Open AccessPower module stray inductance extraction: Theoretical and experimental analysis
Author(s) -
Jung Dong Yun,
Jang Hyun Gyu,
Cho Doohyung,
Kwon Sungkyu,
Won Jong Il,
Lee Seong Hyun,
Park Kun Sik,
Lim JongWon,
Bae Joung Hwan,
Choi Yun Hwa
Publication year - 2021
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.2020-0420
Subject(s) - inductance , voltage , electrical engineering , power (physics) , generator (circuit theory) , engineering , pulse generator , electronic engineering , physics , quantum mechanics
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.