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학술지 Power Module Stray Inductance Extraction: Theoretical and Experimental Analysis
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저자
정동윤, 장현규, 조두형, 권성규, 원종일, 이성현, 박건식, 임종원, 배정환, 최윤화
발행일
202110
출처
ETRI Journal, v.43 no.5, pp.891-899
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2020-0420
협약과제
20PU1200, 1700V/250A급 저손실 Full-SiC Half-bridge Power Module 개발, 정동윤
초록
We propose a stray inductance extraction method on power modules of the few-kilovolts/several-hundred-amperes class using only low voltages and low currents. The method incorporates a double-pulse generator, a level shifter, a switching device, and a load inductor. The conventional approach generally requires a high voltage of more than half the power module's rated voltage and a high current of around half the rated current. In contrast, the proposed method requires a low voltage and low current environment regardless of the power module's rated voltage because the module is measured in a turn-off state. Both theoretical and experimental results are provided. A physical circuit board was fabricated, and the method was applied to three commercial power modules with EconoDUAL3 cases. The obtained stray inductance values differed from the manufacturer-provided values by less than 1.65 nH, thus demonstrating the method's accuracy. The greatest advantage of the proposed approach is that high voltages or high currents are not required.
KSP 제안 키워드
Circuit Board, Double-pulse, Extraction method, High Voltage, High current, Inductance extraction, Level shifter, Low current, Off-State, Pulse Generator, Stray inductance
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