Entries |
Document | Title | Date |
20080198523 | Circuit Breaker for a Solar Module - A circuit breaker for a solar module, wherein a plurality of solar cells working in normal operation and when shaded are connected in series. At least one controlled electrical switch element serves as a bypass element and is connected in parallel with its contact gap to a plurality of solar cells. A supply circuit provides a control voltage for controlling the control electrode of the bypass element. An isolating circuit blocks the voltage applied to the contact gap of the bypass element in the normal operation and switches the voltage that is applied to the contact gap to the supply circuit when at least one solar cell is shaded. | 08-21-2008 |
20080212247 | Insulated gate bipolar transistor fault protection system - An Insulated Gate Bipolar Transistor (IGBT) fault protection system is provided. The fault protection system includes a GVPA, a gate voltage clamper, and a soft-off unit. The GVPA analyzes a gate voltage pattern of an IGBT to determine whether or not a fault has occurred. The gate voltage clamper prevents an increase in a gate voltage of the IGBT according to an output signal that the GVPA outputs when a fault has occurred. The soft-off unit softly turns off the IGBT according to an output signal that the GVPA outputs when a fault has occurred. | 09-04-2008 |
20080285193 | POWER SUPPLY APPARATUS - A power supply apparatus includes: a plurality of batteries; a changeover portion switching the connection between the plurality of batteries; a short-circuit battery detection portion, if an internal short-circuit is produced in any of the plurality of batteries, detecting this internal short-circuit battery; and a changeover control portion, if the short-circuit battery detection portion detects the internal short-circuit battery, allowing the changeover portion to switch the connection between the plurality of batteries in such a way that this internal short-circuit battery and at least one of the other batteries are connected in series to thereby form a closed circuit. | 11-20-2008 |
20090073624 | High Voltage Interlock System and Control Strategy - A High Voltage Interlock Loop (HVIL) system and Control Strategy is provided for an alternative fuel vehicle such as an electric, a hybrid electric, or a fuel cell vehicle. Generally, the HVIL system having associated logic including an HVIL circuit is provided to allow the vehicle to operate in either a high voltage (HV) or power mode powered by a power source or a HVIL interrupt mode based on an operational state of the HVIL system. When HVIL circuit fails shorted high, low or open, a Diagnostic Trouble Code (DTC) is set and the Service Soon Lamp is illuminated to indicate to a service technician that additional safety precautions need to be taken when servicing the HV system. The HV contactors may or may not be activated providing HV to the vehicle when HV is not expected to be present at connectors and HV devices. | 03-19-2009 |
20090154043 | BACKLIGHT UNIT HAVING PROTECTION CIRCUIT USING CENTER-TAP - There is provided a backlight unit having a protection circuit using a center-tap, the backlight unit including: a current balancing unit including a plurality of primary coils individually transmitting the lamp driving power from an inverter unit to the lamps, and a plurality of secondary coils each formed of one conductor having a center-tap, and receiving an electromagnetically induced voltage from each of the plurality of primary coils, the one end and the center-tap of each of the plurality of secondary coils connected in series with the one end and the center-tap of the neighboring secondary coil to form at least one closed loop and maintain current transmitted to each of the lamps balanced; a sensing unit sensing a variation in current of the closed loop and a variation in current of the primary coil from the current balancing unit; and a determination unit determining whether each of the lamps performs an abnormal operation or not. | 06-18-2009 |
20090310269 | ARRANGEMENT AND METHOD FOR DEACTIVATING ELECTRICAL ELEMENTS WHEN MALFUNCTIONING - Arrangements ( | 12-17-2009 |
20110002074 | PROTECTION CIRCUIT FOR CONTROL BOARD - A protection circuit for a control board is provided. The protection circuit is suitable for being disposed on a light on tester that may output a test voltage to a display module. The protection circuit includes a control device and a voltage stabilizer. The control device includes a first switching element and a control element. The control element enables the first switching element to output an operating voltage. The voltage stabilizer includes a second switching element and an operation module. The operation module may control the second switching element according to the operating voltage, so as to switch on or switch off an input of the test voltage to the display module. | 01-06-2011 |
20110007442 | Rapid discharging circuit upon detection of abnormality - Provided is a protection circuit that is connected between a power supply terminal and an output terminal, and turns off an output transistor when an abnormality occurs in a system, the output transistor outputting a current to a load connected to the output terminal, the protection circuit including: a first discharge unit that is connected between a gate electrode of the output transistor and the power supply terminal, and discharges an electric charge of the gate electrode until a potential of the gate electrode becomes equal to a power supply potential, when an abnormality occurs in the system, and a second discharge unit that is connected between the gate electrode and a source electrode of the output transistor, and discharges the electric charge of the gate electrode until the potential of the gate electrode becomes equal to an output potential, when an abnormality occurs in the system. | 01-13-2011 |
