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The inductor current of a current mode controlled ZVS half bridge pulse width modulation (PWM) converter contains high-frequency components. The low-frequency model of the converter, however, cannot predict the high-frequency components. The output voltage equation for the ZVS half-bridge PWM converter is derived from the steady-state analysis, and the sampling gain presented in the current control loop is investigated to improve the prediction performance of the low-frequency model of a ZVS half-bridge PWM converter.
Date of Publication: 7 Nov. 2003