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標題: 無感測直流無刷馬達驅動器研製
Design and Development of a Brushless DC Motor Driver
作者: 揚明哲
關鍵字: 無刷;無感測
出版社: 電機工程學系

In general, a brushless DC motor (BLDCM) operates under the conditions that the magnetic position of the rotor should be detected via the Hall effect sensors. However, using hall position sensors to detect the rotor position, the control system of the BLDCM becomes very unreliable, in harsh environments. Therefore, in order to improve the BLDCM's capabilities, the purpose of thesis focuses on developing BLDCM drivers utilizing the ST72141 microcontroller without the dedicated hall position sensors. Through using the appropriate pulse width modulation (PWM) signal and measuring the terminal voltage, the zero crossing of the back electromagnetic force (BEMF) is detected directly and is not susceptive to noise. Moreover, in order to enhance the performance of the sensorless BLDCM drive, detecting the zero crossing of the demagnetization current is utilized herein. On the other hand, the gain scheduling control is employed to upgrade the transient speed response. In this thesis, the principle of BLDCM's operation is described and some experimental results are provided to verify this proposed method.
Appears in Collections:電機工程學系所

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