Abstract: In an inverter that includes a smoothing capacitor and a plurality of power modules, the smoothing capacitor includes a plurality of columnar unit capacitors each having electrodes at both ends thereof, a one-end-side bus plate connected to the electrode at one end of each unit capacitor, and an other-end-side bus plate connected to the electrode at the other end of the unit capacitor. The unit capacitors are arranged, with axes thereof parallel to each other, side by side in a direction perpendicular to the axes. The power modules are arranged at positions equally distant from a center of the inverter and equally distant from the smoothing capacitor.

Abstract: One aspect of an inverter device of the present disclosure includes a capacitor module having a capacitor element and a capacitor case that houses the capacitor element, and a housing having a housing space for housing the capacitor module. The housing includes a wall portion that is provided with a flow path through which a refrigerant flows and a first opening portion that allows a part of the flow path to open toward the housing space. The capacitor case includes a heat transfer portion that is made of metal and configured to cover the first opening portion. The refrigerant flows between an inner wall surface of the first opening portion and the heat transfer portion.

Abstract: A voltage dividing capacitor circuit includes first capacitor through third capacitor dividers and first through fourth load capacitors. The first capacitor divider includes a first flying capacitor and a plurality of first switches connected in series between a first voltage node and a ground node, and is connected to a second voltage node. The second capacitor divider is connected to the first voltage node, the second voltage node, and a first intermediate voltage node. The third capacitor divider is connected to the second voltage node, the ground voltage node, and a second intermediate voltage node. The first through fourth load capacitors are connected in series between the first voltage node and the ground node. The second capacitor divider includes a second flying capacitor and a plurality of second switches connected in series between the first voltage node and the second voltage node.

Abstract: A motor includes a rotor, a stator, a bearing, a motor housing, a bearing holder, and a bus bar. The rotor includes an axially extending shaft. The stator radially opposes the rotor. The bearing rotatably supports the shaft. The motor housing accommodates the stator and opens to one axial side. The bearing holder holds the bearing and covers the opening of the motor housing. The bus bar is connected to the conductive wire drawn out from the stator and is located on the bearing holder. The bearing holder includes a recess radially outside of the bearing and including an upper surface recessed to the other axial side. The bus bar includes a base portion and a connection portion. The base portion is located radially outside of the recess and extends in the circumferential direction.

Abstract: Provided are a power supply circuit and a transmitting device that can achieve lowering of power supply voltage. Provided is a power supply circuit including a current feedback unit, in which the current feedback unit has two p-type MOS transistors, a control element, and a first resistor, the two p-type MOS transistors and the control element configure a current turnback circuit that turns back the current, current substantially the same as the reference current in the circuit flows through the control element and the first resistor, and the output voltage is determined at least depending on the first resistor and the reference current.

Abstract: Power converter circuits and methods that include self-timed bootstrap capacitor power sources. Added to a power converter having a diode stack for charging bootstrap capacitors are three types of supplemental circuit blocks: a trigger block, a trigger-bypass block, and a bypass block. In operation, adjacent supplemental circuit blocks work in pairs. The upper block of the pair functions, when triggered, to charge an associated bootstrap capacitor by connecting the top plate of its associated bootstrap capacitor to the top plate of the bootstrap capacitor associated with the lower block of the pair, essentially bypassing the diode associated with the upper block. In addition, the lower block of the pair functions to initiate (trigger) the bypass function of the upper block. The bypass function of the upper block automatically terminates when the connected bootstrap capacitors are disconnected and their respective voltages “fly” apart, or is controllably terminated.

Abstract: A hollow shaft motor includes: a motor housing 11 having a cylindrical shape; a housing cover assembly 12 coupled to an upper portion of the motor housing 11; a rear cover 15 coupled to a lower portion of the motor housing 11; a stator assembly 20 located in the motor housing 11 and in a lower portion of the housing cover assembly 12; and a rotor assembly 30 located in the stator assembly 20 to rotate.

Abstract: A flying capacitor switching cell-system includes at least two flying capacitor switching cells, wherein each of the cells comprises an arrangement of at least one semiconductor system, and wherein the cells are in parallel in an electrical circuit.

Abstract: A method and system for balancing output currents of parallel connected first and second DC/DC converters is provided. In operation, the first converter (i) receives, via a communications line connected between the converters such as a CAN bus, a value of the output current of the second converter and (ii) uses this value in weighing an output voltage comparison performed by the first converter for generating the output current of the first converter to thereby adjust the output current of the first converter based on this value. Likewise, the second converter (i) receives, via the communications line, a value of the output current of the first converter and (ii) uses this value in weighing an output voltage comparison performed by the second converter for generating the output current of the second converter to thereby adjust the output current of the second converter based on this value.

