王爱玲,秦晓明.基于LC谐振的叠层母排杂散电感测量的新方法[J].电测与仪表,2014,51(16):. WANG Ai-ling,QIN Xiao-ming.A Novel Measuring Method of Busbar Stray Inductance Based on LC Resonance[J].Electrical Measurement & Instrumentation,2014,51(16):.
基于LC谐振的叠层母排杂散电感测量的新方法
A Novel Measuring Method of Busbar Stray Inductance Based on LC Resonance
Traditional measuring method of busbar stray inductance is based on the voltage overshoot and the switching off current slew rate, and the accuracy is difficult to guarantee. Therefore, an accurate measuring method based on LC resonance was proposed. A snubber capacitor was placed in parallel with the IGBT bridge, and the upper transistor was shorted with a linear inductor. The busbar stray inductor and the snubber capacitor formed a second-order LC resonance loop by controlling the switching of the lower transistor. Since the resonant period and the snubber capacitance could be accurately measured, the stray inductance could then be calculated. Finally, the method was used to measure the stray inductance of a H bridge inverter, and the experimental result verifies the accuracy of the proposed method.
