Abstract
Aiming at the shortcomings of the current forward converter, such as low utilization rate of excitation energy, complex circuit structure and single function of magnetic reset technology, a novel secondary side parallel LCD forward converter is proposed. By analyzing the working principle of the proposed converter, the optimal combined working mode is obtained, which can improve the energy transmission efficiency of the converter, ensure high power transmission and reduce the output voltage ripple. The energy transfer process of the optimal mode is deeply analyzed, the input–output relationship and the critical inductance expression in this mode are deduced, and the optimization of the parameters of the capacitor and inductance components in the converter is proposed. Finally, according to the parameter optimization design scheme, a prototype of the secondary side parallel LCD forward converter is developed. The experimental results of the prototype show that the proposed forward converter can not only achieve reliable magnetic reset, but also transmit the excitation energy of the converter to the load side, which effectively improves the efficiency of the converter.
Published Version
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