本文選題：無刷直流電機 + 非理想反電動勢��； 參考：《電工技術(shù)學(xué)報》2017年17期

【摘要】：無刷直流電機伺服系統(tǒng)具有廣泛的應(yīng)用場合,但轉(zhuǎn)矩波動限制了其在高精度場合的應(yīng)用。針對非理想反電動勢引起的無刷直流電機轉(zhuǎn)矩波動提出了一種基于電流反饋的分段式PWM控制方法。該方法通過線反電動勢觀測器獲得產(chǎn)生目標(biāo)轉(zhuǎn)矩值的參考電流,以實現(xiàn)對電機轉(zhuǎn)矩的直接控制。同時,針對電機高速與低速運行狀態(tài)分別采用不同的PWM控制策略來有效消除換相轉(zhuǎn)矩波動,系統(tǒng)具有低轉(zhuǎn)矩波動和高轉(zhuǎn)矩輸出的特點。通過在Matlab/Simulink環(huán)境下建立系統(tǒng)仿真模型,對該控制方法的轉(zhuǎn)矩直接控制能力進(jìn)行檢驗,并對轉(zhuǎn)矩波動進(jìn)行了對比;搭建實驗平臺對具有非理想反電動勢的無刷直流電機進(jìn)行了驅(qū)動實驗。仿真和實驗結(jié)果表明,該文所提出的控制方法能有效減小轉(zhuǎn)矩波動,提高無刷直流電機伺服系統(tǒng)輸出轉(zhuǎn)矩的穩(wěn)定性和位置控制精確度。
[Abstract]:Brushless DC motor servo system has a wide range of applications, but torque ripple limits its application in high precision situations. A segmented PWM control method based on current feedback is proposed for torque ripple of brushless DC motor caused by non-ideal backEMF. In this method, the reference current which generates the target torque value is obtained by the line backEMF observer to realize the direct control of the motor torque. At the same time, different PWM control strategies are adopted to eliminate commutation torque ripple effectively according to the high speed and low speed running state of the motor. The system has the characteristics of low torque ripple and high torque output. By establishing the system simulation model under the Matlab/Simulink environment, the torque direct control ability of the control method is tested, and the torque ripple is compared. An experimental platform was built to drive the brushless DC motor with non-ideal back EMF. Simulation and experimental results show that the proposed control method can effectively reduce torque ripple and improve the output torque stability and position control accuracy of brushless DC motor servo system.
【作者單位】： 上海理工大學(xué)光電信息與計算機工程學(xué)院電氣系;
【基金】：國家自然科學(xué)基金項目資助(51207091/E070303)
【分類號】：TM33

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本文編號：1777774