Multiobjective Optimal Design of an Interior Permanent Magnet Synchronous Motor for Electric Scooter

• Main Authors: Da-Yu Wu, 吳大宇
• Other Authors: Yee-Pien Yang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/52090651410957723489

碩士 === 國立臺灣大學 === 機械工程學研究所 === 101 === In this thesis, an interior permanent magnet (IPM) motor is designed based on specifications for electric scooters. IPM motors are robust and capable of operating at high motor efficiency over a wide range of speeds. In addition, the q-axis inductance is greater than the d-axis inductance because of the rotor geometry. As a result, reluctance torque can be generated, making the magnet highly resistant to demagnetization. In addition, the flux-weakening control, implemented by leading the input current phase, also increases the motor speed.First, the preliminary design determines the motor type, winding type, and the number of slots and poles. Second, a two-dimensional (2-D) magnetic circuit model for IPM motors is constructed by using the motor design equations, and the electromagnetic equations were established for an optimal motor design with a multifunctional optimizer. Finally, the optimal design result is verified by experiments on a prototype machine.