A Novel Filter Design for Output LC Filters of PWM Inverters

Hyosung Kim; Seung-Ki Sul

A Novel Filter Design for Output LC Filters of PWM Inverters

Hyosung Kim

Seung-Ki Sul

Vol. 11, No. 1, pp. 74-81, Jan. 2011

10.6113/JPE.2011.11.1.74

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Abstract

The cutoff frequency of the output LC filters of PWM inverters limits the control bandwidth of the converter system while it attenuates voltage ripples that are caused by inverter switching activities. For a selected cutoff frequency of an output LC filter, an infinite number of L-C combinations is possible. This paper analyses the characteristics of output LC filters for PWM inverters terms of the L-C combinations. Practical circuit conditions such as no-loads, full resistive-loads, and inductive-load conditions are considered in the analysis. This paper proposes a LC filter design method for PWM inverters considering both the voltage dynamics and the inverter stack size. An experimental PWM inverter system based on the proposed output LC filter design guideline is built and tested.

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Cite this article

[IEEE Style]

H. Kim and S. Sul, "A Novel Filter Design for Output LC Filters of PWM Inverters," Journal of Power Electronics, vol. 11, no. 1, pp. 74-81, 2011. DOI: 10.6113/JPE.2011.11.1.74.

[ACM Style]

Hyosung Kim and Seung-Ki Sul. 2011. A Novel Filter Design for Output LC Filters of PWM Inverters. Journal of Power Electronics, 11, 1, (2011), 74-81. DOI: 10.6113/JPE.2011.11.1.74.