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一种用于移相全桥变换器共模传导EMI抑制的新型驱动电源配置

A New Gate Drive Power Supply Configuration for Common Mode Conducted EMI Reduction in Phase-Shifted Full-Bridge Converter

语言:

中文摘要

本文提出了一种级联驱动电源配置,旨在降低移相全桥(PSFB)变换器中的共模(CM)电流。PSFB变换器中存在多个由驱动电源及控制信号隔离单元的寄生电容引起的dV/dt源,该配置通过优化驱动电源结构,有效抑制了这些寄生路径产生的共模干扰。

English Abstract

This article presents a cascaded gate drive power supply configuration to reduce the common mode (CM) current in phase-shifted full-bridge (PSFB) converters. In such converters, there are at least two $dV/dt$ sources generated at different floating points associated to the parasitic capacitances of the isolated barriers of the gate drivers (power supplies, and control signal isolation units), whic...
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SunView 深度解读

该技术对阳光电源的核心产品线具有重要价值。移相全桥(PSFB)拓扑广泛应用于阳光电源的组串式逆变器DC-DC级以及PowerTitan/PowerStack储能变流器(PCS)的隔离DC-DC环节。随着功率密度提升和开关频率增加,EMI问题已成为产品认证和电磁兼容设计的难点。该级联驱动电源配置方案能有效降低高频共模噪声,有助于减小滤波器体积,提升系统功率密度,并降低对PCB布局和磁性元件的严苛要求,建议研发团队在下一代高功率密度储能变流器设计中评估该方案的可行性。