基于等面积法的多电平逆变器SPWM方法

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Abstract According to the impulse principle and the relative location of baricenter of PWM signal and reference signal in a section, take an five-level inverter for example, three typical PWM schemes are investigated to examine the variation of harmonics contents and fundamental control precision with the location of the baricenter of the PWM waveform in a section at a low switching frequency for PWM method of quarter wave symmetry. Based on the investigation, a novel optimum digital PWM scheme is proposed. The advantages of the new PWM method include easiness for calculating and programming, high flexibility, high quality in output waveform, high precision in fundamental control and so on. The new PWM method is not restricted to the topology and number of output levels of the multilevel inverters, and can be used in all kinds of multilevel inverters. Take five-level inverter as an example, the new PWM method is investigated by simulation and experiment. The results agree with each other very well and prove the validity, advantages and practicability.

Key words： Multilevel inverter pulse width modulation harmonics fundamental control

Received: 20 January 2009 Published: 04 March 2014

PACS:

TM464

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	Articles by authors
	Fei Wanmin
	Du Xiaoli
	Ju Rong
	Wu Qin

Cite this article:

Fei Wanmin,Du Xiaoli,Ju Rong等. A Novel PWM Method for Multilevel Inverters[J]. Transactions of China Electrotechnical Society, 2010, 25(3): 89-96.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2010/V25/I3/89

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