Two Phase Inverter Drive of Three Phase Motor

The number of three phase motors drive system by inverter are increasing. Two phase inverter which decreases the number of switches in the inverter is one method to realize low cost application. This paper shows how to use 4 switches of two phase inverter in order to drive three phase motor. The results show that the mean value and fundamental component of output 3 phase voltage are balanced. The output voltage can be controlled by modulation factor. The experiment result of three phase induction motor fed by two phase pulse width modulation inverter shows that three phase current of motor is balanced.