Optimal Speed Control of Sensorless Permanent Magnet Synchronous Motor Drive Systems

• Main Authors: Chao-Jian Huang, 黃朝建
• Other Authors: Tian-Hua Liu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/2w9ynx

碩士 === 國立臺灣科技大學 === 電機工程系 === 105 === This thesis investigates the rotor position estimation and optimal speed controller for an interior permanent magnet synchronous motor. By using a high-frequency injection method, the rotor position and speed can be estimated based on the saliency of the interior permanent magnet synchronous motor. First, the frequency and amplitude are selected according to the current resolution and the testing results. Next, the high-frequency voltage is injected into the estimated d ̂-axis. Then, the rotor position estimated error is computed via the d ̂-q ̂ axis feedback currents. Finally, an iterative method is used to compute the estimated rotor position. The speed-loop controller is an optimal controller, which is designed based on the motor dynamic equation and performance index. A digital signal processor TMS320F2808, is used as a control kernel to execute the rotor position estimation and the control algorithm. Experimental results show the feasibility and correctness of the proposed methods.