COMPUTER AIDED DESIGN OF SWITCHED RELUCTANCE MOTOR

Abstract

The thesis presents an integrated computer program SRMcAD. which takes over the design problem of the switched reluctance motor (SRM). Input data is the required motor specification; rated power, rated voltage, rated (or base) speed, and the number of phases. This program simulates an integrated algorithm which is combined of: a proposed design algorithm and a machine analysis algorithm. The first algorithm is suggested by the author. It carries out the magnetic and electric design of regular SRMs; in an iterative manner. The second algorithm, suggested by Dr. EI-Sersawy, implements a nonlinear method of calculating the expected performance.

The computation processing of the integrated algorithm is executed in two stages. In the first stage, the program determines a preliminary design according to the given rating and design specification. This specification is modified and adjusted internally, within the permissible ranges, to suit the motor rating. Interaction between the user and computer is minimized; but the last decision is taken by the user.

Also in the first stage, all the magnetization characteristics are calculated in tabulated form according to the dimensions of the preliminary design. These characteristics are the inductance List L (O,i), the flux-linkage List \If (O,i) and the inverted List i(O,\\f). Also in this stage, the list of the proposed switching conditions is formulated; either self by the program or given by the user. These lists are required in the second stage.