related methods are also disclosed. | 08-05-2010 |
20100208402 | Current transformer type power controller - A current transformer type power limit controller is disclosed having a current transformer connected in series to the load. The number of turns of the primary winding and secondary winding of the current transformer are in ones place and thousands place respectively. The current transformer amplifiers voltage signal to charge capacitors through a voltage doubler circuit for the working of a detection and trigger circuit and a relay that switches off the load when the power consumed surpasses the set value (190W). The current transformer type power limit controller further includes a hold circuit, an error correction circuit, and a detection and trigger circuit. | 08-19-2010 |
20100214709 | METHODS AND SYSTEMS RELATING TO OVERCURRENT CIRCUIT PROTECTION - Systems and methods for providing overcurrent circuit protection are disclosed. A method of providing overcurrent circuit protection may include setting a threshold current value according to an operational state of a motor and sensing an amount of current being supplied to the motor. The method may further include electrically isolating the motor from a current source if the sensed current amount is greater than the threshold current value. | 08-26-2010 |
20110013328 | CLAMP FOR CONTROLLING CURRENT DISCHARGE - In many applications, particularly in automotive applications, integrated circuits (IC) are designed to withstand large fly-back currents from inductive loads. As these ICs have become smaller, the switching transistors (which are coupled to the inductive loads) have remained relatively large so as to withstand the fly-back currents. The size of these switching transistors has become a limiting factor in designing compact ICs. Here, an IC is provided with an adaptive clamp that allows for a significant reduction in the area of a switching transistor for an inductive load. | 01-20-2011 |
20110013329 | POWER SUPPLY APPARATUS, POWER SUPPLY APPARATUS CONTROL METHOD - A power supply apparatus comprises a current limiting unit connected in series between a power source and a power supply circuit that limits output current of the power source; a first switch connected in series with the current limiting unit; a second switch connected in parallel with the current limiting unit; a resistor connected in series between the power source and the current limiting unit; an abnormal current detection unit, connected in parallel with the resistor, that detects the current flowing through the resistor and determines whether or not the detected current is abnormal; and a control unit that turns on the first switch if the abnormal current detection unit detects a current, and, thereafter, turns the second switch on if the detected current is not abnormal, and turns the first switch off if the detected current is abnormal. | 01-20-2011 |
20110038086 | Multiphase electric circuit for shutting down a current conducted over respectively one AC power controller - In one embodiment of the present invention, a multiphase electric circuit is disclosed for shutting down a current conducted over respectively one AC power controller. The neutral points of the voltage systems connected to the phases are not connected to each other via a neutral conductor. The AC power controller of each phase is provided with two thyristors. A single series connection is connected parallel to all phases, which series connection comprises a capacitor and a number of parallel-connected quenching switches corresponding to the number of phases. The capacitor can be charged up via a diode bridge and a transformer. | 02-17-2011 |
20110043959 | METHOD FOR LIMITING AN UN-MIRRORED CURRENT AND CIRCUIT THEREFOR - A current limit circuit and a method for limiting current flow. The current limit circuit includes a transistor having a control electrode and current carrying electrodes. A wire is coupled to one of the current carrying electrodes. An output of a comparator is coupled to the control electrode of the transistor through a charge pump. One input of the comparator is coupled to the current carrying electrode of the transistor that is coupled to the wire and the other input of the comparator is coupled for receiving a voltage. Preferably the wire is a bond wire. The current flowing through the wire sets the input voltage appearing at the input of the comparator coupled to the current carrying electrode of the transistor. In response to the comparison of the voltages at the input of the comparator, the transistor remains turned-on or it is turned-off. | 02-24-2011 |
20110051304 | DEFECTIVITY-IMMUNE TECHNIQUE OF IMPLEMENTING MIM-BASED DECOUPLING CAPACITORS - An integrated circuit power supply decoupling circuit includes a capacitor and a protection circuit. The capacitor has a first terminal and a second terminal. The protection circuit includes a first transistor having a first conduction path, and a second transistor having a second conduction path. One terminal of the first conduction path is connected to the first terminal of the capacitor, and another terminal of the first conduction path is connected to a first power supply rail. One terminal of the second conduction path is connected to the second terminal of the capacitor, and another terminal of the second conduction path is connected to a second power supply rail. | 03-03-2011 |
20110058297 | SEMICONDUCTOR DEVICE AND CIRCUIT PROTECTION METHOD - A semiconductor device includes a current supply section configured to control a current flowing through a load circuit; an overcurrent detecting section configured to detect based on the current, that an overcurrent flows through the load circuit, to output an overcurrent signal; and an overheat detecting circuit configured to detect that a peripheral temperature exceeds a detected temperature; in response to the overcurrent signal, and output an overheat detection signal. The overheat detecting circuit has a hysteresis to the detection temperature, and the detection temperature contains an overheat detection temperature used to detect an overheat state and a recovery temperature used to detect to have escaped from the overheat state. The semiconductor device further includes a drive control circuit configured to output the current control signal which indicates the quantity of the current flowing through the load circuit based on the overcurrent signal and the overheat detection signal in the electric current supply section. | 03-10-2011 |
