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Minimum Volume Design of a Forced-Air Cooled Three-Phase Power Factor Correction Stage for Electric Vehicle Chargers

机译:用于电动汽车充电器的强制空气冷却三相功率因数校正阶段的最小体积设计

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This paper describes a volumetric design study, which evaluates switching loss, thermal management and the physical dimensions of all major passive components, including the electromagnetic interference (EMI) input filter, boost inductors and DC-link capacitors, for a three-phase low-voltage power factor correction (PFC) stage for electric vehicle chargers. The proposed design study considers three popular three-phase pulse width modulated (PWM) active front-end AC-DC topologies: the standard 2-level industry solution, the 3-level neutral point clamped (NPC) converter and the 3-level T-type (T2C) converter. For each topology, the pulsating switched phase-leg voltages are computed for both continuous space vector pulse width modulation (SVPWM) and 60° discontinuous pulse width modulation (DPWM). Based on the switched phase-leg voltages, the impact of the modulation technique and switching frequency on switching loss, heatsink and passive components is thoroughly analyzed. For an accurate estimation of the switching loss, the switching energies of state-of-the-art silicon carbide (SiC) MOSFETs have been measured at corresponding operating points. Results are presented for an 11 kW, 800 V active power factor correction (PFC) application.
机译:本文介绍了一项体积设计研究,可评估所有主要无源元件的开关损耗,热管理和物理尺寸,包括电磁干扰(EMI)输入滤波器,升压电感器和直流链路电容器,用于三相低电动车辆充电器的电压功率因数校正(PFC)级。所提出的设计研究考虑了三个流行的三相脉冲宽度调制(PWM)主动前端AC-DC拓扑:标准的2级行业解决方案,3级中性点钳位(NPC)转换器和3级T. -type(t. 2 c)转换器。对于每个拓扑,计算脉动切换的相位腿电压,用于连续空间矢量脉冲宽度调制(SVPWM)和60°不连续脉冲宽度调制(DPWM)。基于开关阶段腿电压,彻底分析了调制技术和开关频率对开关损耗,散热和无源元件的影响。为了精确估计切换损耗,在相应的操作点处测量了最先进的碳化硅(SiC)MOSFET的开关能量。结果显示为11千瓦,800V有源功率因数校正(PFC)应用。

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