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Novel Digital-Controlled Transition Current-Mode Control and Duty Compensation Techniques for Interleaved Power Factor Corrector

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3 Author(s)
Kung-Min Ho ; Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan ; Chia-An Yeh ; Yen-Shin Lai

A novel digital-controlled transition current-mode control technique for interleaved power factor corrector (PFC) is proposed in this paper. For the presented technique, the switching period to retain zero-current switching is predicted rather than sampling the current in real time. Moreover, the related turn-ON period is determined by the voltage controller. Therefore, neither zero-current detection nor high-frequency A/D converter for current sampling is required. Moreover, for interleaved topology with master-slave control, a new ON-time compensation technique is proposed to significantly improve the slave inductor-current distortion, and thereby, achieving current sharing control between phases. Experimental results derived from a DSP-based controller are presented for confirmation. The PFC is with 100 Vac/50 Hz input and 400 Vdc output. The power rating is 460 W. Experimental results show that the power factor is higher than 0.98, efficiency is greater than 96%, and the current sharing can be achieved by the proposed ON-time compensation technique. These results confirm the aforementioned claims very well.

Published in:

Power Electronics, IEEE Transactions on  (Volume:25 ,  Issue: 12 )

Date of Publication:

Dec. 2010

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