Steady-State and Transient Synthesis of 3-Phase Reluctance Motors (Synchronous Motors Without Field Excitation)

Abstract

In this paper the 2-reaction theory of synchronous machine analysis has been extended to obtain a synthesis procedure for 3-phase reluctance motors. Experiments were made on a motor with a rotor especially designed and constructed to conform with the assumptions of the generalized 2-reaction theory. Results of a differential analyzer investigation formed the basis for a method for simultaneous steady-state and optimum transient synthesis. In the synthesis procedure presented, the assumption is made that the desirable pullout torque, load torque to be pulled into synchronism, load inertia, supply voltage, supply frequency, and desired motor speed are specified. Certain stator laminations are assumed to be available. The maximum flux density in the stator teeth and the maximum current density in the stator conductors also are specified. The synthesis procedure then aims at obtaining the optimum design using the available stator laminations.