基于逆算符方法的谐波注入式SPWM技术

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Abstract It is difficult to apply natural-sampled harmonic-injection SPWM (HISPWM) method in digital real-time control because its switch-points are expressed in transcendental equations. This paper tries to deduce the analytical expression of the third harmonic injection SPWM’s switch- points by inverse operator method, and gives the precision analysis examples for the analytical solutions of natural-sampled HISPWM’s switchpoints at different carrier ratio. The results show the switch-points can be expressed in a series of adomian polynomials. The precision of HISPWM switch-points is depended on how many adomian polynomial terms are used in the calculation, which provide theoretical basis for the application of HISPWM efficiently in practice.

Key words： Inverters natural-sampling SPWM (NSPWM) harmonic-injection SPWM (HISPWM) inverse operator method

Received: 07 March 2011 Published: 20 March 2014

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TM464

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	Zheng Chunfang
	Zhang Bo
	Qiu Dongyuan
	Xu Xiangmin

Cite this article:

Zheng Chunfang,Zhang Bo,Qiu Dongyuan等. The Harmonics-Injection SPWM Technique Based on the Inverse Operator Method[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 191-196.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/191

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