| 各种PWM控制方式下的电机共模电压比较研究 |
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| 引用本文： | 刘建强,郑琼林.各种PWM控制方式下的电机共模电压比较研究[J].北京交通大学学报(自然科学版),2005,29(5):98-102. |
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| 作者姓名： | 刘建强 郑琼林 |
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| 作者单位： | 北京交通大学电气工程学院,北京100044 |
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| 摘 要： | 研究了不同PWM控制方式下电机共模电压、轴电压和轴承电流的产生机理,建立了脉宽调制逆变器驱动系统共模回路的等效电路,并由此得到轴电压的计算公式.为研究不同PWM控制方式对电机共模电压的影响,建立了电机共模电压仿真模型,比较了在三种PWM控制方式下电机共模电压的仿真波形,通过对仿真结果的对比分析得到了在SPWM控制方式下电机共模电压最小的结论,为逆变器采用哪种控制方式会有最小的轴电压和轴承电流提供了一定依据.
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| 关 键 词： | 共模电压 轴电压 轴承电流 SPWM CRS-PWM SVPWM 逆变器 控制方式 电机 共模电压 电压比较 研究 Methods PWM Control Different Voltage Motor Comparison 脉宽调制逆变器 最小 SPWM 分析 仿真结果 仿真波形 仿真模型 影响 计算公式 |
| 文章编号： | 1673-0291（2005）05-0098-05 |
| 收稿时间： | 2005-01-11 |
| 修稿时间： | 2005-01-11 |
Study and Comparison of the Common-Mode Motor Voltage in Different Kinds of PWM Control Methods |
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| LIU Jian-qiang,Trillion Q. Zheng.Study and Comparison of the Common-Mode Motor Voltage in Different Kinds of PWM Control Methods[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2005,29(5):98-102. |
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| Authors: | LIU Jian-qiang Trillion Q Zheng |
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| Institution: | School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | This paper investigates the mechanism and form of the common-mode voltage, shaft voltage and bearing current in different kinds of PWM control methods, and sets up a common-mode equivalent circuit for PWM inverter drive system. Consequently, the formula of the shaft voltage is obtained. In order to study the effect to common-mode voltage with different kinds of PWM control methods, we simulate the common-mode voltage model. The simulated waves of common-mode voltage with three kinds of PWM control methods are compared, and it is found that the lowest common-mode voltage is with the SPWM control method. The result provides some warrant for reducing the shaft voltage and bearing current when chosing PWM control methods. |
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| Keywords: | common-mode voltage shaft voltage bearing current SPWM CRS-PWM SVPWM inverter |
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