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| Zero-Crossing Distortion in Single-Phase Boost PFC Converters Using Average Current Control |
| Wang Shaoyong, Zhang Fanghua |
| Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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Abstract Active power factor corrected converters usually use an input filter capacitor to absorb the switching ripples and noises. The input filter capacitor current is very significant at the medium frequency(360～800Hz). The current of the input filter capacitor leads the input voltage by 90°, so that the power factor is very poor. At the same time the current loop introduces a leading phase at the medium frequency. This paper analyzes the effects of the DC input filter capacitor and the current loop and points out that the DC input filter capacitor is a very important cause of zero crossing distortion. On this base, the paper proposes a method to cancel the leading phase of the capacitor and the current loop, and to reduce the total harmonics distortion and make unity power factor approximately.
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Received: 25 August 2009
Published: 07 March 2014
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2011, Vol. 26 
