ANALYSIS OF COMMUTATION OF SELF CONTROLLED CURRENT SOURCE INVERTER-FED SYNCHRONOUS MOTOR.

A simple but effective method is developed to determine the steady state performance of a synchronous motor fed from a current source inverter employing machine commutation. The equations in d-q variables are used to develop the relevant mathematical model for the purpose of analysis. Based on the assumption of constant damper flux linkages, an expression is developed for the current during commutation. An iterative procedure is given to obtain the steady state performance of the motor. The validity of the method is confirmed by means of test results on an experimental machine.