Power module stray inductance extraction: Theoretical and experimental analysis

Autor: Dong Yun Jung, Hyun Gyu Jang, Doohyung Cho, Sungkyu Kwon, Jong Il Won, Seong Hyun Lee, Kun Sik Park, Jong‐Won Lim, Joung Hwan Bae, Yun Hwa Choi
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: ETRI Journal, Vol 43, Iss 5, Pp 891-899 (2021)
Druh dokumentu: article
ISSN: 1225-6463
2020-0420
DOI: 10.4218/etrij.2020-0420
Popis: AbstractWe 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.
Databáze: Directory of Open Access Journals
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