Decoupling of interaction between WBG converter and motor load for switching performance improvement
Decoupling of interaction between WBG converter and motor load for switching performance improvement
复制标题
解耦 WBG 转换器和电机负载之间的相互作用，以提高开关性能
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Costinett
中科院分区：
文献类型：
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作者：
Zheyu Zhang;Fred Wang;L. Tolbert;B. Blalock;D. Costinett
WBG器件的高速开关使得它们的开关行为对电路中的寄生效应（包括电感负载）高度敏感。PWM逆变器中由电机和电缆组成的感性负载会显著提高SiC MOSFET的开关速度和损耗。本文针对电机加电力电缆的感性负载，旨在减轻其在开关瞬态过程中的负面影响。在变换器和感性负载之间设计了一个辅助滤波器，这样在开关瞬态过程中，从变换器侧就不会看到负载的寄生效应。Cree 1200-V/20-A SiC MOSFET的测试结果表明，拟议的辅助电感能够在实际感性负载（例如，电动机加基于电缆的感应负载），以表现出接近于采用最佳设计的双脉冲测试负载电感器时的行为。
High speed switching of WBG devices causes their switching behavior to be highly susceptible to the parasitics in the circuit, including inductive loads. An inductive load consisting of a motor and power cable significantly worsens the switching speed and losses of SiC MOSFETs in a PWM inverter. This paper focuses on the motor plus power cable based inductive load, and aims at mitigating its negative influence during the switching transient. An auxiliary filter is designed and inserted between the converter and inductive load so that the parasitics of the load will not be “seen” from the converter side during the switching transient. Test results with Cree 1200-V/20-A SiC MOSFETs show that the proposed auxiliary inductor enables the switching performance with a practical inductive load (e.g., motor plus cable based inductive load) to exhibit behavior close to that when the optimally-designed double pulse test load inductor is employed.