20110069422 | CIRCUIT FOR PREVENTING INRUSH CURRENT - An open magnetic circuit coil ( | 03-24-2011 |
20110188165 | RESISTOR WITH THERMAL ELEMENT - A current limiter and related methods to protect a switched-mode power supply from inrush current. The current limiter may include a resistive element electrically interconnected in series to a thermal element. The resistive element and the thermal element may be disposed about a single, unitary core. The resistive element may be in the form of a wire wound resistor wound about the core. The thermal element may be in the form of plated portion of the core. The thermal element may act as a thermal fuse to prevent overheating and unsafe failure of the resistive element in cases where excessive current passes through the resistive element. The thermal element may be configured to trip in a safe manner without sparking or creating exposed energized conductors. Thus the current limiter may be operable to limit inrush current while providing for safe failure modes. | 08-04-2011 |
20110216461 | System and Method to Limit In-Rush Current - An in-rush current limiting system has a fast response time so that it can be used with power supplies that turn on and off rapidly. The system dissipates very little power during the normal mode of operation. This is achieved, in various embodiments, by connecting a regulator in series with a load capacitance and in parallel with the system load. | 09-08-2011 |
20110261496 | HYBRID FAULT CURRENT LIMITER - The present invention is related to a hybrid fault current limiter comprising a switching unit detaching a moving contact located on a cable and transmitting a trip signal if a fault current is flowed at an electric power system, a semiconductor switching unit connected in series with the switching unit and configured to be turned off to limit the flow of the fault current when the trip signal is transmitted, and a circuit breaking unit connected in parallel to the switching unit and the semiconductor switching unit and configured to limit the fault current detoured from the switching unit and the semiconductor switching unit. The present invention provides rapid treatment for the fault current problem by applying the algorithm sensing the occurrence of the fault current and the algorithm limiting the fault current simultaneously. | 10-27-2011 |
20110273808 | System and Method for Detection of Multiple Current Limits - Devices, such as mobile devices, may be exposed to short circuit and output overload events. To protect against such events, mobile devices typically include current limit circuits. Some current limit circuits may involve user programmable function. User programmable function may need accurate current limit detectors. Various embodiments of the present invention include devices and methods for detecting one or more programmed current limits. Some embodiments allow for a user application to select among parallel or serial configurations of current detection circuitry. Each such configuration may include multiple resistive devices of different resistive values. | 11-10-2011 |
20110304941 | SWITCHING DEVICE - A switching device is provided which includes a switching element, and a current limiting circuit which limits current passing through the switching element when the current passing through the switching element exceeds a short-circuit detection threshold. The current limiting circuit limits the current passing through the switching element, until the current passing through the switching element becomes equal to or smaller than a current-limitation cancellation threshold which is smaller than the short-circuit detection threshold. | 12-15-2011 |
20120002336 | Method for current conditioning, in particular on a fault current limiter - A method for current conditioning, comprising transporting a primary current ( | 01-05-2012 |
20120026636 | ACTIVE AC INRUSH CURRENT CONTROL - Active inrush current control includes activating a load, the activating causing inrush current to flow, switching a semiconductor switching device to a current limiting state in response to the inrush current flow, the current limiting state being one of at least three states of the semiconductor switching device and the current limiting state dissipating the inrush current, and switching the semiconductor device to a full current flow state in response to the dissipating, the full current flow state not inhibiting current flow. | 02-02-2012 |
20120026637 | Fault Current Limiter - A fault current limiter including: an input terminal for electrically connecting to a power source that provides a load current; an output terminal for electrically connecting with a load circuit that draws the load current; and at least a first and second core of high magnetic permeability material; at least a first and second interconnected AC coil with a first AC coil formed around a first core and the second AC coil formed around a second core; at least one DC coil for magnetically biasing the cores such that, in response to one or more characteristics of the load current, the AC coil moves from a low impedance state to a high impedance state. A high magnetic permeability non-laminated material formed between the first and second cores. The high magnetic permeability non-laminated material can comprise steel. | 02-02-2012 |
20120063047 | Active Current Surge Limiters - Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal. | 03-15-2012 |
20120063048 | Active Current Surge Limiters - Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal. | 03-15-2012 |
20120075763 | SENSOR DEVICE WITH CURRENT LIMITER UNIT - A sensor device for connection to a terminal of a vehicle accumulator, having a current sensor for measuring a current drawn from and/or supplied to the vehicle accumulator, in particular upon activation of a starter or generator of the vehicle as a belt starter in the start-stop mode of the vehicle, is disclosed, in which a current limiter is provided, which limits the current that is output by or drawn from the vehicle accumulator if the current measured by the current sensor, reaches an upper threshold value. | 03-29-2012 |
20120120537 | CURRENT FAULT LIMITER WITH LIVE TANK - An apparatus for limiting fault current in a power distribution system. Such an apparatus includes a tank for containing a cryogenic fluid; and a winding supported in the tank, the winding being electrically connected to the tank. The winding and the tank are at the same electrical potential. | 05-17-2012 |
