FPGA based real-time simulation of high frequency soft-switching circuit using time-domain analysis

International audienceOne of the main keys for modern high efficiency power converters intended for traction applications is implementation of soft-switching technology. Moreover, its control technologies seeks to increase the power density with high frequency. However, this kind of architecture, involving high frequency resonance, is too complex for the real-time simulation with a limited bandwidth. This paper proposes a reduced-order model for this soft-switching circuit by time-domain analysis approach which exhibits a valuable characteristic for the realtime simulation. A variable matrix and subsystem methods are used to solve interface voltages/current from the torn system. Successful implementation of the proposed model on a field programmable gate array (FPGA) device is reported and its application for traction power supply system is implemented with a hardware in the loop (HIL) test. Fixed point operators are used to ensure good accuracy and low computational latency. Comparison between the experiment results and tractionauxiliary analysis shows its stability