X-type multilevel converter system including interleaved topology for mutual inductance cancellation

Abstract

The present invention relates to an X-type multi-level converter system including interleaved topology for mutual inductance cancellation. A multiphase power inverter includes a plurality of X-type multi-level power converters arranged to transfer electrical power between a high voltage direct current (DC) power source and a motor. Each of the plurality of X-type multi-level power converters is configured as a solid state integrated circuit (IC) including a folded leg including a plurality of semiconductor switches and a clamping diode. The plurality of semiconductor switches, a positive DC power bus, a negative DC power bus, a first AC bus, a second AC bus, a third AC bus, a fourth AC bus, and the clamping diode are arranged in a plurality of levels. Having both the positive DC power bus and the negative DC power bus in parallel with a neutral bus creates mutual inductance cancellation that minimizes parasitic inductance by coupling positive and negative mutual inductance of commutated loop currents within each of the X-type multi-level converters.

Images