Squirrel-Cage Type Induction Machine Utilizing Space Harmonics for Secondary Excitation with Concentrated Winding Stator

This paper describes a novel squirrel cage type induction machine utilizing space harmonics for brushless secondary excitation. The unique point of this proposed technique is able to utilize space harmonic for additional torque generation. Its space harmonic is inevitably generated by concentrated winding structure. The magnetic circuit topology of brushless secondary excitation technique with space harmonic and its effects on torque increase is conducted by FE-analysis. Then, the driving performance are analytically revealed by comparing with conventional squirrel cage type induction machine.