Study and experimentation of a rotor current excited Vernier reluctance machine aimed to direct-driven applications

Abstract

The present paper deals with the study and experimentation of a rotor current excited vernier reluctance machine. First, the structure is introduced and the conditions on the teeth and the polarity numbers necessary for the smooth running of such a structure are presented. Then, a simple procedure is given, based on some simplifying hypotheses, to obtain the initial geometrical and electrical sizes of a designed prototype. To validate the operating principle of the structure, a prototype is designed and studied using 2D FEM. Finally, this prototype was constructed and simulation results were compared to those obtained from the prototype.

Design and Optimization of a Brushless Wound-Rotor Vernier Machine

“…Moreover, due to both armature winding and field winding on the stator, the fill factor and current density of the armature winding are limited. To solve these problems, in [10], a wound-rotor vernier machine was introduced, in which field windings were placed on the rotor instead of the stator. This machine will have better saturation levels, but will also face problems in the maintenance of the brushes and slip-rings required for excitation of the rotor.…”