An inverter. The inverter includes a first and second transistors, which are a high-side transistor and a low-side transistor of the inverter, and control electronics configured to trigger a first switching operation, in which the first transistor is switched on, wherein the second transistor is in a switched-off state, wherein a parasitic capacitance of the first transistor is discharged during the first switching operation, to trigger a second switching operation, in which the first transistor is switched off or switched on again, wherein the second transistor simultaneously remains in the switched-off state, wherein the parasitic capacitance of the first transistor is already discharged in the second switching operation, to record a time difference which describes a difference between a duration of the first switching operation and a duration of the second switching operation, and to determine a characteristic operating parameter of the first transistor based on the time difference.

A current source inverter includes a first phase leg including a plurality of switching devices, a second phase leg including a plurality of switching devices, and a third phase leg including a plurality of switching devices. The current source inverter also includes a zero-state phase leg including at least one switching device, wherein the zero-state phase leg is configured to transition from an open state to prevent current flow to a closed state to allow current flow between a positive and negative terminal during a dead-band time.

A controller is provided to drive an inverter circuit for a PMSM. The inverter circuit is connected to a battery through a DC link capacitor, and is driven in one safe state during a fault condition. The controller monitors at least one parameter with respective threshold value to drive the inverter circuit in one safe state comprising an active Short Circuit (SC) and a Freewheel (FW). While in FW state, the controller switches from the FW state to the SC state if the at least one parameter is above the respective threshold. While in SC state, the controller controls engine speed to bring the PMSM to a predetermined speed when the stator temperature is more than a threshold temperature value. The controller switches from the SC state to the FW state.

A controller is provided to drive an inverter circuit for a PMSM. The inverter circuit is connected to a battery through a DC link capacitor, and is driven in one safe state during a fault condition. The controller monitors at least one parameter with respective threshold value to drive the inverter circuit in one safe state comprising an active Short Circuit (SC) and a Freewheel (FW). While in FW state, the controller switches from the FW state to the SC state if the at least one parameter is above the respective threshold. While in SC state, the controller controls engine speed to bring the PMSM to a predetermined speed when the stator temperature is more than a threshold temperature value. The controller switches from the SC state to the FW state.

An inductive power transmitter comprising: at least two switching elements connected across a resonant circuit, the resonant circuit including an inductance and a capacitance; wherein the transmitter is configured to adjust the value of the capacitance based on a desired operating frequency.

A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.

A control board of a power conversion device, the control board includes a board main body, a plurality of drive circuits, a power source control circuit, an insulation region, a plurality of insulation transformers, and a connecting line that electrically connects the plurality of insulation transformers and the power source control circuit to each other, and at least a part of which extends in a region in inner layers of the board main body that overlaps the insulation region when viewed in a perpendicular direction with respect to the surface of the board main body.

A power converter for converting a DC input voltage into an AC output voltage, the power converter having a structure of Phi-2 type, and includes an input terminal for the DC input voltage, an output terminal for the AC output voltage, a power switch equipped with a control electrode, a first electrode and a second electrode linked to a reference potential, the power switch being configured to receive a drive signal at the control electrode, the converter further comprising a self-oscillating circuit, connected between the output terminal and the control electrode, and configured to supply and maintain a sinusoidal drive signal to the power switch from the output voltage.

Apparatus for communicating across an isolation barrier. In one embodiment, the apparatus comprises a transformer having a first winding disposed on a first side of a printed circuit board (PCB) and coupled to a first local ground, and a second winding disposed on a second side of the PCB, the second side opposite to the first side, and coupled to a second local ground; a transmitter coupled to the first winding; and a receiver, coupled the second winding, that generates an output signal based on a signal received from the transmitter.

Apparatus for communicating across an isolation barrier. In one embodiment, the apparatus comprises a transformer having a first winding disposed on a first side of a printed circuit board (PCB) and coupled to a first local ground, and a second winding disposed on a second side of the PCB, the second side opposite to the first side, and coupled to a second local ground; a transmitter coupled to the first winding; and a receiver, coupled the second winding, that generates an output signal based on a signal received from the transmitter.