20120154969 | OVERCURRENT DETECTION CIRCUIT OF LIGHT EMITTING MODULE - There is provided an overcurrent detection circuit of a light emitting module, including: a clamping circuit unit | 06-21-2012 |
20120188677 | DSL PROTECTION CIRCUIT - The embodiments of the present application provide a DSL protection circuit, including: a DSL and POTS broadband and narrowband mixed signal port, a narrowband POTS port, and a splitter, where the DSL and POTS broadband and narrowband mixed signal port is connected to the narrowband POTS port through the splitter, and a line on which an input end or output end of the splitter is cascaded with a restorable current-limited component for limiting abnormal current; a line on which the splitter and the restorable current-limited component are cascaded is connected in parallel with a voltage-limited component for bypass conduction of the splitter; a line on which the DSL and POTS broadband and narrowband mixed signal port is or a line on which the narrowband POTS port is cascaded with an overcurrent fuse component. | 07-26-2012 |
20120200971 | Fault Current Limiter with Shield and Adjacent Cores - In a fault current limiter (FCL) of a saturated core type having at least one coil wound around a high permeability material, a method of suppressing the time derivative of the fault current at the zero current point includes the following step: utilizing an electromagnetic screen or shield around the AC coil to suppress the time derivative current levels during zero current conditions. | 08-09-2012 |
20120262831 | FAULT CURRENT LIMITER - A three-phase fault current limiter FCL has three spaced apart input terminals for electrically connecting to respective terminals of a transformer. Three output terminals electrically connect FCL with a load circuit which draws load current I | 10-18-2012 |
20120268853 | PROTECTION CIRCUIT - A protection circuit includes a power supply, a resistor-capacitor (RC) parallel circuit, an inverter, first and second electronic switches. The RC parallel circuit is connected to the power supply through a first resistor. An input terminal of the inverter is connected to the power supply through the first resistor. A first terminal of the first electronic switch is connected to an output terminal of the inverter. A second terminal of the first electronic switch is grounded. A third terminal of the first electronic switch is connected to the power supply through a second resistor. A first terminal of the second electronic switch is connected to the third terminal of the first electronic switch. A second terminal of the second electronic switch is connected to an electronic device. A third terminal of the second electronic switch is connected to an output power supply. | 10-25-2012 |
20120293903 | POWER SUPPLY APPARATUS WITH INRUSH CURRENT PREVENTION CIRCUIT - A power supply apparatus with an inrush current prevention circuit is applied to a parallel power bus. The power supply apparatus includes a filter capacitor and a current control unit. The current control unit is electrically connected to the filter capacitor. The current control unit controls a charged current flowing through the filter capacitor to prevent an inrush current generated in the parallel power bus. | 11-22-2012 |
20130021705 | FAULT CURRENT LIMITER - Provided is a fault current limiter, the limiter including a detector detecting an inflow of a fault current and transmitting a turn-off signal to a power semiconductor element; the power semiconductor element changed to an OFF state by the turn-off signal; and a resistance element connected in parallel to the power semiconductor element to block the fault current. | 01-24-2013 |
20130021706 | FAULT CURRENT LIMITER - Provided is a fault current limiter, the limiter including a detector detecting an inflow of a fault current and transmitting a turn-on signal to a first switch and transmitting a turn-off signal to a power semiconductor element, the power semiconductor element changed to an OFF state by the turn-off signal, the first switch forming a current limiting circuit by being switched to an ON state by the turn-on signal, and a resistance element blocking the fault current, wherein the series connection between the resistance element and the first switch is connected in parallel to the power semiconductor element. | 01-24-2013 |
20130021707 | PROTECTION COORDINATION SYSTEM - Provided is a protection coordination system, the system includes a current limiter arranged on a line between a first and a relays to limit a fault current generated to within a predetermined scope. | 01-24-2013 |
20130033794 | OVERCURRENT PROTECTION APPARATUS FOR SECONDARY BATTERY, PROTECTION METHOD AND BATTERY PACK - An overcurrent protection apparatus for a secondary battery includes a main relay, an auxiliary relay connected in parallel with the main relay, a current limiting resistor connected in series with the auxiliary relay and a controller for detecting an overcurrent and protect the battery module. The controller turns on the main relay and turns off the auxiliary relay in a normal state where the battery module is recharged by the generator. When the overcurrent is detected, the controller turns on the auxiliary relay and turn off the main relay so that a limited current flows through the current limiting resistor. | 02-07-2013 |
20130038974 | System and Method for Detection of Multiple Current Limits - Devices, such as mobile devices, may be exposed to short circuit and output overload events. To protect against such events, mobile devices typically include current limit circuits. Some current limit circuits may involve user programmable function. User programmable function may need accurate current limit detectors. Various embodiments of the present invention include devices and methods for detecting one or more programmed current limits. Some embodiments allow for a user application to select among parallel or serial configurations of current detection circuitry. Each such configuration may include multiple resistive devices of different resistive values. | 02-14-2013 |
