Abstract: A system for use in a wellbore can include a supercapacitor health measurement device including circuitry for determining a capacitance of a supercapacitor that is positionable in the wellbore. The supercapacitor health measurement device can also include circuitry for determining an equivalent series resistance (ESR) value of the supercapacitor. The supercapacitor health measurement device can further include circuitry for transmitting the capacitance and the ESR value. The system can also include a remote device that is positionable aboveground for receiving the capacitance and ESR value.

Abstract: An electronic device may include a battery charger and a controller. The battery charger may receive a voltage from an energy source, and may provide an output power. The controller may receive a voltage value of the energy source, may receive a current value from the battery charger or the energy source, may determine a power value based on the received voltage value and the received current value, and may provide at least one control signal to the battery charger to change the output power of the charger.

Abstract: A circuit for use with an external power source and at least one load. The circuit includes a Hydro-Pyroelectrodynamic (“H-PED”) storage/capture device (“SCD”), a plurality of contacts, and a recharging device. The H-PED SCD stores electrical energy and is configured to discharge power to at least one output contact of the plurality of contacts. The plurality of contacts also include an input contact configured to be connected to the external power source. The recharging device is configured to be powered by the external power source when the external power source is connected to the input contact and supplies power thereto. The recharging device is operable to charge the H-PED SCD when powered by the external power source. The recharging device may be an infrared light emitting diode configured to generate incident infrared radiation operable to charge the H-PED SCD.

Abstract: A battery module includes a crystal lattice type battery, a detection circuit, a control circuit and an excitation circuit. The detection circuit is electrically coupled to the battery. The control circuit is electrically coupled to the detection circuit. The excitation circuit is electrically coupled to the control circuit and the battery. When the battery is charged or discharged, the detection circuit is configured to detect an impedance of the battery. The control circuit is configured to compare the impedance and a threshold. And the control circuit is configured to produce a control signal. The excitation circuit is configured to selectively provide an excitation signal to the battery according to the control signal.

Abstract: A charge injection compensation circuit compensates for charge injection by a field-effect transistor (FET) switch regardless of a supply voltage. The charge injection compensation circuit includes a main switch that injects charge into an electronic circuit when switched off, and a charge storage device that stores the injected charge until it can be dissipated to a dissipating node. Upon the main switch being controlled to switch off, a pulse generator circuit controls a charge storage switch to switch on to transfer the charge injected from the main switch to the charge storage device and then switch off. A dissipation circuit dissipates the charge from the charge storage device to a dissipating node.

Abstract: In a system that shares a battery with an external device, the system includes a power storage device connected to the battery via a power supply line. The system includes a switch provided on the power supply line, and a control unit. The control unit controls on-off switching operations of the switch to selectively establish an electrical conduction between the battery and the power storage device or interrupt the electrical conduction therebetween. The battery has a battery voltage thereacross, and the power storage device has a power-storage voltage thereacross. The battery charges the power storage device while the electrical conduction is established so that the power-storage voltage follows the battery voltage. The control unit turns off the switch when the battery voltage is in a predetermined insufficient voltage state to prevent electrical power charged in the power storage device from being discharged to the battery.

Abstract: An adapter for a power tool including a housing, a tool-side connector, and a battery-side connector in electrical communication with each other. The tool-side connector is configured to couple to a power tool, and the battery-side connector is configured to couple to a battery pack. The adapter also includes a communication interface configured to couple with an external device, and a controller. The controller is configured to determine a state of the power tool, operate in a data transmission mode when the power tool is in the idle state, operate in a pass-through mode when the power tool is in the active state, and switch between the data transmission mode and the pass-through mode based on the state of the power tool.

Abstract: A pre-charging switch arrangement for charging a capacitor of a direct-current circuit is disclosed. The pre-charging switch arrangement has a pre-charging resistor, a pre-charging switch, and a voltage detection device connected to the pre-charging resistor and detecting a voltage across the pre-charging resistor.

Abstract: An apparatus for power transformation includes a power converter having a charge pump, a first regulator that regulates the power provided by the power converter, and a magnetic filter connected to a terminal of the charge pump. The particular terminal to which the magnetic filter is connected is selected to facilitate adiabatic inter-capacitor charge transport within the charge pump.