20110058296 | Method of Detecting a Fault Condition of a Load Control Device - A load control device comprises a bidirectional semiconductor switch for controlling the amount of power delivered to an electrical load, and the bidirectional semiconductor switch further comprises two field effect transistors (FETs) in anti-series electrical connection. In the event that one of the FETs fails in a shorted state, and if the load control device is using a phase control dimming technique to control the load, the load control device may provide an asymmetric waveform to the electrical load. In order to determine whether this asymmetric waveform is present, a microprocessor of the load control device use voltage thresholds and/or offsets to monitor the voltage across the FETs. Thus, the microprocessor is operable to detect a fault condition of the load control device wherein the fault condition may comprise an asymmetry condition, or more particularly, a failure condition of one of the FETs. | 03-10-2011 |
20110205679 | Protection circuit and semiconductor device - A protection circuit | 08-25-2011 |
20120162842 | SHUNT SYSTEM FOR CELLS IN A FUEL CELL STACK - A shunt system for a stack of series connected electrochemical units. The system includes shunt circuits each connected between a positive pole and a negative pole of an electrochemical unit and a control circuit to send a control signal to at least one of the shunt circuits to cause it to shunt the electrochemical unit between the poles to which it is connected. The control system includes control modules each having its own voltage reference, each of the shunt circuits belonging to one of the modules. Each control circuit includes plural shunt circuits and the shunt circuits belonging to a control module are connected between the poles of contiguous electrochemical units, so that the control modules subdivide the stack into plural groups of electrochemical units. Each control module includes a mechanism to communicate with the control circuit, so that the control circuit can control the shunt circuits belonging to different control modules. | 06-28-2012 |
20120307410 | SEMICONDUCTOR INTEGRATED CIRCUIT AND MANUFACTURING METHOD THEREOF - A semiconductor integrated circuit includes a protected circuit connected to two power supply lines that provide a supply voltage, a detecting circuit that includes a resistive element and a capacitive element connected in series between two power supply lines and detects a surge generated in the power supply line based on potential variation of an inter-element connecting node, and a protection transistor that is connected between two power supply lines and has a control electrode connected to an output of the detecting circuit. The protection transistor has the control electrode formed from a different electrode material having a work function difference from a transistor of the same channel conductivity type in the protected circuit, to have a different threshold voltage from the transistor so that the amount of leakage current per unit channel width may be smaller compared with the transistor. | 12-06-2012 |
20120320480 | DEVICE FOR PROTECTING AN INTEGRATED CIRCUIT CHIP AGAINST ATTACKS - An integrated circuit chip includes: a plurality of parallel wells of alternated conductivity types formed in the upper portion of a semiconductor substrate of a first conductivity type; in each well of the first type, a plurality of MOS transistors having a channel of the second conductivity type, and in each well of the second type, a plurality of MOS transistors having a channel of the first type, transistors of neighboring wells being inverted-connected; and a device of protection against attacks, including: a layer of the second type extending under said plurality of wells, from the lower surface of said wells; and regions of lateral insulation between the wells, said regions extending from the upper surface of the wells to said layer. | 12-20-2012 |
20130114177 | CIRCUIT PROTECTION DEVICE - A voltage suppression device for suppressing voltage surges in an electrical circuit having a voltage sensitive element within a tubular casing. | 05-09-2013 |
20130235500 | PROTECTION CIRCUIT FOR LITHIUM-ION BATTERY - A protection circuit for lithium-ion battery is provided. The protection circuit samples the voltage of the lithium-ion battery as a sample voltage and outputs the sample voltage. A switch circuit includes a first switch having two first connection terminals and a first control terminal. The first switch connects the two connection terminals when the control terminal receives a high logic level and disconnects the two connection terminals when the control terminal receives a low logic level. One of the first connection terminals is connected to the lithium-ion battery through a first current-limiting resistor to receive a battery voltage and is connected to an output terminal of the switch circuit, the other first connection terminal is grounded. The output terminal outputs a logic low level as a turn-on signal and a logic high level as a turn-off signal of the lithium-ion battery. | 09-12-2013 |
