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DEVELOPMENT OF INTERIOR PERMANENT MAGNET SYNCHRONOUS GENERATOR THAT CAN GENERATE FROM WEAK WIND WITH CHANGING ARMATURE FLUX LINKAGE.

开发可通过改变电枢磁通链由弱风发电的内部永磁同步发电机。

基本信息

批准号：
14350150
负责人：
TAKEDA Yoji
金额：
$ 4.93万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The aim of this study is to develop the high performance wind power generator, which operates at the wide wind velocity from low to high velocity.As the rotary speed of windmill is very slow, a speed up gear is indispensable to improve the efficiency of the generator. The gear, however, causes the large noise and generator system becomes heavy.An Interior permanent magnet synchronous generator (called IPMSG) with multi-pole, which is proposed in this study, is able to operate in the wide wind speed range. As the proposed IPMSG, however, requires strong permanent magnets, then the large cogging torque comes out. This large cogging torque disturbs the smooth operation of the windmill at low wind velocity, and the windmill can not operate at the low wind velocity. As a result, the utilization factor of windmill goes down.In this study, the new multi-pole IPMSG with spoke magnets buried in the rotor is proposed. The cogging torque and torque ripple improvement of the proposed IPMSG is examined.The flux barrier of the proposed rotor is designed in an asymmetrical structure to improve the cogging torque. Moreover, every silicon steel plate, which has an asymmetrical flux barrier, is revolved with one pole pitch and laminated.As a result, the cogging torque is greatly improved compare with ordinary IPMSG.. The high harmonic components of the induced voltage reduced, too. Torque ripple, if this generator is used as the motor, is reduced to 1/20.The multi-pole IPMSG with spoke type magnets proposed is able to operate at very wide wind velocity. As the conversion wind power to the electric power at the low wind velocity is not large, the rate of operation of the wind power generation system is improved.

本研究的目的是开发高性能风力发电机，使风力发电机能在从低风速到高风速的宽风速范围内运行，由于风车的转速很低，因此必须要有一个增速器来提高发电机的效率。本文提出的多极内置式永磁同步发电机（Interior Permanent Magnet Synchronous Generator，简称IPMSG）能够在较宽的风速范围内运行。然而，由于所提出的IPMSG需要强永磁体，因此产生大的齿槽转矩。这种大的齿槽转矩干扰了风车在低风速下的平稳运行，并且风车不能在低风速下运行。因此，本研究提出一种新型的多极永磁发电机，其转子内埋有轮辐式永磁体。研究了新型永磁同步发电机对齿槽转矩和转矩涟漪的改善效果，并将转子磁链屏障设计成非对称结构，以改善齿槽转矩。另外，由于采用了每片硅钢片按一个极距旋转并叠片的结构，使得齿槽转矩比普通的IPMSG有了很大的改善。感应电压的高次谐波分量也有所减少。该发电机用作电动机时，转矩涟漪可减小到原来的1/20。由于在低风速下将风力转换为电力的转换不大，因此提高了风力发电系统的运行率。