无刷直流电机电流连续控制方法的研究与实现
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摘要
采用一种无刷直流电机连续电流控制的方法抑制换相转矩脉动。该方法是在霍耳跳变后延迟30°采用连续的可控方式控制绕组电流变化,并通过改变PWM调制的占空比,使导通相电流由0逐渐增加至幅值,而关断相电流由幅值逐渐减小至0,恒通相电流保持幅值大小不变,从而三相形成连续变化的电流波形,合成电流矢量为正六边形。从实验结果可以得出,该方法抑制了换相电流脉动,并达到较好的控制效果。
A method for controlling brushless DC motor continuous current was accepted to suppress commutation torque ripple. The method was to control the winding current changes by a continuous and controllable method after a delay of 30°in Hall transition. And by changing the duty cycle of the PWM modulation,the on-phase current was gradually increased from 0 to the amplitude,the off-phase current was gradually reduced from the amplitude to 0,the constant-phase current keep the amplitude unchanged,thus the three-phase formed a continuously changing current waveform and the resultant current vector was a regular hexagon. It could be concluded from the experimental results that the method suppresses the commutation current ripple and achieves a better control effect.
A method for controlling brushless DC motor continuous current was accepted to suppress commutation torque ripple. The method was to control the winding current changes by a continuous and controllable method after a delay of 30°in Hall transition. And by changing the duty cycle of the PWM modulation,the on-phase current was gradually increased from 0 to the amplitude,the off-phase current was gradually reduced from the amplitude to 0,the constant-phase current keep the amplitude unchanged,thus the three-phase formed a continuously changing current waveform and the resultant current vector was a regular hexagon. It could be concluded from the experimental results that the method suppresses the commutation current ripple and achieves a better control effect.
引文
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[3]周美兰,高肇明,吴晓刚,等.五种PWM方式对直流无刷电机系统换相转矩脉动的影响[J].电机与控制学报,2013,17(7):15-21.
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[10]石坚,李铁才.无刷直流电动机低转矩脉动超前换相控制方法[J].中国电机工程学报,2012,32(30):112-117.
[11]王大方,卜德明,朱成,等.一种减小无刷直流电机换相转矩脉动的调制方法[J].电工技术学报,2014,29(5):160-166.
[12] Jiang W,Huang H,Wang J,et al. Commutation Analysis of Brushless DC Motor and Reducing Commutation Torque Ripple in the Two-phase Stationary Frame[J]. IEEE Transactions on Power Electronics,2017,32(6):4675-4682.
[13]盛田田,王晓琳,顾聪,等.一种使用重叠换相法的无刷直流电机平均转矩控制[J].中国电机工程学报,2015,35(15):3939-3947.
[14] Chen Y,Tang J,Cai DS,et al. Torque Ripple Reduction of Brushless DC Motor on Current Prediction and Overlapping Commutation[J]. Przeglad Elektro-techniczny,2012,88(10):247-253.
[15]王祖靖,陈旭东,周扬忠,等.永磁无刷直流电机两相导通SVM-DTC[J].电力电子技术,2017,51(5):90-92.
[2]张相军,陈伯时.无刷直流电机控制系统中PWM调制方式对换相转矩脉动的影响[J].电机与控制学报,2003,7(2):87-91.
[3]周美兰,高肇明,吴晓刚,等.五种PWM方式对直流无刷电机系统换相转矩脉动的影响[J].电机与控制学报,2013,17(7):15-21.
[4]白利飞,马瑞卿,张庆超.无刷直流电动机PWM斩波方式分析[J].微特电机,2013,41(2):21-23.
[5]周美兰,李志,苏革航.无刷直流电机PWM调制方式对非换相期间转矩脉动的影响[J].哈尔滨理工大学学报,2014,19(5):74-81.
[6]薛晓明,陈宏.无刷直流电机关断相电流的研究[J].电工技术学报,2011,26(4):64-70.
[7]李春涛,汪海宁.不同PWM调制方式下无刷直流电动机非导通相续流分析[J].微特电机,2013,41(5):34-36.
[8]石坚,李铁才.一种消除无刷直流电动机换相转矩脉动的PWM调制策略[J].中国电机工程学报,2012,32(24):110-116.
[9] Shi J,Li TC. New Method to Eliminate Commutation Torque Ripple of Brushless DC Motor with Minimum Commutation Time[J]. IEEE Trans. on Ind. Electron.,2013,60(6):2139-2146.
[10]石坚,李铁才.无刷直流电动机低转矩脉动超前换相控制方法[J].中国电机工程学报,2012,32(30):112-117.
[11]王大方,卜德明,朱成,等.一种减小无刷直流电机换相转矩脉动的调制方法[J].电工技术学报,2014,29(5):160-166.
[12] Jiang W,Huang H,Wang J,et al. Commutation Analysis of Brushless DC Motor and Reducing Commutation Torque Ripple in the Two-phase Stationary Frame[J]. IEEE Transactions on Power Electronics,2017,32(6):4675-4682.
[13]盛田田,王晓琳,顾聪,等.一种使用重叠换相法的无刷直流电机平均转矩控制[J].中国电机工程学报,2015,35(15):3939-3947.
[14] Chen Y,Tang J,Cai DS,et al. Torque Ripple Reduction of Brushless DC Motor on Current Prediction and Overlapping Commutation[J]. Przeglad Elektro-techniczny,2012,88(10):247-253.
[15]王祖靖,陈旭东,周扬忠,等.永磁无刷直流电机两相导通SVM-DTC[J].电力电子技术,2017,51(5):90-92.