Research On A New Resonant Soft-switching Inverter

Resonant soft-switching technique is a hot topic in the power electronics field recently. It has improved the design of the power electronic converter greatly because of the deep research and widespread application of the soft-switching theory. Soft-switching technique can make the converter more efficiency, more power density, and more reliability. It can decrease the EMI caused by power converter and environment pollution (noise, etc) effectively.Firstly, this papera introduces soft-switching technique simply and summarizes the operating principle of the soft-switching technique and the main topologies.Secondly, this paper analyzes the operating principle of the SPWM modulation strategy for the three-phase full bridge inverter deeply. And it also analyzes the sine wave producing process. In the aspect of the control realization, this paper studies the digital control technique with digital signal processor (DSP). And then the SPWM modulation strategy and digital signal processor technique are unitedFinally, based on the above theory analysis, this paper executes the simulation, the simulation results indicates that the voltage switch of the inverter has become zero voltage situations before the switch trigger signal coming. So it realizes the soft-switching progress. The output current waveform of the inverter has better sine quality.