BIDIRECTIONAL POWER CONVERTER

摘要

A bidirectional power converter that can be used in an electric vehicle to perform AC to DC power conversion to charge the electric vehicle's battery and to perform DC to AC power conversion to export power to run external electrical loads is described. The bidirectional power converter may include an AC interface coupled to a cyclo-inverter circuit, and a DC interface coupled to a H-bridge circuit. The cyclo-inverter can be electrically coupled to the H-bridge circuit through a transformer. The bidirectional power converter may include a neutral terminal on the AC interface that is coupled to the transformer through a filtering inductor.

主权项

1. A bidirectional power converter comprising:
a H-bridge circuit including:
a DC interface including a positive DC terminal and a negative DC terminal;a first H-bridge leg coupled across the DC interface, the first H-bridge leg including a first switching circuit controlled by a first switching signal, and a second switching circuit coupled to the first switching circuit in series and controlled by a second switching signal; anda second H-bridge leg coupled across the DC interface, the second H-bridge leg including a third switching circuit controlled by a third switching signal, and a fourth switching circuit coupled to the third switching circuit in series and controlled by a fourth switching signal; and a cyclo-inverter circuit electrically coupled to the H-bridge circuit, the cyclo-inverter circuit including;
an AC interface including a first AC line terminal and a second AC line terminal;a first cyclo-inverter leg including a fifth switching circuit controlled by a fifth switching signal, and a sixth switching circuit coupled to the fifth switching circuit in series and controlled by a sixth gating signal, wherein the first AC line terminal is coupled between the fifth switching circuit and the sixth switching circuit; anda second cyclo-inverter leg including a seventh switching circuit controlled by the sixth gating signal, and an eight switching circuit coupled to the seventh switching circuit in series and controlled by the fifth switching signal, wherein the second AC line terminal is coupled between the fifth switching circuit and the sixth switching circuit.