Adaptive Charge-Compensation-Based Variable On-Time Control to Improve Input Current Distortion for CRM Boost PFC Converter

Xinjun Liu, Donglai Zhang, Wanyang Wang, Fanwu Zhang, Jun Yuan and Ningyu Liu
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Xinjun Liu: Department of Electrical Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Donglai Zhang: Department of Electrical Engineering, Harbin Institute of Technology, Shenzhen 518055, China
Wanyang Wang: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Fanwu Zhang: Dongfeng Motor Corporation Technical Center, Wuhan 430074, China
Jun Yuan: Hubei Jiufengshan Laboratory, Wuhan 430074, China
Ningyu Liu: Hubei Jiufengshan Laboratory, Wuhan 430074, China

Energies, 2022, vol. 15, issue 11, 1-18

Abstract: For boost power factor correction (PFC) converters operating in critical conduction mode (CRM), charge compensation strategies are utilized to improve input current distortion. However, since massive calculations are required under complex working conditions, it is difficult to achieve accurate charge compensation with limited real-time computing resources. To solve this issue, this paper proposes an adaptive charge-compensation-based variable on-time (ACVOT) control strategy. The ACVOT controller calculates the required switching on-time by adding a fundamental value and an extended on-time. The fundamental value is adjusted by the loop compensator in each half-line cycle to provide a basic bias. The extended on-time is calculated based on partial charge compensation equation in each switching cycle to reduce the distortion. Compared with conventional digital variable on-time (VOT) control, the proposed strategy improves the input current total harmonics distortion (THD) and reduces the LUT/register resources by 54%/43% in FPGA realization. To verify the effectiveness of the proposed strategy, a 200 W prototype is built using the GaN HEMT transistor, where the THD is reduced to 1.4% at full load.

Keywords: boost power factor correction (PFC); critical conduction mode (CRM); real time; total harmonics distortion (THD); variable on-time (VOT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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