Three Phase Sine Wave Voltage Source Inverter Using the Soft Switched Resonant Poles

A zero voltage switching based three phase voltage source inverter is presented. The soft switched resonant pole which is obtained by generalizing the conventional pseudo-resonant pole, is presented and suitable control and modeling methods are also described. The three phase resonant pole inverter is easily obtained by connecting three resonant poles to voltage source in parallel and it can be operated on higher power level than the conventional resonant dc-link inverters with the same ratings of devices since the device stresses are lower. Further, it shows high quality spectral performance close to sinusoidal waveform, due to the filtering action of LC elements. Analysis and simulation results are shown to verify the operating principle of the proposed three phase resonant pole inverter.