Abstract: A method and apparatus for converting DC power to AC power. For example, apparatus for converting DC power to AC power comprises an input adapted to be coupled to a high-powered distributed generator having a maximum voltage at a first voltage and an arc fault mitigation device, coupled to the input, for providing a second voltage at the input that is lower than the first voltage, where a difference between the first voltage and the second voltage is not large enough to cause an arc.

Abstract: A motor drive or bus supply power conversion system includes a rectifier with at least one rectifier switch module for rectifying AC input power. A DC bus is connected to the rectifier and supplies DC output power. An optional inverter is connected to the DC bus and includes at least one inverter switch module for inverting the DC bus voltage to an AC output power. The at least one rectifier switch module and the at least one inverter switch module each include a base plate and a housing connected to the base plate. The housing defines an interior space that contains at least one semiconductor switch. A protective cover layer includes a corrosion protection material and divides the interior space into an inner sub-space located between the base plate and the protective cover layer and an outer sub-space located between the protective cover layer and the housing.

Abstract: To provide a power converter which can distribute heat generation of the switching devices with good accuracy, even when the maximum heating phase of the positive electrode side and the maximum heating phase of the negative electrode side are different phases, and even when the maximum heating phase of the positive electrode side and the maximum heating phase of the negative electrode side changes before and after combining the offset voltage. The power converter calculates the offset voltage that makes the positive electrode side maximum heating evaluation value and the negative electrode side maximum heating evaluation value coincide with each other, in a state of controlling on/off the switching devices based on the combined AC voltage commands of the offset voltage.

Abstract: A power converter can include a first line, a second line, a capacitor line disposed between the first line and the second line, a first capacitor and a second capacitor connected to the capacitor line in series between the first line and the second line, a midpoint line connected to a midpoint between the first capacitor and the second capacitor, and a protection circuit disposed between the first capacitor and the second capacitor and configured to provide protection to one or more portions of the power converter.

Abstract: A method for dynamic enhancement of loop response upon recovery from fault conditions includes detecting a fault condition in response to a programmed output voltage of a Pulse Width Modulation (PWM) converter decreasing below an input voltage of the PWM converter. A peak voltage is sampled at the end of at least one of a plurality of clock cycles of the PWM converter in response to detecting the fault condition, wherein the peak voltage is proportional to a sensed current conducted through a transistor. An error output of an error amplifier is preset to an error value determined by the peak voltage. A PWM driver is controlled with the error value to drive the transistor. An output load is charged to the programmed output voltage with the transistor in response to the input voltage increasing above the programmed output voltage.

Abstract: A method may include: applying a first voltage on at least one first terminal of a first direct current (DC) bus electrically connected to a power source, obtaining at least one indication that discharge of a second voltage related to the first voltage should be performed, and discharging the second voltage by electrically connecting at least one second terminal of a second DC bus to a ground in response to the at least one indication. Another method may include: injecting a current at at least one terminal of a direct current (DC) bus that is electrically connected to a power source, simultaneous to injecting the current, measuring an insulation relative to ground, obtaining an electrical parameter related to the power source, and, in response to the electrical parameter, maintaining the current injected at the terminal of the DC bus without ceasing the measuring of the insulation relative to a ground.

Abstract: A power supply circuit that generates an output voltage from an AC voltage inputted thereto. The power supply circuit includes a rectifier circuit rectifying the AC voltage, an inductor receiving a rectified voltage from the rectifier circuit, a transistor controlling an inductor current flowing through the inductor, and an integrated circuit switching the transistor based on the inductor current and the output voltage. The integrated circuit includes a sample-and-hold circuit that samples-and-holds a voltage corresponding to the rectified voltage in a predetermined timing, an output circuit that outputs a limit voltage based on the voltage held by the sample-and-hold circuit, indicating a limit value for limiting the inductor current, and a signal output circuit that receives the limit voltage and a voltage corresponding to the inductor current, to thereby output a signal to turn off the transistor upon determining that a current value of the inductor current exceeds the limit value.

Abstract: A power converter with over temperature protection compensation includes a main conversion unit, a primary-side control unit, a primary detection circuit, and an over temperature adjustment circuit. The primary-side control unit obtains a primary voltage change value through the primary detection circuit, and the primary-side control unit correspondingly provides a current change value to the over temperature adjustment circuit according to the primary voltage change value. The over temperature adjustment circuit provides a temperature control voltage according to the current change value so that the primary-side control unit determines whether an over temperature protection is activated according to the temperature control voltage.

Abstract: A power electronics converter may include a converter commutation cell having a power circuit and a gate driver circuit. The power circuit includes at least one power semiconductor switching element and at least one capacitor. Each power semiconductor switching element is included in a power semiconductor prepackage, each prepackage including one or more power semiconductor switching elements embedded in a solid insulating material, each power semiconductor switching element having at least three terminals including a gate terminal. The gate driver circuit is electrically connected to and configured to provide switching signals to the gate terminal of each of the at least one power semiconductor switching element. A peak rated power output of the power electronics converter is greater than 25 kW and a value of a converter parameter ? is less than or equal to 5 pHm3.

