| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361015000 | Capacitor protection | 23 |
| 20090021871 | Energy Storage Pack Having Overvoltage Protection and Method of Protection - An energy storage pack specially adapted for a hybrid electric vehicle, the energy storage pack having overvoltage protection and a method of protecting the same. In particular, the energy storage pack includes a robust, low-cost, parasitic circuit configured to detect overvoltage conditions within the vehicle energy storage and report it to the vehicle. | 01-22-2009 |
| 20090080126 | Energy Storage Device Coupler and Method - An energy storage device coupler for transferring heat away from ends of ultracapacitors of an ultracapacitor energy storage cell pack without shorting out terminals to cases of the ultracapacitors. The energy storage device coupler includes an ultracapacitor engagement member configured to be in thermal contact with the end of the ultracapacitor and including and holes configured to receive terminals of adjacent ultracapacitors; and a heat sink engagement member connected to the ultracapacitor engagement member and configured to be coupled to one or more heat sink devices for removing heat from the ultracapacitor. | 03-26-2009 |
| 20090174972 | High-Power Ultracapacitor Energy Storage Pack and Method of Use - An ultracapacitor energy storage cell pack includes an ultracapacitor assembly including a plurality of parallel ultracapacitors and balancing resistors in series; an enclosure for the ultracapacitor assembly; a controller; one or more temperature sensors; a pack voltage sensor; a GFI sensor; one or more cooling fans carried by the enclosure; an on/off relay coupled to the ultracapacitor assembly and the controller, the on/off relay activated by the controller during normal operation of the ultracapacitor assembly and deactivated by the controller when the GFI sensor detects a ground fault interrupt condition, the one or more temperature sensors detect an over-temperature condition, or the pack voltage sensor detects an over-voltage condition; and a pre-charge resistor and a pre-charge relay coupled to the ultracapacitor assembly and the controller, and activated by the controller to cause the pre-charge resistor to limit pack charge current until the ultracapacitor assembly reaches a minimum voltage. | 07-09-2009 |
| 20090231764 | Capacitor Bank Monitor and Method of use Thereof - A capacitor bank monitor apparatus for monitoring a state of a common ground connected to a capacitor bank comprises a sensor that that can be coupled to the common ground for collecting measurements relating to the state of the common ground. The monitor also comprises a controller that is logically coupled to the sensor for receiving the measurements and determining whether a fuse on the capacitor bank has opened. The ground monitor also comprises a communications facility that is logically coupled to the controller for communicating a notification that the fuse has opened. The communications facility may comprise a cellular communications device. The ground monitor also may comprise a filter that is electrically connected to the sensor and the controller. The ground monitor also may comprise memory that is logically coupled to the controller for storing at least one state of the common ground. | 09-17-2009 |
| 20090268354 | HIGH-VOLTAGE BUS DISCHARGE WITH LOGARITHMIC SELF-PROTECTION - Systems and methods for discharging a high-voltage bus coupled to a discharge circuit are provided. A method comprises obtaining a first voltage level of the high-voltage bus. The method further comprises determining a first discharge time based on the first voltage level and activating the discharge circuit. The method further comprises obtaining a second voltage level of the high-voltage bus after the first discharge time, comparing the first voltage level and the second voltage level, and deactivating the discharge circuit if a difference between the first voltage level and the second voltage level is less than a threshold value. | 10-29-2009 |
| 20100020449 | CORRECTIVE DEVICE PROTECTION - A control system for an electrical power system includes an electrical corrective device, a voltage measuring device coupled to each phase of the electric power system, a current measuring device connected between each phase of the electric power system and the electrical corrective device, and a protective device connected to outputs of the voltage measuring device and the current measuring device. The protective device includes a controller configured to detect an imbalance using the measured voltages and currents output from the voltage measuring device and the current measuring device without using or independently of other recent voltage or current measurements for other points in the electrical corrective device and independently of a neutral-ground measurement at the electrical corrective device. | 01-28-2010 |
