Super-multipolar permanent magnet reluctance generator designed for small-scale renewable energy generation

This paper describes a super-multipolar permanent magnet reluctance generator (PMRG) for small-scale renewable energy generation. The numbers of stator and rotor poles of the PMRG are 72 and 96 respectively, in order to be directly connected to the turbine without a gear box. The rated power of the designed PMRG is about 1.0 kW at 100 rpm. The PMRG has two features for reducing torque ripple; the first one is a two-stacked structure, namely, one rotor is shifted by 180 deg. in electrical angle from the other rotor; the second one is that the rotor pole-tips are cut off so that the torque waveform consists of only odd-harmonics. In such a structure, the torque ripple of the PMRG can be reduced drastically. In this paper, first, the shape of rotor pole-tips is optimized by two-dimensional finite element method (2D-FEM) coupled with a general purpose optimization program. Next, the load characteristics of the PMRG obtained from 3D-FEM are indicated. Finally, the measured characteristics of the developed 72/96-pole PMRG are described.

[1]  Jun Yoshida,et al.  Stator-Permanent-Magnet Reluctance Generator using Ferrite Magnet for Small-Scale Renewable Energy Generation , 2010 .

[2]  Yifan Zhao,et al.  A novel doubly salient single phase permanent magnet generator , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[3]  A. V. Radun,et al.  Two-channel switched reluctance starter/generator results , 1998 .

[4]  R. Cardenas,et al.  Switched reluctance generators for wind energy applications , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[5]  中村 健二 Dynamic Simulation Model of Switched Reluctance Generator , 2003 .

[6]  Eike Richter,et al.  Performance evaluation of a 250 kW switched reluctance starter generator , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[7]  John A. Nelder,et al.  A Simplex Method for Function Minimization , 1965, Comput. J..

[8]  Kenji Nakamura,et al.  Three-Phase Reluctance Generator with Permanent Magnets Buried in Stator Core , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[9]  T.A. Lipo,et al.  A novel permanent magnet motor with doubly salient structure , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.