20130038975 | HIGH VOLTAGE DC BREAKER APPARATUS - A high voltage DC breaker apparatus configured to break a fault current occurring in a high voltage DC conductor includes a current limiting arrangement having at least one section with at least one semiconductor device of turn-off type and at least one arrester connected in parallel therewith, and a mechanical DC breaker connected in series with the current limiting arrangement and including a mechanical switch. The mechanical DC breaker is configured to enable breaking of a fault current in said DC conductor once said semiconductor devices of said arrangement have been turned off. | 02-14-2013 |
20130070381 | OVER-CURRENT PROTECTION DEVICE - An over-current protection device includes a first substrate, a second substrate, a first grating electrode, a second grating electrode and a positive temperature coefficient (PTC) material layer. The first grating electrode and the second grating electrode are formed on the first substrate and are interlaced and spaced on a same plane. The PTC material layer is formed on the first substrate, the first grating electrode and the second grating electrode, and between the first grating electrode and the second grating electrode. In an embodiment, the first grating electrode and the second grating electrode serve as a current input port and a current output port, respectively. | 03-21-2013 |
20130120891 | Systems and Methods of Over-Load Protection with Voltage Fold-Back - In a typical DC-DC converter, an error amplifier is used to sense and amplify the difference between the feedback voltage and the reference voltage. In the event of current overloading (limit condition), example embodiments of the disclosed systems and methods of over-load protection with voltage fold-back fold back the reference voltage proportional to the current limit. The regulator may continue to regulate in this fold-back voltage reference condition without shutting down the converter, saturating the inductor, or causing a catastrophic failure at the power FETs. The disclosed systems and methods of over-load protection with voltage fold-back resolve consecutive switching cycle current build up in high input voltage DC/DC convertor applications due to the latency of current limit circuitry. | 05-16-2013 |
20130141829 | CURRENT DETECTION AND LIMITING METHOD AND APPARATUS - An apparatus for detecting and controlling current. A current detector for generating a first value that represents an amount of current being delivered to a device. A current limit circuit for generating a second value that represents a maximum permitted current level from a current source. A current controller for controlling the amount of current drawn by the device if the first value exceeds the second value. | 06-06-2013 |
20130155564 | Intrinsically Safe Energy Limiting Circuit - An intrinsically safe energy limiting circuit for connection between an upstream DC power source and a downstream electrical load powered from the upstream DC power source, wherein the circuit comprises from upstream to downstream an input to be connected to the DC power source, an electronic current limiter configured to limit a current through the circuit to a maximum value if the current reaches this value, a fuse designed to open at a current value greater than the maximum value, a DC-to-DC converter configured to convert a DC input voltage to a lower nominal DC output voltage, a zener barrier having a zener voltage higher than the DC output voltage, and an output for connection to the electrical load. | 06-20-2013 |
20130188289 | PROTECTION CIRCUIT - A protection circuit | 07-25-2013 |
20130201588 | TECHNIQUE FOR LIMITING TRANSMISSION OF FAULT CURRENT - New techniques for limiting transmission of fault current are disclosed. In one particular exemplary embodiment, the technique may be realized with a new type of apparatus for limiting transmission of fault current. The apparatus may comprise: a first enclosure electrically decoupled from ground, such that the first enclosure is electrically isolated from ground potential; first and second terminals, at least one of which is electrically connected to first one or more current carrying lines; and a first superconducting circuit contained in the first enclosure, the first superconducting circuit electrically connected to the first and second terminals, wherein the first enclosure is maintained at same electrical potential as the first one or more current carrying lines. | 08-08-2013 |
20130250466 | SHORT CIRCUIT APPARATUS AND METHOD - An assembly is disclosed which may include a serviceable unit and a current limiting device coupled to the serviceable unit. The serviceable unit may include a positive electrical terminal connection, a negative electrical terminal connection, and a plurality of energy storage devices operatively coupled to the positive electrical terminal connection and the negative electrical terminal connection to form an electrical path of the serviceable unit. The current limiting device may include a current limiting component. The current limiting component being included in the electrical path of the serviceable unit. | 09-26-2013 |
20130250467 | ELECTRICAL COMPONENT OF A CURRENT LIMITER FOR PROTECTING AN ELECTRICAL POWER SUPPLY - The invention relates to a power transistor for protecting, by limiting current, an electrical power supply, including one or more basic power vertical-junction field-effect transistors ( | 09-26-2013 |
20130250468 | ELECTRONIC DEVICE - A load circuit operates by power supplied from a power supply apparatus. A capacitive element is connected in parallel with the load circuit. A switching element is connected between the power supply apparatus and the load circuit in series with the power supply apparatus and the load circuit. A monitor section monitors voltage of the capacitive element and is connected in parallel with the capacitive element. An inrush current control section changes resistance of the switching element on the basis of the voltage monitored by the monitor section in order to control inrush current that flows at the time of an electronic device being plugged into or unplugged from the power supply apparatus. A breaker circuit prevents electric charges stored by the capacitive element from flowing into the monitor section at the time of the electronic device being unplugged from the power supply apparatus. | 09-26-2013 |
