應用混合式向量控制於三相感應驅動器之模擬與分析

Simulation and Analysis of Hybrid Vector Control for Three-phase Induction Motor Drive

郭士盟(Shr-Meng Guo)

指導教授 ： 邱國珍

國立虎尾科技大學/電機資訊學院/電機工程研究所/碩士(2011年)

摘要

本論文應用混合式向量控制於三相感應驅動器實現電動機轉矩控制，此三相感應驅動器由一個降壓式轉換器與三相全橋式轉換器所組成，其中三相全橋式轉換器上臂是由三個二極體所組成；而下臂是由三個主動式開關所組成。由於感應電動機間接向量控制法需利用電動機參數控制電動機轉矩，且易受到溫度改變的影響，故使轉矩控制不易；另外，直接向量控制法則是利用磁通量直接控制轉矩，但裝設磁通估測器之成本過於昂貴且不容易裝設，故在實現上有其困難度。因此，本文提出一混合式向量控制器用於三相感應驅動器上，可透過電壓感測元件直接控制磁通相位以達成轉矩控制，結果使其包含了直接向量控制與間接向量控制的優點。最後，使用VisSim軟體來設計與模擬混合式向量控制應用於三相感應驅動器以達成轉矩控制，並提出模擬結果來驗證所提混合式向量控制之可行性。

關鍵字

直接向量控制 ； 間接向量控制 ； 電壓感測器 ； 轉矩控制 ； 三相感應驅動器

並列摘要

In this thesis, hybrid vector control is used for three-phase induction motor drive to implement the torque control of motor. The three-phase induction driver combines a buck converter with a three-phase full-bridge converter. The three-phase full-bridge converter is composed of three diodes in upper arm and three power switches in lower arm. Indirect vector control of induction motor needs some motor parameters to control torque, but temperature affects the parameters and correct control. In addition, direct vector method controls the torque directly using a flux estimator, but the flux estimator is expensive and not easily to install. Therefore, a hybrid vector control method for three-phase induction motor drive is proposed. The method applies voltage sensor to control flux phase, then to control the torque. Finally, VisSim software is employed to simulate hybrid vector control for the motor drive. Simulation results are presented to verify the feasibility of the proposed hybrid vector control method.

並列關鍵字

Direct vector control ； Indirect vector control ； Voltage sensor ； Torque control ； Three-phase induction driver

參考文獻

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