Minimization of THD for Square Wave VSI in Some Typical Loads for the Voltage Source Square Wave Inverter

The relationship between total harmonic distortion ( THD) of voltage source square wave inverter with its wave form width is analysed.A mathematical model of this kind of inverter is established.The result shows that the THD of output voltage is at its minimum when the switching on angle is 23.22 degree.The THD of output current is in contact with the load types.Some of the typical loads and their analysis results are also reported.