Simulation of SiC JFET Based Matrix Converter
Author(s): WANG Lina, LIU Dandan
Pages: 31-37
Year: 2016 Issue: 10
Journal: Electric Drive
Keyword: matrix converter; SiC junction field-effect transistor(JFET); bidirectional switch; varying-step commutation; Saber software;
Abstract: Modeling of SiC JFET-based matrix converter(MC)is explored in Saber. Firstly,method of parameter extraction and modeling of normally-on SiC JFETs was introduced. Then a new bidirectional switch structure was proposed,which could overcome the drawbacks of normally-on SiC JFETs that short circuits were prone to happen at the moment of powerup and under the condition of auxiliary power supply failure. Based on the proposed bidirectional switch structure,the main circuit of 3×3 matrix converter was built in Saber. Then,double space vector modulation of matrix converter was realized with the MAST language. Considering the time difference between turn-on and turn-off of normally-on SiC JFET,an optimized four-step commutation strategy was used,which improved the quality of output waveform. Finally,simulation results demonstrate the validity and reliability of the proposed model and optimized four-step commutation strategy.
Pages: 31-37
Year: 2016 Issue: 10
Journal: Electric Drive
Keyword: matrix converter; SiC junction field-effect transistor(JFET); bidirectional switch; varying-step commutation; Saber software;
Abstract: Modeling of SiC JFET-based matrix converter(MC)is explored in Saber. Firstly,method of parameter extraction and modeling of normally-on SiC JFETs was introduced. Then a new bidirectional switch structure was proposed,which could overcome the drawbacks of normally-on SiC JFETs that short circuits were prone to happen at the moment of powerup and under the condition of auxiliary power supply failure. Based on the proposed bidirectional switch structure,the main circuit of 3×3 matrix converter was built in Saber. Then,double space vector modulation of matrix converter was realized with the MAST language. Considering the time difference between turn-on and turn-off of normally-on SiC JFET,an optimized four-step commutation strategy was used,which improved the quality of output waveform. Finally,simulation results demonstrate the validity and reliability of the proposed model and optimized four-step commutation strategy.
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