Improved Control Strategy for Zero-Crossing Distortion Elimination in Totem-Pole PFC Converter with Coupled Inductor

Abstract

Coupled inductors can effectively optimize the THD, loss, current ripple, and power density of multiphase interleaved totem-pole PFC converters. However, a coupled inductor will also worsen the zero-crossing distortion process. This paper first introduces the working principle of the interleaved totem-pole PFC converter with a coupled inductor based on a detailed analysis of modes, and then analyzes the influence on the zero-crossing process caused by the coupled inductor. To eliminate the zero-crossing distortion caused by the coupled inductor, an improved control strategy and its digital realization method of the totem-pole PFC converter is presented through the system model. Finally, the validity and correctness of the proposed circuit and control are verified in the 7.7 kW interleaved totem-pole PFC converter.

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

“…Interleaving this type of converter allows for the development of even faster charging circuits while also needing improved control strategies to mitigate the switching electrical noise. Coupled inductors were used for this purpose but designs for multiple phases still must be researched to improve performance further [72]. Interleaving this type of converter allows for the development of even faster charging circuits while also needing improved control strategies to mitigate the switching electrical noise.…”

“…Interleaving this type of converter allows for the development of even faster charging circuits while also needing improved control strategies to mitigate the switching electrical noise. Coupled inductors were used for this purpose but designs for multiple phases still must be researched to improve performance further [72].…”