A Totem-pole PFC with Re-rush Current Control, Accurate E-metering, Low iTHD and High Power Density

This paper proposed novel control algorithms and design approaches for a high-performance power factor correction (PFC) design: A relay and PFC control algorithm is proposed to handle the re-rush current when AC comes back from a dropout event. An e-meter function is integrated with PFC control usin...

Full description

Saved in:
Bibliographic Details
Main Authors: Sun, Bosheng, Yu, Sheng-Yang, Huh, Ted
Format: Conference Proceeding
Language:English
Subjects:
AC drop
baby boost
Current control
Density measurement
e-meter
M-CRPS
Microcontrollers
PFC
Power supplies
Power system measurements
Pulse width modulation
THD
Total harmonic distortion
totem-pole
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper proposed novel control algorithms and design approaches for a high-performance power factor correction (PFC) design: A relay and PFC control algorithm is proposed to handle the re-rush current when AC comes back from a dropout event. An e-meter function is integrated with PFC control using a single current sensor and a single microcontroller (MCU) for both e-metering and PFC control, eliminating the traditional dedicated metering device, and achieving 0.3% accuracy. An AC cycle skipping algorithm along with PWM soft start scheme after AC zero-crossing, and a method to eliminate the voltage loop double line frequency ripple are introduced to reduce total harmonic distortion (iTHD) and meet the strict iTHD specification in the recently released Modular Hardware System - Common Redundant Power Supply (M-CRPS) specification. A baby boost converter is added between PFC and the following isolated DC/DC converter stages to reduce bulk capacitor capacitance, increase power density and maintain hold up time. These algorithms are implemented in a 3kW totem-pole bridgeless PFC design, test results show it meets the M-CRPS specification.
ISSN:2470-6647
DOI:10.1109/APEC48139.2024.10509238