Abstract: A single friction surface microgenerator and a method of manufacturing the same are described. The microgenerator comprises an insulating substrate with a surface-friction-structured layer on its upper surface and a first induction electrode and a second induction electrode on its lower surface. The first induction electrode is located to correspond to the surface-friction-structured layer that is used as a friction surface while the second induction electrode is located periphery of the first induction electrode and insulatedly spaced from the first induction electrode. The single friction surface microgenerator according to the present disclosure has a wide usage and the method of manufacturing the same may be performed through a simply and high-effective production process, processed at low cost, and may achieve high yield.

Abstract: A system and method manages power in a wireless micro-sensor having a self-contained energy source. The system and method identify the rated capacity of the self-contained energy course by processing an identification value of the self-contained energy source and measuring the temperature of the self-contained energy source over time. The system and method determine temperature trends, measure the depth of discharge of the self-contained energy source, and control the asynchronous transmission of the micro-sensor. The transmission occurs in response to the measured temperatures, the determined temperature trend, and the depth of discharge of the self-contained energy source.

Abstract: A motor driving circuit includes a first output switch, a second output switch, a first adjusting module, and a second adjusting module. A rising slew rate of the first output current along the first direction is adjusted according to the first adjusting parameter of the first adjusting module. A falling slew rate of the first output current along the first direction is adjusted according to the second adjusting parameter of the second adjusting module.

Abstract: The embodiment of the present invention discloses a loop compensation circuit and a switching power supply circuit. The loop compensation circuit can comprise: a voltage detection circuit, a control chip and a RC circuit, and the voltage detection circuit is coupled to a voltage generation circuit, and employed to detect a variation of an output voltage of the voltage generation circuit; the control chip is respectively coupled to the voltage detection circuit and the RC circuit, and employed to detect a response speed of the loop compensation circuit and to adjust a parameter of the RC circuit according to the response speed of the loop compensation circuit and the variation of the output voltage of the voltage generation circuit for adjusting the response speed of the loop compensation circuit.

Abstract: Circuits comprising at least one energy storage device, a resistor and switch arranged in series with the resistor are described. The energy storage device is arranged in parallel with the series connection of the switch and the resistor, and the switch is arranged to selectively switch the resistor into a parallel connection to the energy storage device. In some examples, the switch comprises a series connection of semiconductor switching elements. In some examples, the circuit may comprise a sub-module for use in a multilevel modular converter.

Abstract: An electric storage device includes a first electric capacitor, a second electric capacitor, a converter, and a processor. The converter converts electric power transmitted between an external power system external to the electric storage device and at least one of the first electric capacitor and second electric capacitor. The processor is configured to control the converter to operate in at least one of a first mode and a second mode, the first electric capacitor continuously discharging electric power to the external power system in the first mode, the second electric capacitor discharging electric power to the external power system and being charged by the external power system, intermittently, to stabilize frequencies in the external power system in the second mode.

Abstract: A vehicle includes: at least one rotary electric machine; an inverter that drives the rotary electric machine; a capacitor connected between a paired electric power lines that is connected to the inverter; and a control unit. When a vehicle collision is detected, the control unit executes first control for discharging electric charges stored in the capacitor by performing a switching operation of the inverter so as to prevent a flow of a q-axis current but cause a flow of a d-axis current to the rotary electric machine. The control unit stops the first control in a specified case and executes second control for performing the switching operation of the inverter so as to reduce the current flowing through the rotary electric machine to be lower than that during execution of the first control. The control unit executes third control for shutting down the inverter after execution of the second control.

Abstract: Embodiments herein provide electronic devices that include a charge pump coupled to a split reservoir capacitor which includes at least two discrete capacitors. Further, the discrete capacitors are coupled together by a switch (e.g., a transistor) which is controlled by an output regulator. In one embodiment, the output regulator monitors an output voltage of the charge pump and the split reservoir capacitor to determine when the output differs from a predetermined target voltage. When the switch isolates the two capacitors, the charge pump can continue to add charge to a first one of the discrete capacitors. Thus, when the output regulator detects a dip in the output voltage and activates the switch to reconnect the two discrete capacitors, the first discrete capacitor has extra charge which can decrease the time needed to bring the output voltage back to the target voltage.

Abstract: The disclosure describes a charge device capable of charging electricity storage cells while eliminating a voltage variation among the electricity storage cells without a need for at least a circuit section playing a role in voltage equalization among the electricity storage cells to be designed to have a large current capacity, and describes a charge-discharge device constructed by additionally equipping a discharging function with the charge device. Provided are a charge device and a charge-discharge device each of which comprises a convertor, an input circuit, and a multi-stage voltage doubler rectifier circuit. An element in the convertor configured to be applied with a rectangular waveform voltage is connected to the multi-stage voltage doubler rectifier circuit via the input circuit to thereby realize a voltage equalization function, and an output section of the convertor is connected to the multi-stage voltage doubler rectifier circuit to thereby realize a charging-discharging function.

