Performance of induction motor driven from self-commutating inverter

A self-commutating thyristor convertor, fed from a DC supply, drives an induction motor which is provided with excitation capacitors. The frequency of the alternating voltage at the convertor output, and the corresponding speed of the induction motor, can be controlled by varying the values of capacitance, direct voltage, and inverter control angle. The motor operates satisfactorily when loaded. A method of analysis is put forward.