| 20100046122 | Fault protection device - A fault protection device includes a magnetic capacitor unit and an isolation switch. The magnetic capacitor unit is capable of storing electrical energy, and has a first end and a second end. The isolation switch is capable of being switched on to electrically connect the first end of the magnetic capacitor unit to the second end of the magnetic capacitor unit for forming a short-circuit path between the first and second ends of the magnetic capacitor unit when the magnetic capacitor unit breaks down. | 02-25-2010 |
| 20100226049 | Systems and Methods for Protecting a Series Capacitor Bank - Systems and methods for protecting a series capacitor bank are provided. According to one exemplary embodiment of the invention, there is disclosed a capacitor protection circuit. The capacitor protection circuit may include a capacitor bank, a pilot circuit and a main commutation gap. The pilot circuit and the main commutation gap may be provided in parallel electrical communication with the capacitor bank. Additionally, one or more plasma injectors may be provided in series electrical communication with the pilot circuit. The plasma injectors may be operable to provide partially or completely ionized plasma across the main commutation gap to make conductive the main commutation gap. | 09-09-2010 |
| 20100277836 | SMART CAPACITOR - A smart capacitor includes a main capacitor having at least one intelligence mechanism selected from a prognostics mechanism and a high speed protection mechanism integrated within the main capacitor. The at least one intelligence mechanism and the main capacitor are together configured to generate at least one type of output signal selected from long term induced failure mechanism signals and sudden capacitor failure condition signals in response to desired input signals. | 11-04-2010 |
| 20100296204 | Control device of power supply circuit - An ECU executes a program including a step of turning on an SMRP and an A-SMRP if an ignition switch is turned on; a step of detecting voltage values VB( | 11-25-2010 |
| 20110141630 | SUPERCAPACITOR LEAK DETECTION AND MANAGEMENT - Some embodiments of the present invention provide a system that facilitates the operation of a supercapacitor. During operation, the system measures an electrical parameter of the supercapacitor using a set of conductor rings surrounding a capacitor seal of the supercapacitor. Next, the system determines the presence of a leak in the supercapacitor based on the electrical parameter. Finally, the system manages the operation of the supercapacitor based on the presence of the leak. | 06-16-2011 |
| 20110235218 | CONTROL CIRCUIT AND MOTOR DEVICE - A control circuit has an input terminal for receiving an input voltage, an energy accumulator for storing electric energy from the input terminal and supplying power to an electrical load, and an over-voltage protection unit for lowering the voltage at the input terminal when the voltage at an output terminal of the energy accumulator exceeds a predetermined threshold value. A motor device combines the control circuit with an electric motor as the load. | 09-29-2011 |
| 20120147505 | CAPACITANCE CHECK AND VOLTAGE MONITORING CIRCUIT FOR USE WITH A CIRCUIT PROTECTION DEVICE - A circuit protection device includes a plasma gun, at least one capacitor communicatively coupled to the plasma gun, and a monitoring circuit communicatively coupled to the at least one capacitor. The capacitor is configured to store electrical energy and to provide the electrical energy to the plasma gun. The monitoring circuit is configured to measure a charge property of the at least one capacitor, determine a charge status of the at least one capacitor based on the measured charge property, and output at least one signal indicative of the charge status. | 06-14-2012 |
| 20130050878 | DIFFERENTIAL TEMPERATURE MONITORING OF ELECTRICAL DEVICES - Systems, methods and devices for monitoring temperature are presented herein. A method of monitoring temperature in a system, such as a capacitor bank, is disclosed. The method may include: receiving first device temperature signals indicative of the temperature of a first device over a predetermined period of time; receiving second device temperature signals indicative of the temperature of a second device over a predetermined period of time; determining a first rolling average temperature for the predetermined period of time from the first device temperature signals; determining a second rolling average temperature for the predetermined period of time from the second temperature signals; and triggering a disconnect event in response to a determination that either the first or the second rolling average temperature is greater than a predetermined maximum working temperature. | 02-28-2013 |
