Arent Fox LLP
Method for paralleled SiC power switching devices based on wiring optimization
The disclosure provides a design method for paralleled SiC power switching devices based on wiring optimization which belongs to the field of power electronics technology, aiming at the problem that in the existing scheme of paralleled SiC devices, the optimal performance of SiC devices cannot be presented with paralleled multiple SiC devices due to limitations of the unequal switching losses and transient currents. The design method comprises at least three wiring separation slots being arranged in parallel and in sequence on a PCB circuit board; wherein a power half-bridge composed of two SiC devices is arranged in each wiring separation slot, thereby increasing a parasitic inductance between adjacent power half-bridges. The disclosure can improve the current sharing performance of the switching transient current existing in the application of multiple paralleled SiC devices, so that SiC devices can be applied to high-power and high-current power electronic converters stably and reliably.
Harbin Institute of Technology
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Qianfan Jinxin Jianzhen Xue Shumei
Zhang Wang Qu Yuan Cui