20130271889 | COMMONLY-POLED PIEZOELECTRIC DEVICE - A system for poling piezoelectric devices comprises a plurality of thin-film components, a plurality of piezoelectric devices, a poling pad for poling the piezoelectric devices, a plurality of traces, and a plurality of current-limiting elements. The thin-film components are separated by dice lanes to form an array, and the piezoelectric devices are formed on the thin-film components. The traces connect the piezoelectric devices across the dice lanes in parallel to the poling pad. Each current-limiting element is connected in series with one of the piezoelectric devices, in order to limit current to individual piezoelectric devices that experience current-related failure. | 10-17-2013 |
20130279057 | CURRENT LIMITING SYSTEMS AND METHODS - Presented systems and methods can facilitate efficient switching and protection in electronic systems. A system can comprise: an input operable to receive a signal; an adjustable component configurable to operate in a first mode which includes a low resistance and the component configurable to operate in a second mode which includes a current limiting operation in which the second mode enables continued operation in conditions that are unsafe for operation in the first mode; and an output operable to forward a signal. The adjustable component can be configurable to turn off if unsafe to operate in either the first mode or second mode. The first mode can include a relatively large component configuration with a relatively low drain to source on resistance. Utilizing a small component configuration in the second mode can include a relatively increased gate to source voltage compared to a large component configuration in the second mode. | 10-24-2013 |
20130286523 | TECHNIQUES FOR DETECTING REMOVAL OF A CONNECTOR - A system that detects electrical disconnection of one connector from another connector includes a detection circuitry and a protection circuitry. The detection circuitry detects that a plug connector has been electrically disconnected from a corresponding receptacle connector. In response to the detection, the detection circuitry sends a signal to the protection circuitry. In response to the signal, the protection circuitry lowers or terminates power being supplied to a host device via one of the contacts of the plug connector. This helps to prevent shocks/shorts that may be caused by accidental disconnection of the plug connector. | 10-31-2013 |
20130329330 | IN-RUSH CURRENT LIMITER AND METHOD FOR STOWABLE AND CARRY-ON DEVICES - A system and method for limiting in-rush current from a power source to a load includes sensing that a load has been electrically connected to receive electrical power from the power source. A current limiter circuit is configured to at least inhibit electrical current flow from the power source to the load for a predetermined time period. After the predetermined time period, the current limiter circuit is configured to no longer at least inhibit the electrical current flow from the power source to the load. Upon sensing that the load has been electrically disconnected from the power source, the current limiter circuit is reconfigured to at least inhibit electrical current flow from the power source to a load that may be subsequently connected to receive electrical power from the power source. | 12-12-2013 |
20130342948 | A PROTECTION SYSTEM FOR AN IT ELECTRICAL DISTRIBUTION SYSTEM HAVING A FLOATING REFERENCE CONDUCTOR - A protection system for an IT electrical distribution system (EDS) has a floating reference conductor and two electrical conductors in the form of an active conductor and a neutral conductor. System includes two input terminals for electrically connecting to an MEN electrical power source that is upstream of system. Two output terminals are electrically connected to an electrical load in the form of an electrical motor for a compressor of an upright freezer display. Motor is downstream of the system. A protection device, in the form of an MCB, electrically connects terminals to allow a supply of electrical power from source to motor. MCB is responsive to a fault signal at a port for selectively electrically disconnecting at least one of terminals to prevent the supply of electrical power. A sentinel unit selectively generates the fault signal at port in response to the current in conductor being greater than a predetermined threshold. | 12-26-2013 |
20140002943 | DC GRID AND A METHOD OF LIMITING THE EFFECTS OF A FAULT IN A DC GRID | 01-02-2014 |
20140029150 | INTERPOSER TO REGULATE CURRENT FOR WAFER TEST TOOLING - An interposer is described to regulate the current in wafer test tooling. In one example, the interposer includes a first connection pad to couple to automated test equipment and a second connection pad to couple to a device under test. The interposer further includes an overcurrent limit circuit to connect the first and second connection pads and to disconnect the first and second connection pads when the current between the first and second connection pads is over a predetermined amount. | 01-30-2014 |
20140055901 | SOLID STATE FAULT ISOLATION DEVICES AND METHODS - Disclosed herein are solid state fault isolation devices and methods. According to one or more embodiments, a semiconductor current fault controlled device is provided. The device includes a semiconductor substrate of N-type conductivity. The substrate has opposed major surfaces. An anode region of P-type conductivity is formed in one major surface. A P-type buried layer is formed in a first portion of the other major surface. A junction field-effect transistor (JFET) is formed in a second portion of the other major surface. A P-type top layer is formed in the JFET and forms a channel defined by an overlap between the P-type buried layer and the P-type top layer. The channel laterally extends to the semiconductor substrate from a cathode region and being shielded from the anode region. | 02-27-2014 |
20140063672 | SYSTEM FOR SUPPLYING DIRECT CURRENT AND DC VOLTAGE PROTECTED BY A CURRENT LIMITER, AND METHOD FOR PROTECTING SAME - A system for supplying direct current and DC voltage is provided. The system comprise a first supply branch having a first DC voltage source and a power field-effect transistor of a current limiter which are connected in series, and a second supply branch having a second DC voltage source. The power transistor has a current/voltage characteristic with a first inverse polarization area without current limitation, and a second conduction area with current limitation based on a current threshold. The power field-effect transistor is connected to the first voltage source with an inverse polarization when the voltage source of the first branch is operating normally. | 03-06-2014 |