| 20130128393 | Method And Arrangement For Capacitor Bank Protection - A method for protecting against a failure within a multi-phase capacitor bank including a plurality of capacitor units each including a plurality of capacitor elements connected to each other, wherein capacitor units are connected to each other and the failure may involve two neighboring capacitor units. The method includes steps of measuring the current of each individual phase of the capacitor bank, calculating the magnitude of an unbalanced current based on the measured currents, measuring the voltage of each individual phase of the capacitor bank, calculating the magnitude of an unbalanced voltage based on the measured voltages, determining an operating point based on the calculated magnitudes of the unbalanced current and the unbalanced voltage, examining where the defined operating point is located in a specified operating region, and initializing a trip signal based on the location of the defined operating point in the specified operating region. | 05-23-2013 |
| 20130188283 | PROTECTION MANAGEMENT OF SUPER CAPACITATORS - A method for protecting a super capacitor includes monitoring a charge level of the capacitor, monitoring a temperature of the capacitor, discharging the capacitor when the temperature is above a predetermined level, or discharging the capacitor down to a predetermined level when the capacitor has stayed charged over said level longer than a predetermined period, and directing the discharged power from the capacitor to a cooling device for cooling the capacitor. Also, a super capacitor system includes at least one super capacitor, a control unit and sensor for monitoring the temperature and the charge level of the capacitor. The system further includes a cooling device connected to the super capacitor for cooling the capacitor. | 07-25-2013 |
| 361016000 | Series connected capacitors | 6 |
| 20090147411 | THYRISTOR CONTROLLED SERIES CAPACITOR MODULE - A thyristor controlled series capacitor module including a capacitor connectable in series with a power line, a thyristor valve connected in parallel with the capacitor, a breaker connected in parallel with the thyristor valve, and an inductor. By providing a simplified breaker arrangement, the number of components is reduced. | 06-11-2009 |
| 20090190273 | Ultracapacitor Overvoltage Protection Circuit With Self Verification - A system and method for protecting a hybrid electric vehicle propulsion energy storage pack from an overvoltage condition is described. The energy storage pack includes a plurality of energy storage cells electrically connected in series and electrically coupled with a vehicle direct current (DC) bus. The system includes one or more overvoltage detection circuits, a disconnect circuit and one or more connection verification circuits. The one or more voltage detection circuits detect an overvoltage condition across a subset of the plurality of energy storage cells. The disconnect circuit electrically decouples the energy storage pack from the DC power bus upon detection of an overvoltage condition across the subset of the plurality of energy storage cells. The one or more connection verification circuits verify that the overvoltage detection circuit is electrically coupled to the subset of the plurality of energy storage cells. | 07-30-2009 |
| 20090213504 | Method And Arrangement For Triggering A Series Spark Gap - A series spark gap is triggered such that in parallel with partial spark gaps ( | 08-27-2009 |
| 20100085667 | CIRCUIT ARRANGEMENT COMPRISING AT LEAST TWO CAPACITORS CONNECTED IN SERIES - A circuit arrangement including at least two capacitors that are connected in series to a voltage is provided. The circuit arrangement also includes a voltage divider, arranged in parallel to the at least two capacitors, the voltage divider divides the voltage to the at least two capacitors, and a protective diode arranged in parallel to every capacitor in series to a series resistance in such a manner that the threshold voltage of the protective diode is lower than the admissible voltage of the capacitor arranged in parallel to the protective diode. In addition a protective circuit is arranged in parallel to the series resistances. | 04-08-2010 |
| 20130215535 | ENERGY STORAGE SUBSYSTEM FOR VEHICLES, COMPRISING AT LEAST ONE SUPERCAPACITOR MODULE, ENERGY STORAGE SYSTEM COMPRISING SUCH A SUBSYSTEM AND RAIL VEHICLE COMPRISING SUCH A SYSTEM - An energy storage subsystem includes a metal casing and an electrical storage system mechanically fastened within the metal casing and including at least one super-capacitor module having a plurality of super-capacitors linked together in series. The subsystem includes at least one electrical protection device configured to open an electrical circuit to link electrical ground to either the metal casing or the super-capacitor module. | 08-22-2013 |
| 20160156178 | ESD PROTECTION CIRCUIT AND RF SWITCH | 06-02-2016 |
| 361017000 | Shunt connected capacitors | 1 |
| 20160094026 | OVERVOLTAGE PROTECTION DEVICE AND METHOD - A protection device is provided that exhibits a turn on time of order of one nanosecond or less. Such a device provides enhanced protection for integrated circuits against electrostatic discharge events. This in turn reduces the risk of device failure in use. The protection device can include a bipolar transistor structure connected between a node to be protected and a discharge path. | 03-31-2016 |
