| 减小无刷直流电机转矩脉动的PWM新方式 |
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| 引用本文： | 李自成,程善美,蔡凯,秦忆.减小无刷直流电机转矩脉动的PWM新方式[J].华中科技大学学报(自然科学版),2009(11). |
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| 作者姓名： | 李自成 程善美 蔡凯 秦忆 |
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| 作者单位： | 华中科技大学控制科学与工程系;武汉工程大学电气信息学院; |
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| 基金项目： | 国家自然科学基金资助项目(60603053) |
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| 摘 要： | 在分析无刷直流电机两两导通双极性脉宽调制(PWM)方式的基础上,提出一种改进的双极性PWM无刷直流电机(BLDCM)控制方式,该方式采用4个功率管同时进行PWM控制,其中同一桥臂上下两个功率管处于互补导通模式.分析了该PWM方式对无刷直流电机续流过程及电磁转矩的影响,与传统的双极性PWM方式相比,采用该双极性PWM方式可以减小转矩脉动,低速时平稳性好,并且适用于快速启、制动和频繁正反转场合.仿真和实验结果表明该双极性PWM方式能够显著改善无刷直流电机的转矩脉动问题.
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| 关 键 词： | 无刷直流电机 脉宽调制 转矩控制 数字信号处理器 仿真 |
Novel PWM scheme for reducing torque ripples in brushless DC motors |
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| Li Zicheng, Cheng Shanmei Cai Kai Qin Yi.Novel PWM scheme for reducing torque ripples in brushless DC motors[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2009(11). |
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| Authors: | Li Zicheng Cheng Shanmei Cai Kai Qin Yi |
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| Institution: | Li Zicheng1,2 Cheng Shanmei1 Cai Kai1 Qin Yi1 (1 Department of Control Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China,2 School of Electrical and Information Engineering,Wuhan Institute of Technology,Wuhan 430073,China) |
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| Abstract: | On the basis of the traditional bipolar pulse width modulation(PWM) control method,a novel improved bipolar PWM scheme used in brushless DC motors(BLDCM) is proposed,in which four power transisitors are controlled simultaneously by PWM signals and the on-off states of two power transistors in one phase leg are opposite.In addition,the process of currents flowing and infection of magnetic torque in proposed PWM method are analyzed.Compared with the traditional bipolar PWM method,this scheme can reduce torque... |
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| Keywords: | brushless DC motors pulse width modulation torque control digital signal processors simulation |
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