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http://dx.doi.org/10.6113/JPE.2011.11.1.074

A Novel Filter Design for Output LC Filters of PWM Inverters  

Kim, Hyo-Sung (School of EE & Control Eng., Kongju National University)
Sul, Seung-Ki (School of Electrical Eng., Seoul National University)
Publication Information
Journal of Power Electronics / v.11, no.1, 2011 , pp. 74-81 More about this Journal
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 ynamics and he inverter stack size. An experimental PWM inverter system based on the proposed output LC lter design uideline is built and tested.
Keywords
Cut-off frequency; Inverter size; L-C combination; Output LC filter; PWM inverter;
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Times Cited By Web Of Science : 4  (Related Records In Web of Science)
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