Study on the resonant HF DC/DC Converter for the weight reduction of the Auxiliary Power Supply of MAGLEV

자기부상열차 보조전원장치 경량화를 위한 공진형 HF DC/DC Converter

연구

Study on the resonant HF DC/DC Converter for the weight reduction

of the Auxiliary Power Supply of MAGLEV

이경복 임지영* 조정민** 김진수*** 한영재** 최성호****

Kyoung-Bok Lee Ji-Young Lim Jeong-Min Jo Jin-Su Kim Young-Jae Han Sung-Ho Choi

ABSTRACT

One of the major trends in traction power electronics is increasing the switching frequencies. The advances in the frequency elevation have made it possible to reduce the total size and weight of the passive components such as capacitors, inductors and transformers in the DC/DC converter and hence to increase the power density. The traction dynamic performance is also improved. This document describes several aspects relating to the design of resonant DC/DC converter operating at high frequency(10KHz) and the converter topologies and the control method of MAGLEV, which result in soft switching, are discussed.

L1 Input Vdc IGBT1 IGBT3 IGBT2 IGBT4 TR1 MC1 C1 C2 R1 R2 C3 D1 D2 Output Vdc R3 R4 R5 R6 A B C 1826

0.04004 0.04005 0.04006 0.04007 0.04008 0 200 400 600 800 1000 0 50 100 150 200 250 300

Current through IGBT

Voltage across IGBT

V ol ta ge [V ] Time [sec] C ur re nt [A ] 1828

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8. Primary transformer voltage and current, Output DC voltage and current

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9. Input DC voltage and current, output DC voltage and current