| 方波无刷电动机的倍频PWM控制方法 |
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| 引用本文： | 汤平华,廖志辉,李铁才.方波无刷电动机的倍频PWM控制方法[J].电机与控制学报,2009,13(3). |
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| 作者姓名： | 汤平华 廖志辉 李铁才 |
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| 作者单位： | 哈尔滨工业大学电气工程系,黑龙江,哈尔滨,150001 |
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| 摘 要： | 针对传统PWM方波控制方法受开关频率限制,很难应用于某些小电感方波无刷电机驱动场合,提出了一种倍频PWM控制方法.这种方法力图在功率开关的开关频率不变的情况下,使永磁无刷电动机绕组的充放电频率提高为开关频率的二倍,减小绕组电流波动,改善绕组电流波形.分析了倍频PWM控制方法的工作原理,采用XC886为主控芯片实现了对一个相电感为125μH永磁无刷电机的倍频PWM控制.实验结果表明绕组的充放电频率升高一倍后,稳态电流的纹波小于10%,绕组的电流波形很接近方波,验证了相关分析的正确性.
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| 关 键 词： | 方波无刷电动机 倍频PWM控制方法 电流波动 |
Double-frequency PWM control scheme for BLDCM |
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| TANG Ping-hua,LIAO Zhi-hui,LI Tie-cai.Double-frequency PWM control scheme for BLDCM[J].Electric Machines and Control,2009,13(3). |
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| Authors: | TANG Ping-hua LIAO Zhi-hui LI Tie-cai |
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| Affiliation: | Department of Electrical Engineering;Harbin Institute of Technology;Harbin 150001;China |
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| Abstract: | This paper proposes a type of double-frequency pulse width modulation(PWM) control scheme which is used to apply in the drive case of rectangular brushless DC motor(BLDCM) with little induction which is difficult to be well controlled with traditional PWM control scheme because the switch frequency is not high enough.The winding current waveform whose charge/discharge frequency is double to switch frequency can be improved with the proposed double-frequency PWM control scheme,because winding current ripple ... |
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| Keywords: | rectangular brushless DC motors double-frequency pulse width modulation control scheme current ripple |
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