Parametric Modelling of Phase-Shifted Full-Bridge Zero Voltage Switching DC-DC Converter
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Date
2021-03
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Publisher
Jordan Journal of Electrical Engineering. All rights reserved-Volume
Abstract
Modelling of switching pulse width modulated phase-shifted full-bridge zero voltage converter is highly challenging due to several transitional stages involved in a complete switching cycle. The circuit averaging technique has been favored in the past three decades considering phase-shifted full-bridge converter as a buckderived converter. This modelling approach requires several assumptions that include zero equivalent series resistance of output capacitor, zero leakage inductance and unity transformer turn ratio which results in a less accurate system dynamics. In this paper, a system identification approach is proposed for obtaining a more accurate model of phase-shifted full-bridge PWM switching converter using the input-output test data. The model parameter estimation is implemented in Simulink environment incorporating all circuit parasitic parameters and the resulting system’s frequency response shows a good agreement when compared with reported measured response.
Description
Keywords
System identification, full-bridge converter, zero voltage swicthing, transfer function, Recursive least square