Abstract: A multi-stage amplifier circuit includes: a front stage amplification circuit, for generating a front stage amplification signal according to a difference between a primary reference signal and a primary feedback signal; an output adjustment circuit, for generating a driving signal according to the front stage amplification signal; and an output transistor, controlled by the driving signal to generate an output signal. The output adjustment circuit includes: an adjustment transistor biased by a differential current of the front stage amplification signal; and an impedance adjustment device biased by the differential current. A resistance of the impedance adjustment device is determined by a difference between an adjustment feedback signal and an adjustment reference signal. The driving signal is determined by a product of a resistance of the impedance adjustment device multiplied by the differential current of the front stage amplification signal, and a drain-source voltage of the adjustment transistor.

Abstract: A multi-phase power converter with current matching is provided. The apparatus may include a control circuit to control a first phase of a power converter having a plurality of phases, and a phase matching circuit. The phase matching circuit may remove a DC component from an output ripple voltage of the converter, detect when respective ones of the plurality of phases begins generating its respective phase current and output a phase detector signal, extract a signal proportional to the first phase current and a signal proportional to either the remaining or total phase currents, output first and second voltages respectively proportional to the average of the first phase current and the remaining or total phase current, and output a corrective signal based on the difference between the first and second voltage. The control circuit may control the first phase based on the corrective signal.

Abstract: An electrical circuit for reducing electromagnetic noise or interference in a power converter. The circuit includes at least one shunt capacitor arranged to connect with a grounded component of the power converter, wherein the at least one shunt capacitor is further arranged to be driven by an active control signal so as to sink a noise current originating from a noise source to the grounded component of the power converter, wherein the noise source is connected to the grounded component via a capacitive path formed by at least one stray capacitors.

Abstract: A multi-level inverter having one or more banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.

Abstract: Provided is a semiconductor device that carries current in both directions and that enables accurate detection of current flowing through the semiconductor device. The semiconductor device includes a transistor and a diode both formed in a common semiconductor base body. The semiconductor device includes: a first main surface; a second main surface; a first electrode; a second electrode; a third electrode for current sensing; and a fourth electrode for current sensing. The semiconductor base body includes: a transistor region in which the transistor is formed; a diode region in which the diode is formed; and a separation region formed between the transistor region and the diode region. The third electrode is provided on the first main surface in the transistor region at a distance from the first electrode. The fourth electrode is provided on the first main surface in the diode region at a distance from the first electrode.

Abstract: Rotary electric machine for a motor vehicle includes a stator, extending along an axis, the stator including a body and a winding provided with lead-out wires extending axially on either side of the stator body. At least one end shield includes a plate extending transversely and a skirt extending axially from the plate, the plate having an inner face oriented towards a lead-out wire of the winding. The inner face includes a main recess which increases the minimum axial distance separating the lead-out wire from the inner face, the main recess having a bottom extending radially.

Abstract: A partial-resonant converter is provided herein and comprises a partial resonant link formed by a magnetizing link inductor connected in parallel with a first capacitor on a primary winding side of a transformer and a second capacitor on a secondary winding side of the transformer, a pair of series connected switches coupled across the magnetizing link inductor and the first capacitor, and a plurality of forward conducting bidirectional blocking switches that connect an input source and an output load to the magnetizing link inductor during operation.

Abstract: In described examples, a circuit includes a voltage sensor that has an output, first and second transconductance amplifiers, first and second switches, a capacitive element, a comparator, and a sampling circuit. Each of the first and second transconductance amplifiers has a respective input, a respective output, and a respective transconductance. The first switch is coupled between the voltage sensor output and the first transconductance amplifier input. The second switch is coupled between the voltage sensor output and the second transconductance amplifier input. The capacitive element has a first terminal coupled to the respective outputs of the first and second transconductance amplifiers. The comparator has a respective input and a respective output. The comparator input is coupled to the respective outputs of the first and second transconductance amplifiers and to the first terminal of the capacitive element. The sampling circuit is coupled to the output of the comparator.

Abstract: A power converter apparatus comprises a set of switching elements communicatively coupled with a set of gate drive circuits. Each gate drive circuit is configured to provide a respective drive signal to a corresponding switching element, each switching element being switchably responsive to the respective drive signal. The apparatus includes a controller module configured to control an output state of the power converter, and selectively change one of a respective gate resistance and a respective gate current of a corresponding subset of the gate drive circuits based on the output state of the power converter.

Abstract: Systems and methods for current sensing are described. For example, a system may include a transformer including a winding that connects a first tap and a second tap; a circuit board; a first trace on a layer of the circuit board, wherein the first trace connects the first tap to a rectifier; a coil including one or more turns of trace on the layer of the circuit board, adjacent to the first trace; and a measurement circuit configured to estimate current flowing in the first trace based on voltage across the coil.

Abstract: A motor includes a rotor that includes a shaft located along a central axis, a stator that includes coils and opposes the rotor in a radial direction, and a lead wire support portion that is above the coil and supports lead wires extending from the coils. The lead wire support portion includes a guide portion through which the lead wires extend and which guides the lead wires to an upper side of the lead wire support portion in an axial direction. The guide portion includes a tubular insertion portion which opposes the coil and into which the lead wires are inserted and a tubular lead portion which is above the insertion portion and from which the lead wires inserted from the insertion portion are drawn out.