Abstract: An electronics (100) configured to determine an input voltage to a galvanic isolation point of the electronics (100) is provided. The electronics (100) comprises an isolation transformer (120) configured to conduct a primary current (Ip) provided by an input voltage source (110), and provide a secondary voltage (Vs), the secondary voltage (Vs) being proportional to a primary voltage (Vp) induced by the primary current (Ip). The electronics (100) also comprises a peak detection circuit (130) coupled to the isolation transformer (120), the peak detection circuit (130) being configured to receive the secondary voltage (Vs) and, based on the secondary voltage (Vs), provide a signal that is proportional to the primary voltage (Vp).

Abstract: A power converter includes an arm in which a plurality of converter cells are connected in series, each of the converter cells including at least two switching elements, a power storage element, and a pair of output terminals. A control device controls the power converter. The converter cell includes a switch to have the converter cell bypassed. When the control device senses failure of the converter cell, it has the failed converter cell within the arm bypassed and controls a normal converter cell within the arm to suppress a ratio of a harmonic component in an arm current that increases due to the failure.

Abstract: An electric power supply includes a totem pole bridgeless PFC power converter. The PFC power converter includes an input for coupling to an AC power source, an output, four switching devices coupled between the input and the output, two diodes coupled between the four switching devices and the input, a first inductor coupled between the four switching devices and the two diodes, and a second inductor coupled between the two diodes and the input. Other example electric power supplies and totem pole bridgeless PFC power converters are also disclosed.

Abstract: A power system including an inverter comprising an LCL filter is disclosed. The LCL filter includes a first inductor, a capacitor, and a second inductor. The power system further includes a controller. The controller is configured to determine an electrical characteristic of an output of the inverter. It is further configured to, based at least in part on the determined characteristic of the output of the inverter, dynamically adjust damping of the LCL filter.

Abstract: An apparatus includes a control circuit and a voltage regulator circuit coupled to a regulated power supply node. The voltage regulator circuit is configured to generate a power signal on the regulated power supply node using a reference voltage level. The apparatus further includes a control circuit that is configured to determine an operating mode using results of a comparison of a threshold value and a load current being drawn from the regulated power supply node by a load circuit. The control circuit may be further configured to set, in a first operating mode, the reference voltage level independently of the load current, and set, in a second operating mode, the reference voltage level using the load current.

Abstract: A current going through the first power semiconductor is sensed by a first and a second current derivative sensing means, the current going through the second semiconductor is sensed by a third and a fourth current derivative sensing means, when the current going through the first power semiconductor increases, the first current derivative means providing a positive voltage and the second current derivative means providing an opposite negative voltage, when the current going through the second power semiconductor increases, the third current derivative means providing a positive voltage and the fourth current derivative means providing an opposite voltage and the system reduces the voltage on the gate of the first power semiconductor if the first and third current derivative means provide voltages of same sign and reduces the voltage on the gate of the second power semiconductor if the second and fourth current derivative means provide voltages of same sign.

Abstract: An example electrical system is disclosed. The electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to an electric machine. A switch can be disposed between the plurality of machine windings and an output load. The switch is configured to transition between a closed state to allow current flow from the RESS through the inverter and the plurality of machine windings to the output load and an open state to prevent current flow to the output load.

Abstract: A Buck-Boost converter includes an input node to receive a supply voltage and a supply current, an output node, an inductor, capacitors including a load capacitor and a helper capacitor, and transistors to configure the Buck-Boost converter to: when the supply voltage is turning ON, operate in a Buck mode to (a) in a first cycle, use the supply current to charge the capacitors and an inductor magnetic field, and (b) in a second cycle, without using the supply current, discharge the inductor and the capacitors through the output node, to limit an inrush current; and when the supply voltage is turning OFF, operate in a Boost mode to (c) in a third cycle, cause the helper capacitor, but not the load capacitor, to charge the magnetic field, and (d) in a fourth cycle, discharge the inductor, and the capacitors, through the output node, to extend a voltage hold-up time.

Abstract: A rotating machine power conversion device is obtained which achieves operational continuation in a rotational speed range in which the operational continuation is enabled, even when a single phase of an electrical power conversion device made of switching devices causes a disconnection or turn-off failure. The rotating machine power conversion device comprises: a normality-case/abnormality-case current control device selection device for transferring between a normality-case current control device and an abnormality-case current control device in accordance with a determination result of an abnormality determination device; and an abnormality-case current control device/power conversion halt device selection device, using a rotational speed calculation device, for transferring between the abnormality-case current control device used when a rotational speed is lower than that being prespecified, and the power conversion halt device used when a rotational speed is higher than that being prespecified.

Abstract: The present disclosure aims to avoid a situation where a drive unit to be used for precharge does not drive due to a drop in power supply voltage. The power supply device is provided with the first voltage conversion unit and the control unit. The first voltage conversion unit performs a third voltage conversion operation in which a voltage applied to a second conductive path is boosted and an output voltage is output to a first conductive path to which a capacitive component is electrically connected. The control unit supplies the third control signal to only some of the plurality of first voltage conversion units, thereby causing the some of the first voltage conversion units to perform the third voltage conversion operation.

Abstract: A power supply includes a second capacitor, an overcharge suppression circuit, a power supply circuit, and a controller. The controller includes: an overcharge suppression control circuit that controls the overcharge suppression circuit in accordance with a magnitude of a voltage of the second capacitor; and a resistance switching circuit that changes a resistance value of the current-limiting resistance circuit depending on whether a gate block state occurs or not and in accordance with a magnitude of the voltage of the first capacitor. In the gate block state, each of the switching elements is fixed in a non-conductive state.