Analytical study of flux and experiments of a flux-barrier type reluctance motor with a slit rotor

The proposed reluctance motor has a rotor which consists of flux barrier type iron cores with slits to isolate magnetic flux. The iron cores are processed with press machines, and are easy for mass-production and assembly. The stator has the same structure as that of an induction motor. The motor has excellent controllability and very small torque ripple.We have made up an experimental motor and have evaluated the performances. As the results, the motor has been shown to have 1.7 times continuous torque as large as that of the conventional synchronous motor with ferrite magnet, peak to peak torque ripple of 3% of a nominal torque at rated torque, and speed response of 200Hz.In this paper, firstly, the structure of the motor is discussed. Secondly, analytical results of flux distribution and resulting torque are shown. Finally, the characteristics of the experimental motor are discussed.

[1]  Maarten J. Kamper,et al.  Effect of rotor dimensions and cross magnetisation on Ld and Lq inductances of reluctance synchronous machine with cageless flux barrier rotor , 1994 .

[2]  R.E. Betz,et al.  Control of synchronous reluctance machines , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[3]  N. Matsui,et al.  High precision torque control of reluctance motors , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[4]  T.J.E. Miller,et al.  Design of a new axially-laminated interior permanent magnet motor , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.