Solid State Series Motor Drive

This paper is concerned with the detailed study of the performance characteristics of solid state dc series motor drives under phase control and current control schemes. The drive systems with the control schemes are simulated on a digital computer. An efficient time saving method is employed for computation. Different modes of operation are considered. The performance characteristics, such as, speed-torque, input harmonic content and input power factor variations are obtained and compared for the two types of control schemes. The peak current and ripple content which affect the commutating capability of the motor are also investigated. Current control scheme looks promising over the commonly used phase control scheme. Experimental results demonstrate the feasibility and verify the basic principles of operation.