Implementation of a Synchronous Reluctance Position System without Shaft Sensor

• Main Authors: Chih-An Dai, 戴志安
• Other Authors: Tian-Hau Liu
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/09683048464777995725

碩士 === 國立臺灣科技大學 === 電機工程系 === 89 === This thesis presents the position control of a synchronous reluctance motor without a shaft sensor. The main purpose of the thesis is to propose a shaft position estimator, a velocity estimator, and a position controller for the synchronous reluctance motor. First, the shaft position estimator is obtained by detecting the slope change of the motor currents. Next, a state observer is realized to obtain the velocity of the motor. This state observer is not influenced by the high frequency noise that comes from the position estimator. In addition, the observer has a good tracking ability and a good steady-state characteristic. After that, the position-loop PI and H∞ controllers are designed to achieve a good transient response and good load disturbance rejection capability. In this thesis, theoretical analysis is proposed first. Then, some computer simulations are provided to validate theoretical analysis. Finally, a synchronous reluctance position control system is implemented. A fully digital control system is obtained by using a 32-bit digital signal processor. The measured results can validate the simulated waveforms and evaluate the correctness and feasibility of the proposed methods.