20140071573 | Electrical Load Controller with Neutral Detection - An electrical load control device as disclosed above is capable of detecting when it has been connected to either a leakage type (two-wire) or a Neutral type (three-wire) power input and automatically adjust its operation accordingly. In leakage operation the leakage current is limited to 0.5 ma and in three-wire or neutral operation the power supply provides more current than in leakage operation. In neutral operation, one or more signals are provided to the microprocessor to enable operation of indicator or other power consuming elements. | 03-13-2014 |
20140098452 | POWER SUPPLY APPARATUS RELATING TO DC-DC VOLTAGE CONVERSION AND HAVING SHORT PROTECTION FUNCTION - A power supply apparatus is provided, and which includes a power conversion circuit, a control chip with soft-start function and a short protection circuit. The power conversion circuit is configured to provide a DC output voltage to a load in response to an output pulse-width-modulation (PWM) signal. The control chip is operated under a DC input voltage, and configured to generate the output PWM signal to control the operation of the power conversion circuit. The short protection circuit is configured to pull-down the level of a soft-start pin of the control chip, so as to substantially/significantly reduce the frequency and duty cycle of the output PWM signal, and then substantially/significantly reduce the current flowing through the shorted load. | 04-10-2014 |
20140118876 | CIRCUIT INPUT PROTECTION DEVICE AND METHOD OF ASSEMBLING THE SAME - A circuit input protection device and methods of assembling the same are provided. The circuit input protection device includes a current limiting device configured to limit inrush current to a target circuit and a diode coupled to the current limiting device. | 05-01-2014 |
20140133058 | DRIVING CIRCUIT - A driving circuit includes several first electrostatic current limiting resistors and several digital to analog converter (DAC) units. First ends of these first electrostatic current limiting resistors common coupled to a global path to receive a reference voltage. These DAC units respectively coupled to second ends of the first electrostatic current limiting resistors one-on-one to receive the reference voltage through the first electrostatic current limiting resistors. | 05-15-2014 |
20140177120 | SYSTEM AND METHOD FOR FAULT PROTECTION - A protection system includes a control module, a switch, and an inductive device. The control module is used to provide control signals and switching signals based at least in part on a detected signal measured by a detecting device. The control signals include a first control signal corresponding to a normal mode and a second control signal corresponding to a fault mode. The switch is switched on and off according to the switching signals. The inductive device is coupled with the switch. The inductive device is controlled to be operated with a first inductance in response to the first control signal provided from the control module and a second inductance in response to the second control signal provided from the control module. | 06-26-2014 |
20140198423 | CURRENT LIMITER CIRCUIT FOR CONTROL AND PROTECTION OF MOSFET - A circuit for controlling a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) to generate a DC output voltage from a DC input voltage includes a first MOSFET and a second MOSFET. The circuit includes a gate resistor coupled to the first MOSFET. The circuit includes a first resistor and a zener diode coupled to the second MOSFET. In addition, the circuit includes a diode coupled to the zener diode and the first MOSFET. The circuit includes a first current path wherein the first current path includes the diode and the first MOSFET. The circuit includes a third MOSFET. Further, the circuit includes a Resistor-Capacitor (RC) filter coupled to source terminal of the third MOSFET. The circuit includes a third resistor having a first terminal and a second terminal, wherein the second terminal is coupled to drain terminal of the third MOSFET. The circuit also includes a fourth MOSFET. | 07-17-2014 |
20140204493 | Relay Control Circuit - A relay control circuit is disclosed. In one aspect, the relay control circuit is a hybrid of a double winding relay control scheme and a single winding relay control scheme. | 07-24-2014 |
20140211354 | WIRELESS COMMUNICATION BASE STATION WITH CURRENT LIMITING CAPABILITY - A wireless communication system base station ( | 07-31-2014 |
20140254056 | FAULT CURRENT LIMITER - A fault current limiter is provided that comprises a magnetically saturable core. The first core includes a first leg, a second leg, with a first AC coil wound on the second leg, a third leg, with a second AC coil wound around the third leg, the first and second AC coils being wound in series and connected to a first phase AC source, and a fourth leg. The first magnetic biasing unit is arranged to produce a first closed magnetic circuit in the first leg and the second leg that has a first flux direction, and the second coil is arranged to produce a second closed magnetic circuit in the fourth leg and the third leg that has a second flux direction, wherein the first flux direction opposes the second flux direction. The first and second AC coils are arranged to produce a first closed AC magnetic circuit in the second and third legs in an AC flux direction that alternates with each AC half-cycle. | 09-11-2014 |
20140321021 | SWITCH MODE CURRENT LIMITER - A current limiter ( | 10-30-2014 |
20140334052 | STRUCTURE AND METHOD FOR SELF PROTECTION OF POWER DEVICE WITH EXPANDED VOLTAGE RANGES - A vertical semiconductor power device includes a top surface and a bottom surface of a semiconductor substrate constituting a vertical current path for conducting a current there through. The semiconductor power device further includes an over current protection layer composed of a material having a resistance with a positive temperature coefficient (PTC) and the over current protection layer constituting as a part of the vertical current path connected to a source electrode and providing a feedback voltage a gate electrode of the vertical semiconductor power device for limiting a current passing there through for protecting the semiconductor power device at any voltage. | 11-13-2014 |
