Regular Article |
| ![](/img/icon_oaccess.png) |
Parametric Modelling of Phase-Shifted Full-Bridge Zero Voltage Switching DC-DC ConverterOladimeji Ibrahim, Nor Zaihar B. Yahaya, Nordin Saad, Khairul Nisak Binti Md Hasan, Nahla M. Shannan, Olayinka Sikiru Zakariyya, Abdulrahman Okino Otuoze. 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 buck-derived 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 systems frequency response shows a good agreement when compared with reported measured response.
Key words: System identification; Full-bridge converter; Zero voltage switching; Transfer function; Recursive least square.
|
|
|
|