Design of a Soft-Switching DC Converter for 110V Power Supply in Medium-Low Speed Maglev Trains
ID：104
Submission ID：109 View Protection：ATTENDEE
Updated Time：2025-10-13 11:23:35 Hits：52
Poster Presentation
Start Time：2025-11-09 09:06 （Asia/Shanghai）
Duration：1min
Session：[P] Poster presentation » [P2] 2.Power electronics technology and application
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Abstract
This study presents an innovative DC-DC converter solution employing modular full-bridge soft-switching technology, specifically designed to meet the power supply demands of medium-low speed maglev trains. The proposed solution features an active secondary-clamped ZVZCS-PWM topology that successfully achieves zero-voltage switching (ZVS) in leading bridge arms and zero-current switching (ZCS) in lagging bridge arms, delivering significant reductions in switching losses while effectively suppressing electromagnetic interference. Through optimized integration of EMI filters, high-frequency transformers, and LLC resonant structures - combined with a three-module parallel architecture and maximum current auto-balancing algorithm - the solution not only ensures balanced thermal load distribution but also enhances system current-sharing performance. Simulation results from the Simulink platform demonstrate that the system exhibits: (1) superior soft-switching characteristics, (2) exceptional load-step recovery capability, and (3) optimal current-sharing performance. These findings comprehensively validate the solution's practical value in improving both operational efficiency and reliability for maglev train power supply systems.
Keywords
modularization,DC-DC converter,parallel current sharing,high-frequency converter,maglev train
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