Field-based analysis for series DC motors

The paper describes a finite element technique for modelling transient fields in a series DC motor. The method is based on a coupled fields and circuit equation approach that allows the commutators and brushes to be modelled by switches to account for the commutation process. Computational and experimental results of the motor are included.

I. INTRODUCTION

The series DC motor is a varying-speed motor with markedly drooping speed-load characteristic. It is well suitable for applications requiring very high starting torque and heavy torque overloads, as in subway cars, automobile starters, hoists, cranes and blenders.