Implementation of indirect vector control to induction motor with zero current transition inverter

In this study, the speed control of the vector controlled induction motor was implemented by using hard switching and soft switching inverters. A TMS320F243 digital signal processor was used to implement control algorithm during practical implementation. With the use of the vector control, complex structure of the controller is simplified, and dependence to variations of the motor parameters is reduced. In order to reduce switching losses arising mainly from hard switching method a soft switching method was designed and implemented. Switching signals of the auxiliary switches are independent from main switching signals in the proposed method. The method can be applied to the puls width modulation (PWM) inverter by setting up proper switching strategies.