Title :
Super-Multipolar Permanent Magnet Reluctance Generator Designed for Small-Scale Wind-Turbine Generation
Author :
Nakamura, Kenji ; Ichinokura, Osamu
Author_Institution :
Grad. Sch. of Eng., Tohoku Univ., Sendai, Japan
Abstract :
A permanent magnet reluctance generator (PMRG) has almost the same structure as a switched reluctance generator, but has permanent magnets in the stator yoke. Therefore, neither an exciting circuit nor a position sensor is required. This paper describes a super-multipolar PMRG for small-scale wind-turbine generation, which can be directly connected to the turbine without a gear box. The designed PMRG has two features for reducing torque ripple drastically; the first one is two-stacked structure that one rotor is shifted by 180° in electrical angle from the other rotor; the second one is that the rotor pole-tips are cut off. To find the optimum shape of the rotor pole-tip efficiently, the coupled analysis of finite element method and a general purpose optimization program is employed. In addition, load characteristics of the PMRG are indicated.
Keywords :
finite element analysis; gears; optimisation; permanent magnet generators; reluctance generators; wind power plants; wind turbines; PMRG; electrical angle; finite element method; gear box; general purpose optimization program; position sensor; rotor pole-tips; small-scale wind-turbine generation; stator yoke; supermultipolar PMRG; supermultipolar permanent magnet reluctance generator; switched reluctance generator; torque ripple reduction; two-stacked structure; Ferrites; Magnetic cores; Permanent magnets; Reluctance generators; Rotors; Stators; Torque; Permanent magnet reluctance generator (PMRG); super-multipolar; two-stacked structure; wind-turbine generation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2198441
