永磁同步電機之全速域直接轉矩控制研究

Research of Full-Speed Direct Torque Control Apply to Permanent Magnet Synchronous Machines

彭宏釤(Hong-Shan Peng)

指導教授 ： 劉志文

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2022年)

https://doi.org/10.6342/NTU202202666

摘要

本文結合空間向量調變技術與直接轉矩控制來改善傳統切換表技術之直接轉矩控制，於定轉矩區間使用了每安培最大轉矩控制(Maximum Torque Per Ampere, MTPA)，並將MTPA所求得的合成電流用以弱磁控制(Field-Weakening, FW)之電流限制，於更高速時進入每伏特最大轉矩控制(Maximum Torque Per Voltage, MTPV)來使電機表現更佳，並更進一步加入了以電壓為基準補償參數偏移的反饋弱磁與一種追蹤q軸電壓來達到MTPV近似效果的方法來使電機更簡單有效的進入MTPV區間。接著於軟體MATLAB/Simulink中建立電機模型與控制策略，驗證本文控制策略的可行性與強健性。最後，使用德州儀器的LAUNCHXL-F28069M數位訊號處理器(Digital Signal Processor, DSP)搭建硬體電路，完成內藏式永磁同步電動機的全速域直接轉矩控制驅動控制實作。

關鍵字

內藏式永磁同步電機 ； 每安培最大轉矩 ； 弱磁 ； 每伏特最大轉矩 ； 直接轉矩控制 ； 基於空間向量調變技術之直接轉矩控制

並列摘要

This thesis applied SVPWM-based (SVM-based) direct torque control on an interior permanent magnet synchronous motor, which has much lower torque ripples than conventional torque control. maximum torque per ampere (MTPA) is applied in the constant torque region, and the resultant current obtained by MTPA is used for the current limit of field-weakening (FW). At a higher speed region, maximum torque per voltage (MTPV) is applied for better performance. Furthermore, feedback field-weakening (FBFW) based on voltage to compensate for parameter offset and a method of tracking the q-axis voltage to achieve the approximate effect of MTPV are added to make the motor enter the MTPV range more easily and effectively. The feasibility and robustness of the mathematical model and control strategy are verified using MATLAB/Simulink. Finally, the control algorithms are implemented by the LAUNCHXL-F28069M float-point digital signal processor (DSP), developed by Texas Instruments (TI). The full-speed domain driving experiment of the interior permanent magnet synchronous motor is accomplished.

並列關鍵字

Interior Permanent Magnet Synchronous Motor ； Maximum Torque Per Ampere ； Field Weakening ； Maximum Torque Per Volt ； Direct Torque Control ； SVM-based Direct Torque Control

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