Addressing high efficiency and high power density applications, as the Totem Pole Power Factor Corrector (PFC) operating in Zero-Voltage Switching (ZVS) and controlled with an advanced Hysteresis Current Control, an analytical model for run-time calculation of the limit values of the hysteresis band and the dead-times is presented. Exploiting the single-channel equivalent circuit in Laplace domain, the exact solution to obtain the ZVS during the resonant transition is first calculated then, to largely reduce the computational burden for each transition, a approximated solution is adopted using Taylor series expansion and equation linearization. The proposed control scheme considering both accurate and approximated transient models have been simulated in MATLAB/Simulink environment and implemented on the STMicroelectronics microcontroller STM32G474. Finally, the experimental results of a converter prototype are presented validating the proposed solution and its implementation, allowing the real evaluation of the computational time savings.

A Novel Closed-Form Analytical Model for Zero-Voltage Switching (ZVS) operation of a Totem Pole PFC with Hysteresis Current Control

M. Torrisi;S. Messina;M. Cacciato
2021-01-01

Abstract

Addressing high efficiency and high power density applications, as the Totem Pole Power Factor Corrector (PFC) operating in Zero-Voltage Switching (ZVS) and controlled with an advanced Hysteresis Current Control, an analytical model for run-time calculation of the limit values of the hysteresis band and the dead-times is presented. Exploiting the single-channel equivalent circuit in Laplace domain, the exact solution to obtain the ZVS during the resonant transition is first calculated then, to largely reduce the computational burden for each transition, a approximated solution is adopted using Taylor series expansion and equation linearization. The proposed control scheme considering both accurate and approximated transient models have been simulated in MATLAB/Simulink environment and implemented on the STMicroelectronics microcontroller STM32G474. Finally, the experimental results of a converter prototype are presented validating the proposed solution and its implementation, allowing the real evaluation of the computational time savings.
2021
978-1-7281-5135-9
Analytical Modeling
Hysteresis Current Control
Taylor's Series Expansion
Totem Pole PFC
ZVS converters
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/537205
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