20130321967 | FAULT DETECTION CIRCUIT, ELECTRONIC EQUIPMENT AND FAULT DETECTION METHOD - A fault detection circuit includes: a switching element, disposed between a first node and a second node, configured to perform a switching operation in accordance with a control signal; and a detection circuit configured to detect a temporal voltage change at the second node according to the switching operation of the switching element. | 12-05-2013 |
20140016237 | PROTECTIVE CIRCUITRY CONTROLS POWER SUPPLY ENABLEMENT - A protective circuit compares at least two different signals and asserts a control node toward respective logic states accordingly. At least one of the signals is derived from a voltage on a power rail within a computer or other device. A switching element passes or isolates an enable signal based on the logic state of the control node, enabling or preventing operation of a power supply, accordingly. Central processing units (CPUs) or other elements are protected against electrically caused damage in the event that a fault is detected by the protective circuit. | 01-16-2014 |
20140016238 | RELAY-WELDING DETECTION CIRCUIT AND POWER SUPPLYING SYSTEM - The relay-welding detection circuit detects welding of relays (RYP, RYN) provided on a charging path from an external power supply (PW) to a first battery ( | 01-16-2014 |
20140285936 | BATTERY MANAGEMENT SYSTEM FOR ELECTRIC VEHICLE - A battery management system for a vehicle having an electrically powered motor that is powered by a plurality of battery cells includes an electrical system for providing voltage and current from the battery cells to an electrical motor. A control is operable to at least one of (a) cause fuses of the electrical system to be the weakest link in the electrical system only during a failure event, (b) disconnect the battery cells from the battery management system only during a failure event, (c) separate the driving of balancing resistors into first and second stages, with the first stage comprising cell balancing control and the second stage comprising cell balancing with reverse voltage protection and (d) provide single stage reverse voltage protection to limit or effectively eliminate an electrical conduction path through a low impedance balancing circuit. | 09-25-2014 |
20140321017 | Semiconductor Integrated Circuit - A first power line configured to receive a first voltage, a second power line configured to receive a second voltage which is lower than the first voltage, a first clamping unit configured to be connected to the first power line, a second clamping unit configured to be connected between the first clamping unit and the second power line, and a discharging unit configured to, when an abnormal voltage introduced through the first power line or the second power line is applied, discharge the abnormal voltage by coupling with the first clamping unit or the second clamping unit are included. | 10-30-2014 |
20150103457 | Modular Equipment Center Solid State Primary Power Switching Network - A solid state primary power switching network for modular equipment centers (MECs) distributing primary power throughout a vehicle. The solid state primary power switching network includes multiple primary power switch network devices (PPSNDs) of a MEC for controlling and distributing primary power to other MECs spatially distribute throughout a vehicle. In one or more configurations, the PPSNDs have a universal structure in that each includes a common power input source and a plurality of common power outputs. In one or more configurations, primary power sources to the vehicle are switched without a perceivably visible break in power. | 04-16-2015 |
20150340856 | ACTIVE ESD PROTECTION CIRCUIT - A high-voltage gate driver circuit configured to drive a high-side power switch and a low-side power switch includes an active dv/dt triggered ESD protection circuit coupled between a protected node and a power rail node. The active dv/dt triggered ESD protection circuit includes a dv/dt circuit controlling an ESD protection transistor connected between the protected node and the power rail node. The ESD protection transistor is turned on when an ESD event occurs at the protected node to conduct ESD current from the protected node to the power rail node. The dv/dt circuit is charged up after a time constant to disable the ESD protection transistor. | 11-26-2015 |
20160380423 | SIGNAL HANDLING FOR INACCESSIBLY LOCATED POWER EQUIPMENT - A protection arrangement for inaccessibly located power distribution equipment includes a first enclosure with power equipment and sensors, a second enclosure adjacent the first enclosure and including a signal handling device, at least one sealed electrical conductor passage between the first and second enclosures, each comprising at least one penetrator through the walls of the first and second enclosures. The signal handling device in the second enclosure is connected to the sensors in the first enclosure via electrical conductors passing through said sealed electrical conductor passages and to an external protection device via a communication link. The signal handling device receives electrical sensor signals from the sensors and shapes them for submission to the external protection device. | 12-29-2016 |
20170237249 | COMMUNICATION DISTRIBUTION UNIT CONTAINING AT LEAST ONE POWER SWITCH | 08-17-2017 |