Accuracy improvement of low-frequency small signal model of current mode controlled zero voltage switching half-bridge PWM converter

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© IEE
Published 30/07/2012

Abstract

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.

Inspec keywords: bridge circuits; electric current control; switching circuits; PWM power convertors

Other keywords: sampling gain; steady-state analysis; ZVS; low-frequency small signal model; low-frequency model; zero voltage switching; pulse width modulation converter; output voltage equation; current mode control; half-bridge PWM converter; current control loop

Subjects: Current control; Power convertors and power supplies to apparatus; Control of electric power systems

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