Abstract: A protection circuit applied to an alternating current (AC) power source includes a sample-and-hold unit, a detection unit, and a discharge signal generation unit. The sample-and-hold unit samples a peak value of a direct current (DC) voltage during each period of a corresponding AC voltage, wherein the AC power source provides the AC voltage. The detection unit generates a detection signal when the DC voltage crosses a reference voltage corresponding to the peak value. The discharge signal generation unit generates a count signal when the discharge signal generation unit does not receive the detection signal within a predetermined time of a period of the AC voltage, accumulates the count signal, and generates a discharge signal to a discharge unit when a number of accumulated count signals is greater than a predetermined value, wherein the discharge unit discharges an X capacitor according to the discharge signal.

Abstract: An illustrative converter embodiment employs an oscillator comprising a capacitor and a comparator. The capacitor is alternately coupled to a charging current source and a discharging current source, the charging current source operating to charge the capacitor at a first rate and the discharging source operating to discharge the capacitor at a second rate. The comparator asserts an output signal when the capacitor charges to a first threshold voltage and deasserts the output signal when the capacitor discharges to a second threshold voltage. The first rate may be proportional to the input voltage and the second rate may be fixed. The output signal may be applied to the gate of a transistor to alternately apply the input voltage across an inductor and to apply current from the inductor to a capacitance. The duty cycle of the output signal is inversely proportional to the input voltage, or at least approximately so.

Abstract: A generator includes a first member, a second member and a sliding mechanism. The first member includes a first electrode and a first dielectric layer affixed to the first electrode. The first dielectric layer includes a first material that has a first rating on a triboelectric series. The second member includes a second material that has a second rating on the triboelectric series that is different from the first rating. The second member includes a second electrode. The second member is disposed adjacent to the first dielectric layer so that the first dielectric layer is disposed between the first electrode and the second electrode. The sliding mechanism is configured to cause relative lateral movement between the first member and the second member, thereby generating an electric potential imbalance between the first electrode and the second electrode.

Abstract: An oscillation circuit for generating a clock signal of a switching power supply circuit is provided. The oscillation circuit includes a circuit configured to perform frequency spreading control of the clock signal in synchronization with an output operation control signal for periodically turning on/off an output operation of the switching power supply circuit.

Abstract: A charging system for an electric vehicle and an electric vehicle including the same are provided. The charging system includes: a power battery; a first charging interface and a second charging interface connected with an external power source respectively; a first charging control branch connected between the power battery and the first charging interface, and a second charging control branch connected between the power battery and the second charging interface; and a controller connected with the first charging interface and the second charging interface respectively.

Abstract: The disclosure provides embodiments of a self-contained automatic battery charging system having a power printed circuit board (PCB) that enables inputting an alternating current (AC) power flow to the automatic battery charging system. A first switchmode converter converts an AC input power to a direct current (DC) power, thereby providing an active power factor correction. The first switchmode converter comprises an isolation transformer, which provides an electrical isolation between a primary circuitry and a secondary circuitry of the automatic battery charging system. A second switch mode converter regulates a system output voltage and limits a system output current to an electrical load. A DC output is connected to a battery, another electrical storage device, and/or a parallel-connected DC load to be powered.

Abstract: An energy supply unit for supplying a consumer, includes an energy store to supply electric when the consumer is decoupled from an energy supply network. The energy supply unit includes an energy supply controller having an input coupled to the energy store, via a diode, for receiving electric energy and an output for delivering electric energy, and a monitoring unit for outputting a monitoring signal, configured to set the monitoring signal to an active state when an output voltage between the output and a reference potential is lower/greater than a predefined activation threshold value, the monitoring unit configured, when an excessively low input voltage is identified between the input and reference potential of the controller, especially paired with an excessively low output voltage, the monitoring signal is switched to the inactive state when the input voltage is above a reset threshold and the output voltage is within the monitoring band.

Abstract: Systems of a vehicle for sharing vehicle controls are provided. One system includes an on-board computer that is part of the vehicle and communications circuity having connection to the on-board computer. The communications circuitry is configured to interface with a wireless network for accessing the Internet. The on-board computer is configured to execute instructions for enabling wireless connection to portable devices that enter the vehicle and are provided with access to said wireless connection. Vehicle electronics are interfaced with one or more vehicle systems and the on-board computer. The on-board computer is configured to provide access to at least one graphical user interface to the portable device via the wireless connection. The at least one graphical user interface includes input options that enable control for features of a vehicle system of the vehicle.