20140334053 | OVER-CURRENT PROTECTION DEVICE - An over-current protection circuit including, a current supply switch with a first terminal coupled to a supply current input and with a second terminal coupled to a supply current output. The current supply switch is switchable at least between an on-state, in which the current supply switch provides a conductive connection between the first terminal and the second terminal, and an off-state, in which the current supply switch interrupts the conductive connection between the first terminal and the second terminal. The over-current protection circuit receives a supply current via the supply current input and provides the supply current via the supply current output if the switch is in the on-state. The current supply switch includes High Electron Mobility Transistor. | 11-13-2014 |
20140355161 | FAST TRANSIENT PRECISION POWER REGULATION APPARATUS - Apparatus disclosed herein implement a fast transient precision current limiter such as may be included in an electronic voltage regulator. The current limiter includes two current sense element/current clamp control loops. A fast response time control loop first engages and clamps a current spike. A precision control loop then engages to more accurately clamp the output current to a programmed set point. The precision clamping loop includes an inner loop to linearize the precision current sense element. The inner loop forces the drain-to-source voltage (VDS) of the precision sense element to track the VDS of the regulator pass element. A more precise clamping operation results. Overall speed is not sacrificed as the fast response time clamping loop operates in parallel to protect circuitry while the precision clamping loop engages. | 12-04-2014 |
20150016005 | INRUSH CONTROL WITH MULTIPLE SWITCHES - A novel system is offered for supplying power from an input node to a load coupled to an output node. The system may have multiple switches coupled between the input node and the output node. One or more limiting circuits may be configured for controlling the switches so as to limit outputs of the switches. For example, the limiting circuits may limit current through the respective switches. One or more timers may set a delay period for indicating a fault condition after the limiting is initiated. | 01-15-2015 |
20150043120 | DIRECT-CURRENT CIRCUIT BREAKER - A direct-current circuit breaker includes a switching unit inserted in the direct-current line; and a commutation circuit that includes a series circuit including a first current-limiting element and an interrupting unit that forms a current zero point by superimposing a resonance current on a direct current flowing in the direct-current line and interrupts the direct current at the current zero point, that is connected in parallel with the switching unit, and that becomes a flow path for the direct current after the switching unit is opened, wherein current interruption is performed by the interrupting unit after the switching unit is opened. | 02-12-2015 |
20150077893 | ELECTROMAGNETIC DC PULSE POWER SYSTEM INCLUDING INTEGRATED FAULT LIMITER - An electromagnetic direct current (DC) power system includes a plurality of pulse forming networks (PFN) modules. Each pulse forming network (PFN) module includes a PFN circuit, a fault current limiting (FCL) circuit and a cooling system. The pulse PFN circuit is configured to generate a pulsed DC output power. The PFN circuit further includes at least one energy storage inductor with primary winding having a primary winding inductance that controls a primary impedance of the PFN circuit. The FCL circuit includes a secondary winding that electrically communicates with the primary winding. The FCL circuit is configured to receive fault energy existing in the PFN circuit during a fault event. The cooling system is configured to cool at least one of the primary winding and the secondary winding, and remove a portion of the fault energy. | 03-19-2015 |
20150085416 | INTEGRATED CIRCUIT WITH PROTECTION FUNCTION - An integrated circuit generating a driving signal to a load according to an input voltage and including an impedance switching unit, a first protection unit, a first detection unit and a control unit is disclosed. The impedance switching unit takes the input voltage as the driving signal according to a control signal. The first protection unit generates a first detection signal when a current passing through the impedance switching unit is higher than a predetermined current. The first detection unit detects a voltage of the impedance switching unit to generate a detection result. The control unit controls the control signal according to the first detection signal. | 03-26-2015 |
20150103459 | ACTUATOR CIRCUIT FOR CONTROL OF CIRCUIT BREAKER - The invention relates to an actuator circuit for actuating a circuit breaker controller, the circuit being characterized in that it comprises two branches in parallel between two terminals and in that
| 04-16-2015 |
20150109708 | Input Redundant Circuit - An input redundant circuit according to the present disclosure may include: a core power supply unit; a first input port connected to a first input voltage; a second input port connected to a second input voltage; a relay unit connected to the first input port and the second input port to supply one of the first input voltage and the second input voltage to the core power supply unit; and a surge current limiting unit coupled to the relay unit, configured to limit a surge current generated when the relay unit is switched between the first input voltage and the second input voltage. | 04-23-2015 |
20150138683 | FAULT CURRENT LIMITER - A fault current limiter is provided. According to an embodiment of the present disclosure, the fault current limiter includes a switch whose contact point is opened when a fault current occurs; a current limiting element configured to limit the fault current when the fault current occurs; and a diode being serial-connected to the current limiting element, wherein a breakdown voltage of the diode is higher than a voltage drop by an impedance of the switch when a normal current flows. | 05-21-2015 |
