A power supply unit includes a current path, and is capable of receiving external power from an external power supply and supplying the received external power to a power storage device, and receiving power from the power storage device and supplying the received power to a device mounted in a vehicle. The power supply unit comprises one or more power converters, a relay that switches the current path. and a housing that accommodates the one or more power converters and the relay therein. The one or more power converters are heavier in weight than the relay and disposed in the housing below the relay.

The invention relates to an electronic module for an electric drive in a vehicle, comprising an input-side electrical connection for inputting an input current generated by an energy source; an intermediate circuit with a capacitor; a semiconductor bridge circuit, connected in parallel to the intermediate circuit, wherein the bridge circuit comprises a high-side switch, and a low-side switch connected in series to the high-side switch, wherein the high-side switch is connected to the input-side electrical connection via a first current path, wherein the low-side switch is connected to the input-side electrical connection via a second current path, wherein the first current path and the second current path are the same length; and an output-side electrical connection for outputting an output current generated by the bridge circuit from the input current.

A vehicle mounted electrical power converter includes: a heatsink; a circuit board placed on or above the heatsink; a power semiconductor device mounted on or above the circuit board; a control board support base that is placed on and/or above the circuit board and that supports a control board; and a heat transfer member being interposed between the power semiconductor device and the control board support base and thermally coupling between the power semiconductor device and the control board support base.

An active discharge circuit for electric vehicle inverter, the active discharge circuit intended to be connected in parallel with a DC link capacitor connected between positive and negative lines of a DC power link, wherein the circuit comprises a dissipative current source, a switch connected in series with the current source between the DC lines, and a controller connected to the switch and arranged to apply an activation signal in dependence of a control signal, the activation signal placing the switch in a conducting state, wherein the current source is configured to draw a discharge current and dissipate any energy stored in the DC link capacitor when the switch is in the conducting state. As long as the switch is closed by the activation signal, the current source will draw a constant current and dissipate power, and the voltage across the DC link capacitor will decrease linearly.

A switching circuit for an electric vehicle (EV) includes a first leg of the switching circuit, including a first switch and a second switch, that receives a first phase of three-phase alternating current (AC) electrical power; a second leg of the switching circuit, including a first switch and a second switch, that receives a second phase of three-phase AC electrical power; a third leg of the switching circuit, including a first switch and a second switch, that receives a third phase of three-phase AC electrical power; and a capacitor leg having two or more capacitors electrically connected in parallel with the first leg, the second leg, the third leg of the switching circuit, wherein the capacitor(s) permit zero sequence current flow through the first leg, the second leg, and the third leg while the three-phase AC electrical power is applied to the circuit.

A junction assembly is disclosed herein. The junction assembly includes a junction housing configured to support a phase bar assembly. A heatsink contacts at least a portion of the junction housing and a busbar is arranged adjacent to the junction housing. At least one fastener attaches the junction housing, the heatsink, and the busbar to each other. At least one heatsink seal is provided at an interface defined between the heatsink and the junction housing.

Provided is a converter including: a primary-side switching unit to be connected to a battery; a secondary-side switching unit to be connected to a motor; a transformer provided between the primary-side switching unit and the secondary-side switching unit; and a controller configured to control at least the secondary-side switching unit so as to output a voltage that depends on an output waveform profile of a desired waveform to the motor.

An intermediate circuit adaptation device for a vehicle. The intermediate circuit adaptation device includes a DC intermediate circuit with at least two phases and a control unit. The control unit is configured to change the intermediate circuit voltage and/or the number of phases of the intermediate circuit on the basis of the current operating point.

An onboard powertrain for an automated guided vehicle, AGV, is presented herein. The onboard powertrain includes a split-source inverter, SSI, having at least one middle point pole, a positive DC-link pole, and a negative DC-link pole, a battery and an inductor connected in series between the positive or negative DC-link pole and the middle point pole, and a supercapacitor connected between the positive and negative DC-link poles.

A vehicle inverter circuit includes a first inverter and a second inverter connected to a motor, a mode conversion switching element configured to short-circuit or open the first inverter and the second inverter based on a switching operation to drive the motor in one of a Y-winding driving mode and an open-end winding driving mode, and a controller configured to control a switching operation of the mode conversion switching element.