Abstract: A control circuit includes a first integrator circuit corresponding to a first mode and a second integrator circuit corresponding to a second mode. The control circuit is configured to transition control of the power converter between the first mode and the second mode such that one of the first mode and the second mode is a controlling mode for a period of time and the other one of the first mode and the second mode is a non-controlling mode for the period of time, and set an output of the first integrator circuit or the second integrator circuit corresponding to the non-controlling mode to equal an output of the first integrator circuit or the second integrator circuit corresponding to the controlling mode. Other example control circuits, power converters including a control circuit, and methods for controlling a power converter are also disclosed.

Abstract: A discharging circuit for a power supply includes a rectifying circuit for coupling to an input filter capacitor coupled to an AC input voltage for providing a rectified AC voltage. A discharge resistor is coupled to the rectifying circuit, and a power switch and a discharging current source are coupled in series with the discharging resistor. A discharge control circuit is coupled to the discharge resistor for providing a discharge signal to cause the power switch to turn on for discharging the capacitor using the discharging current source. The discharging control circuit includes an AC voltage sampling circuit for providing a sampled rectified voltage, a signal-shaping circuit for providing a time-varying signal derived from the sampled rectified voltage, a comparator circuit for comparing the sampled rectified voltage and the time-varying signal, and a counter circuit for providing the discharge signal in response to an output of the comparator circuit.

Abstract: An apparatus for performing signal driving in an electronic device may include a decoupling capacitor and at least one switching unit (e.g. one or more switching units). The decoupling capacitor may have a first terminal and a second terminal, and may be positioned in an output stage within the electronic device and coupled between a first predetermined voltage level and another predetermined voltage level, where the apparatus may perform signal driving with aid of the output stage. In addition, the aforementioned at least one switching unit may be coupled between one terminal of the first and the second terminals of the decoupling capacitor and at least one of the first predetermined voltage level and the other predetermined voltage level, and may be arranged for selectively disabling the decoupling capacitor.

Abstract: A split drive transformer (SDT) and use of such a transformer in a power converter is described. The power converter includes a power and distributor circuit configured to receive one or more input signals and provides multiple signals to a first side of the SDT. The SDT receives the signals provided to the first side thereof and provides signals at a second side thereof to a power combiner and rectifier circuit which is configured to provide output signals to a load. In some embodiments, the SDT may be provided as a switched-capacitor (SC) SDT. In some embodiments, the power converter may optionally include a level selection circuit (LSC) on one or both of the distributor and combiner sides.

Abstract: A circuit arrangement (1) for operating an electric machine. The circuit arrangement (1) includes at least one high-voltage half-bridge circuit (2), which has a high-side semiconductor switch (3) and a low-side semiconductor switch (4). In each case one gate driver (5, 6) is assigned to the semiconductor switches (3, 4) for actuating said semiconductor switches, and includes a low-voltage controller (7), which actuates the gate drivers (5, 6). A high-voltage controller (11) senses output signals (AS) of the gate drivers (5, 6) and transmits at least the sensed output signals (AS) to the low-voltage controller (7) using a data bus (12).

Abstract: A method for inspecting a battery, comprising: a first withstanding voltage determination step of housing an electrode laminate within a package and applying a first voltage between a positive electrode terminal and a negative electrode terminal to perform a first withstanding voltage determination in a state in which an electrolyte solution is not poured in the package; and a second withstanding voltage determination step of applying a second voltage which is higher than the first voltage between the positive electrode terminal or the negative electrode terminal and metallic layers of pair of laminate films to perform a second withstanding voltage determination in the state in which the electrolyte solution is not poured in the package.

Abstract: A system for detecting a decrease in or loss of an input phase to a motor. A power rectifier rectifies and combines three input voltages to produce an output voltage to power the motor. A PFC circuit manages the power flowing to the motor. A sensing circuit located between the power rectifier and the PFC senses a voltage level of the power rectifier's output voltage. Alternatively, a sensing rectifier is connected before the power rectifier, and the sensing circuit senses the voltage level of the sensing rectifier's output voltage. A microprocessor compares the sensed voltage level to a threshold voltage level which is indicative of the decrease in or loss of one of the three input voltages, and if the former drops below the latter, then the microprocessor sends a signal to either shut off the motor or cause the PFC circuit to reduce the power flowing to the motor.