20150303683 | HOT PLUG DEVICE PROVIDING TURN ON FETS WITH A SOFTSTART CAPABILITY - A hot plug device includes an electronic subsystem and a plurality of main turn on FETs, wherein each main turn on FET includes a gate, a power input for coupling to a power source, and an output for controllably providing power to the electronic subsystem. An auxiliary current path is in parallel with the main turn on FETs and includes a fuse, an impedance element and an auxiliary turn on FET. A turn on controller controls the main turn on FETs and the auxiliary turn on FET. Current is initially through the high impedance auxiliary current path to apply voltage to an output power rail. Subsequently, current is allowed to pass through a plurality of main turn on FETs to the output power rail in response to the output power rail having a voltage exceeding a voltage threshold as a result of using the high impedance auxiliary current path. | 10-22-2015 |
20150364913 | LOAD DRIVING CIRCUIT - A short circuit detection circuit has an output voltage of a switching device inputted and, when the value of the output voltage becomes lower than a specified threshold value due to an abnormal state such as a load short circuit state, outputs a control signal to a clamping circuit for making the clamping circuit carry out such a clamping operation as to limit the output current of the switching device. When the output voltage rises again by the turning-on operation of the switching device, the change in the output voltage is transmitted onto the output side through a capacitor with following rising in the control signal, by which the rising of the output signal is detected with little delay. | 12-17-2015 |
20150372516 | IDENTIFICATION MODULE CARD INCLUDING BATTERY PROTECTION CIRCUIT MODULE, AND PORTABLE WIRELESS DEVICE INCLUDING THE IDENTIFICATION MODULE CARD - Provided is an identification module card mountable in a portable wireless device operating by receiving power supplied from a battery, the identification module card including a battery protection circuit module for detecting and blocking overcharge, overdischarge, and/or overcurrent of the battery, and having embedded at least a part of the battery protection circuit module therein. | 12-24-2015 |
20150382505 | SUPERCONDUCTING FAULT CURRENT LIMITER AND COOLING METHOD FOR SUPERCONDUCTING ELEMENT WITHIN SUPERCONDUCTING FAULT CURRENT LIMITER - A superconducting fault current limiter ( | 12-31-2015 |
20160013634 | Fault Current Limiter | 01-14-2016 |
20160020604 | CURRENT-LIMITING AND POWER-FLOW CONTROL DEVICE - A current-limiting and power-flow control device according to the present invention includes a superconducting current-limiting element including a superconductor, a series capacitor, and a parallel circuit. The series capacitor is connected in series with the superconducting current-limiting element. The parallel circuit includes a reactor connected in parallel with a series circuit including the superconducting current-limiting element and the series capacitor. Accordingly, overcurrent at the time of occurrence of a fault causes transition of the superconductor of the superconducting current-limiting element to the normal conducting state, and thus causes autonomous current-limiting operation of the superconducting current-limiting element. Thus, application of an excessive load across the terminals of the series capacitor due to the aforementioned fault can surely be prevented. Accordingly, unlike the conventional device, it is unnecessary to install an arrester for protection of the series capacitor and the configuration of the current-limiting and power-flow control device can be simplified. | 01-21-2016 |
20160036215 | SYSTEMS AND METHODS FOR HYBRID VOLTAGE AND CURRENT CONTROL IN STATIC UPS SYSTEMS - A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), each UPS of the plurality of UPSs including an inverter, a ring bus, and at least one controller communicatively coupled to the plurality of UPSs, the at least one controller configured to determine when a bridge current in at least one UPS of the plurality of UPSs reaches a predetermined bridge current limit, and modify, in response to the determination, a capacitor voltage in the inverter of the at least one UPS to reduce a DC fault current component of a load current in the inverter. | 02-04-2016 |
20160036216 | SYSTEMS AND METHODS FOR EXPLOITING CURRENT CAPABILITY IN STATIC UPS - A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), each UPS of the plurality of UPSs including an inverter, a ring bus, and at least one controller communicatively coupled to the plurality of UPSs, the at least one controller configured to control at least one bridge current in each UPS, the at least one bridge current controlled such that the inverter of each UPS operates in a partial current limiting regime between a full current limiting regime and a linear mode. | 02-04-2016 |
20160105018 | HYBRID DIRECT-CURRENT CIRCUIT BREAKER - A circuit breaking system includes a first branch including at least one solid-state snubber; a second branch coupled in parallel to the first branch and including a superconductor and a cryogenic contactor coupled in series; and a controller operatively coupled to the at least one solid-state snubber and the cryogenic contactor and programmed to, when a fault occurs in the load circuit, activate the at least one solid-state snubber for migrating flow of the electrical current from the second branch to the first branch, and, when the fault is cleared in the load circuit, activate the cryogenic contactor for migrating the flow of the electrical current from the first branch to the second branch. | 04-14-2016 |
20160105019 | PROTECTION DEVICE AND PROTECTION METHOD - A current path of a first transistor is connected in series to a communication line. When the electric current through the current path of the first transistor becomes equal to or greater than a set electric current, a current-limiting controller limits the electric current through the current path by controlling the first transistor to increase the resistance of the current path. When the end-to-end voltage of the current path of the first transistor becomes equal to or greater than a set voltage, a load limiter switches the first transistor off. | 04-14-2016 |
20160156175 | CURRENT-LIMITING REACTOR APPARATUS | 06-02-2016 |
20160181792 | SEMICONDUCTOR DEVICE AND CURRENT LIMITING METHOD | 06-23-2016 |
20160181793 | ELECTROMAGNETIC DC PULSE POWER SYSTEM INCLUDING INTEGRATED FAULT LIMITER | 06-23-2016 |
20160181794 | Inrush Current Limiting Circuit | 06-23-2016 |