無刷直流電動機的寛速控制方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

096150032

專利證號

I 356578

專利獲證名稱

無刷直流電動機的寛速控制方法

專利所屬機關 (申請機關)

明新學校財團法人明新科技大學

獲證日期

2012/01/11

技術說明

本計畫主要目的在研發內嵌式永磁無刷電動機驅動器之新型寬廣速度驅動策略。在本計畫中已經成功地研製驅動內嵌式永磁無刷電動機的新型換向相位超前方法來達到高速弱磁控制的目的，由實驗結果得知其性能比傳統的弱磁切換方法具有較低脈動轉矩與較低功率損失。而且本驅動器反流器採用電壓控制方式，可以節省電流感測元件的成本，但是其功能仍保有反流器過電流保護的功能。本驅動方法使電動機轉速範圍可和緩延伸到高轉速弱磁區，實驗結果亦顯示高速弱磁區的輸出功率比額定轉速輸出額定功率時為高，所以本策略已使用內嵌式永磁無刷電動機的磁阻轉矩來提高弱磁區的輸出功率，即定轉矩極限區已經可延伸至較高轉速區域。本計畫是採用一顆數位信號處理器為控制核心來建立驅動器的雛形，在本報告裡並附上一些實驗波形圖來印證本切換方法的良好性能。 The major purpose of this project is to develop a new control strategy for interior permanent magnet brushless motor (IPM-BLDC) drives over extended speed range. A new phase-advanced commutation method for the field-weakening control has been successfully developed in this project. Experimental results have shown that the new method has lower pulsating torque and higher efficiency than the conventional one. In addition, the drive uses only voltage control strategy such that the current sensors can be eliminated to reduce the hardware cost. Hence, an indirect over current detection method is developed to protect the drive from over load. The motor speed has a smooth transition from low speed region to the field-weakening high speed region by using the method. Experimental results also show that the speed range of the constant torque limit region has been extended. It indicates that the reluctance torque has been developed by applying the field-weakening control.

備註

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