具轉子位置誤差校正與弱磁控制之無刷直流馬達驅動器實現

Implementation of a BLDC Motor Drive with Rotor Position Error Correction and Field Weakening Control

蘇信銘(Shinn-Ming Sue) ； 謝秉彣(Ping-Wen Hsie)

《明新學報》 42卷1期 (2016/02) Pp. 47-59

摘要

無刷直流馬達常應用於工業上不需精密控制之驅動系統，因其高功率密度與不需特別維護之特性，已經使其成為工業應用上多數高效率低成本驅動系統的動力來源，但因其有裝設霍爾感測器偵測轉子位置時，使成本增加及降低可靠度等缺點，因此本文之目的在於針對裝置誤差之霍爾感測器以離線方式量測霍爾感測器輸出之轉子位置訊號與反電動勢間之裝置誤差相角，透過電流相位超前落後補償機制，使無刷直流馬達能以較佳之換相點執行定子繞組換相，藉此降低不必要的電能耗損及提高電能轉換效率，並進一步利用電流相位超前補償機制之概念以相位超前法實現改良式高速低轉矩漣波弱磁控制。本文所研發的驅動器已經透過實測一工業風扇用無刷直流馬達來印證所提出的相位電流超前落後補償方法之可行性，並顯示本文提出的控制方法與傳統弱磁控制方法於弱磁工作區之比較結果，本方法在轉矩漣波改善與轉速提升上具有較佳的性能。

關鍵字

無刷直流馬達 ； 相位超前落後補償 ； 弱磁控制

並列摘要

Brushless DC motors are widely used in industrial applications and becoming one of the most high efficiency and cost effective drives because of their high power density and free from maintenance. However, mounting the hall sensors to detect rotor position will increase the cost and reduce the reliability. Therefore, this paper is to use an offline method to obtain the misplacement hall sensors' error phase angle. Then, by using a compensation method to properly apply correct motor voltage, the brushless DC motor's stator windings can operate under a better commutation point. The authors also use the concept of current phase advancing compensation to realize a high speed and low torque ripple field-weakening control. An industrial fan brushless DC motor is used to test the feasibility of the proposed current phase advancing and lagging compensation method. The experimental results show the performance improvement in torque ripple and rotor speed with the proposed field weakening method.

並列關鍵字

brushless DC motor ； phase advancing and lagging compensation ； field weakening control

參考文獻

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