基于感应电机电流纹波峰值的可变开关频率脉冲宽度调制

doi:10.19595/j.cnki.1000-6753.tces.191209

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Abstract 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.

Key words： Induction motor variable switching frequency pulse width modulation current ripple switching losses

Received: 22 September 2019

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TM346

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	Huang Peng
	Liu Heping
	Miao Yiru
	You Xiaoyao
	Guo Qiang

Cite this article:

Huang Peng,Liu Heping,Miao Yiru等. Variable Switching Frequency Pulse Width Modulation for Induction Motors Based on Current Ripple Peak Value[J]. Transactions of China Electrotechnical Society, 2020, 35(20): 4373-4383.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191209 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I20/4373

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