DSP based Minimum Input Power Control of Induction Motors

• Main Authors: Wen-Ching Lin, 林文清
• Other Authors: Chih-Wen Liu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/55338627139080367582

碩士 === 國立臺灣大學 === 電機工程學研究所 === 92 === The induction motor (IM) is a high-efficiency machine when working close to its rated operating point. However at torques and/or speeds far from the rated values the efficiency is greatly reduced. This thesis presents a simple and useful techniques for the minimum input power method of the indirect vector-controlled induction motor drives. The minimum input power method is named Hybrid Technique which combines Loss Model Control (LMC) and Search Control (SC) method. We use the LMC approach to obtain the initial value of the flux and subsequently adjust it by the Search Control method. The hybrid technique is simple, easily realizable, and offer fast convergence. The inverter switching method is Space Vector PWM which makes the lower harmonic losses. The simulation results of the minimum input power method using MATLAB/SIMULINK are presented. A DSP TMS320LF2407A is to implement the hybrid technique. Experimental results show the effectiveness of the proposed technique. However, there is room for improvement.