Motor Loss and Temperature Reduction with High Switching Frequency SiC-Based Inverters

This paper presents motor loss and temperature reduction performed with high switching frequency SiC-Based inverter for high speed motor. We developed prototype SiC inverter with proposed SiC gate drivers and custom SiC power modules. The proposed gate driver can reduce switching losses and switching delay time for higher switching frequency. We also developed SiC power modules without anti-parallel SBDs to reduce switching time and make it possible to enhance switching frequency higher. This paper shows some experimental results confirmed that the prototype SiC inverter reduces inverter loss compare to Silicon IGBT inverter at the same switching frequency, and also the prototype SiC inverter reduces motor loss and temperature with higher switching frequency.