Improved Bridgeless Interleaved Boost PFC Rectifier with Optimized Magnetic Utilization and Reduced Sensing Noise

Guoen Cao; Hee-Jun Kim

Improved Bridgeless Interleaved Boost PFC Rectifier with Optimized Magnetic Utilization and Reduced Sensing Noise

Guoen Cao

Hee-Jun Kim

Vol. 14, No. 5, pp. 815-826, Sep. 2014

10.6113/JPE.2014.14.5.815

Power factor correction (PFC)

Soft switching

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Abstract

An improved bridgeless interleaved boost power factor correction (PFC) rectifier to improve power efficiency and componentutilization is proposed in this study. With combined conventional bridgeless PFC circuit and interleaved technology, the proposedrectifier consists of two interleaved and magnetic inter-coupling boost bridgeless converter cells. Each cell operates alternatively inthe critical conduction mode, which can achieve the soft-switching characteristics of the switches and increase power capacity. Auxiliary blocking diodes are employed to eliminate undesired circulating loops and reduce current-sensing noise, which are amongthe serious drawbacks of a dual-boost PFC rectifier. Magnetic component utilization is improved by symmetrically coupling twoinductors on a unique core, which can achieve independence from each other based on the auxiliary diodes. Through the interleavedapproach, each switch can operate in the whole line cycle. A simple control scheme is employed in the circuit by using aconventional interleaved controller. The operation principle and theoretical analysis of the converter are presented. A 600 Wexperimental prototype is built to verify the theoretical analysis and feasibility of the proposed rectifier. System efficiency reaches97.3% with low total harmonic distortion at full load.

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Cite this article

[IEEE Style]

G. Cao and H. Kim, "Improved Bridgeless Interleaved Boost PFC Rectifier with Optimized Magnetic Utilization and Reduced Sensing Noise," Journal of Power Electronics, vol. 14, no. 5, pp. 815-826, 2014. DOI: 10.6113/JPE.2014.14.5.815.

[ACM Style]

Guoen Cao and Hee-Jun Kim. 2014. Improved Bridgeless Interleaved Boost PFC Rectifier with Optimized Magnetic Utilization and Reduced Sensing Noise. Journal of Power Electronics, 14, 5, (2014), 815-826. DOI: 10.6113/JPE.2014.14.5.815.