Abstract: A charging system for an electric vehicle and an electric vehicle are provided. The charging system comprises: a power battery; a charge-discharge socket; a bidirectional DC/DC module having a first DC terminal connected with a first terminal of the power battery and a second DC terminal connected with a second terminal of the power battery; a bidirectional DC/AC module having a first DC terminal connected with the second terminal of the power battery and a second DC terminal connected with the first terminal of the power battery; a charge-discharge control module having a first terminal connected with the AC terminal of the bidirectional DC/AC module and a second terminal connected with the charge-discharge socket; and a controller module connected with the charge-discharge control module, and configured to control the charge-discharge control module according to a current operation mode of the charging system.

Abstract: A method and system for management of electric charges of cells of an electricity storage battery, which are electrically connected in series and/or in parallel, the method including: balancing states of charge of the cells, performed only during a battery charging phase; and balancing quantities of charge contained in the cells, performed only during a battery discharging or rest phase.

Abstract: A system for testing over-current fault detection includes a first switch to connect a voltage to a load, a capacitor connected between the first switch and ground, a monitor circuit that monitors a current from the first switch to the load, and a microcontroller configured to detect an over-current fault condition based upon input from the monitor circuit. The microcontroller controls the state of the first switch to connect voltage to the load and verifies over-current detection based upon current generated during charging of the capacitor.

Abstract: A DC/DC converter converts an input DC voltage to an output DC voltage and charges a battery. The DC/DC converter includes: a DC/DC controller, operable for generating a driving signal according to a target value for the output voltage and a first detection signal indicative of the output voltage level to control switching circuitry and to adjust the output voltage level; and a battery charging controller, coupled to the DC/DC controller and the battery, that is operable for receiving the first detection signal indicative of the output voltage level and a second detection signal indicative of a battery voltage level, and for generating a loop control signal according to the first detection signal and the second detection signal to adjust the target value for the output voltage, wherein the difference between the first detection signal and the second detection signal indicates the amount of a battery charging current.

Abstract: A piezo driver is described that is configured to furnish electric charge to a piezo component during a first operational state and configured to transfer electric charge from the piezo component to a passive energy storage component during a second operational state. In one or more implementations, the piezo driver includes a passive energy storage component configured to store electric charge. The piezo driver also includes a voltage converter configured to electrically connect between a piezo component and the passive energy storage component. The voltage converter is configured to furnish electric charge from the passive energy storage component to the piezo component during a first state of operation and configured to furnish electric charge from the piezo component to the passive energy storage component during a second state of operation.

Abstract: An electrical storage system includes electrical storage elements connected in series with each other and being charged or discharged; discharge circuits respectively connected in parallel with the electrical storage elements and discharging the corresponding electrical storage elements; and a controller controlling operations of the discharge circuits. The controller calculates a first SOC difference using a full charge capacity of each electrical storage element. The first SOC difference is a difference in SOC between the electrical storage elements and arises due to a difference in full charge capacity between the electrical storage elements. The controller calculates a second SOC difference that is a difference in SOC between the electrical storage elements at the moment the second SOC difference is calculated.

Abstract: The present disclosure provides an ionic liquid compound of Formula (I) and its application in reactions such as alkylation, arylation, acylation, diels alder and oligomerization, The present disclosure also provides a process for preparing the ionic liquid compound of Formula (I) which involves preparing an ionic salt complex represented by Formula [(NR1R2R3)iM1]n+[Xj]n? by mixing an amine represented by Formula NR1R2R3 and a metal salt represented by formula M1Xj; and mixing the ionic salt complex and a metal salt represented by formula M2Yk to obtain the ionic liquid compound.

Abstract: According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit.

Abstract: An electric drive system for an electric vehicle has a DC power source and a contactor with an output coupled to a main bus and an input adapted to be connected to the DC power source. The contactor is selectably switched between an open state and a closed state. A link capacitor is coupled to the main bus. A precharge circuit is coupled between the DC power source and the link capacitor comprised of a controlled current source. The controlled current source is selectably activated with the contactor in the open state to charge the link capacitor to a predetermined voltage to before switching the contactor to the closed state.

