Variable Switching Frequency Pulse Width Modulation for Induction Motors Based on Current Ripple Peak Value

被引：0
|
作者：
Huang P. [1 ]
Liu H. [1 ]
Miao Y. [1 ]
You X. [1 ]
Guo Q. [2 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
[2] Energy Internet Engineering Research Center of Chongqing, Chongqing University of Technology, Chongqing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2020年 / 35卷 / 20期
关键词：
Current ripple; Induction motor; Switching losses; Variable switching frequency pulse width modulation;
D O I：
10.19595/j.cnki.1000-6753.tces.191209
中图分类号：
学科分类号：
摘要：
Compared with the widely used constant switching frequency pulse-width-modulation (CSFPWM) method, variable switching frequency pulse width modulation (VSFPWM) can be used to reduce current power spectral density (PSD) peak values to a certain extent, thereby reducing the narrowband noise of induction motor and suppressing the conducted EMI. In this paper, the analytical expression of stator current ripple peak of induction motor is derived based on coordinate transformation. According to the expression, a VSFPWM strategy for reducing switching loss is proposed, that is, the switching frequency varies within a fundamental cycle to reduce the switching loss of a two-level inverter while maintaining the current ripple peak value within a predefined limit. The theoretical analysis and simulation are carried out, and a 15kW induction motor control platform is built. By analyzing the stator current and the temperature rise of MOSFETs, the feasibility and effectiveness of the variable switching PWM modulation strategy are verified. © 2020, Electrical Technology Press Co. Ltd. All right reserved.
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页码：4373 / 4383
页数：10
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