Finite Element Modeling of a Permanent Magnet DC Motor and a Self-excited Three-Phase Induction Generator

• Main Authors: Yu-Ren Ma, 馬玉壬
• Other Authors: Yaw-Juen Wang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/16966065303989745820

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 94 === This thesis is divided into two parts, the permanent magnet dc motor, and the self-excited induction generator. A permanent dc motor uses permanent magnet as its poles. Since it has no excitation windings in its poles, the magnetic flux cannot be controlled. When the reluctance of the magnetic circuit is too high, the magnetic flux in the poles will be significantly reduced, resulting in a too low voltage and a too high current in the armature. This is followed by an increase in the temperature of the machine body, causing a demagnetization effect of the permanent magnet and finally damage of the motor. In this thesis, a 420 W, 24 V permanent magnet DC motor is analyzed using the finite element method to improve its design of the magnetic circuit. In the second part related to the induction generator, the finite element method is also utilized to simulate the performance of self-excited condition of induction generator, which verifies the feasibility of the isolated self-excited induction generator simulated by finite element.