Abstract: Example embodiments of rapid charging power supply systems are disclosed herein. One example rapid charging power supply system comprises: a stationary rapid charger (11); a power supply switch (11m) for switching and supplying DC power from the stationary rapid charger (11) to either a first charging circuit (20A) for supplying the DC power to a first electric moving vehicle (50) or a second charging circuit (20B) for supplying the DC power to a second electric moving body (53); a stationary electric storage unit (15) capable of storing DC power from the first charging circuit (20A) and used for being directly supplied to at least the first electric moving body (50); and a power feeding controller (12) for stopping power supply to the stationary electric storage unit (15) when charging an on-vehicle electric storage unit (85) of the first electric moving body (50).

Abstract: A power conversion apparatus is provided. The power conversion apparatus receives an AC input power by an input side and includes a capacitor, an AC-to-DC conversion unit and a discharge unit. The capacitor is connected with the input side. The AC-to-DC conversion unit is coupled to the input side, and configured to convert the AC input power after receiving the AC input power to generate a DC output power. The discharge unit is coupled to the capacitor and has at least two switch elements. The discharge unit enables the at least two switch elements when supply of the AC input power is interrupted, such that one of a first discharge path and a second discharge path formed by the at least two switch elements is taken to discharge or drain the energy stored in the capacitor.

Abstract: An auto-resonant driver for a transmitter inductor drives the inductor at an optimal frequency for maximum efficiency. The transmitter inductor is magnetically coupled, but not physically coupled, to a receiver inductor, and the current generated by the receiver inductor is used to power a load. The system may be used, for example, to remotely charge a battery (as part of the load) or provide power to motors or circuits. A feedback circuit is used to generate the resonant driving frequency. A detector in the transmit side wirelessly detects whether there is sufficient current being generated in the receiver side to achieve regulation by a voltage regulator powering the load. This point is achieved when the transmitter inductor peak voltage suddenly increases as the driving pulse width is ramped up. At that point, the pulse width is held constant for optimal efficiency.

Abstract: An electromechanical polymer (EMP) sensor includes (a) a first set of EMP layers provided between a first electrode and a second electrode forming a capacitor, the first set of EMP layers having one or more EMP layers capable of being activated by application of a voltage across the first and second electrodes; and (b) a sensing circuit coupled to the first electrode and the second electrode for detecting a change in capacitance or a change in voltage across the first and second electrodes. The EMP sensor may further include means for disconnecting the second electrode from a ground reference after the pre-determined voltage is applied, such that the sensing circuit senses a change in capacitance. The sensing circuit may be capable of detecting a noise portion of a voltage across the first and second electrode.

Abstract: A method, device, and system for surge current protection on a circuit including a three-phase inverter and a capacitive load. The inverter can be controlled to connect the capacitive load with different direct current voltage potentials. In a pre-charging mode, the capacitive load is connected with the a first direct current voltage potential via a current-limiting element to limit a start-up current. In a normal operating mode following the pre-charging mode, the inverter is controlled to directly connect the capacitive load with the different direct current voltage potentials.

Abstract: A method and system of diagnosing a breakdown during pre-charging are provided. The method includes detecting, by a controller, an output voltage of a battery and pre-charging a capacitor of an inverter using energy from the battery. In addition, the controller is configured to measure a voltage applied to the capacitor of the inverter and detect an output current of the battery. A breakdown may then be detected by the controller by collating the detected output voltage, the voltage applied to the capacitor, and the detected output current.

Abstract: An integrated circuit (IC) for controlling the discharge of a capacitor coupled across first and second input terminals of a power converter circuit, wherein the first and second terminals for receiving an ac line voltage. The IC includes a switching element coupled across the first and second input terminals and a detector circuit. The detector circuit including first and second comparators that produce first and second output signals responsive to a zero-crossing event of the ac line voltage. The first and second output signals being used to generate a reset signal coupled to a timer circuit responsive to the zero-crossing event. When the reset signal is not received within a delay time period, the timer circuit outputs a discharge signal that turns the switching element on, thereby discharging the capacitor.

Abstract: A power transfer system transfers electric power from a power feeding device external to a vehicle to a power receiving device mounted on the vehicle in a contactless manner. The power feeding device includes a first reflective wall formed at a rear side of a transmitting coil with respect to a power transferring direction from the transmitting coil, to allow reflection of a magnetic flux output from the transmitting coil in the power transferring direction. The transmitting coil and the first reflective wall are arranged spaced apart from each other. The power receiving device includes a second reflective wall formed at a rear side of a receiving coil with respect to a power receiving direction from the transmitting coil, to allow reflection of a magnetic flux output from the transmitting coil to the receiving coil. The receiving coil and the second reflective wall are arranged spaced apart from each other.