Modeling and Optimization of Power Module for 48V High Power Inverter

Tadej Skuber


The paper presents simulation and measurement results of high current three-phase inverter power modules used in 48V motor application. Firstly, FEM (Finite Element Method) is used to extract circuit parasitics. With the inclusion of MOSFET and passive component SPICE models, highly accurate simulation model is created. Switching characteristics of power module are simulated at 300 A load current and 48 V battery voltage. Thermal simulations estimate maximum transistor temperatures at given power losses. Electrical simulations are compared to actual measurements under identical test conditions. Comparison shows good matching between simulations and measurements. The phase voltage rise and fall times are the same in simulations and measurements. The overshoot voltages are also the same in both cases, around 28 V. The mismatch can be found in the currents of secondary loops. The gate voltage signal is similar with small mismatch of Miller plateau voltage, due to transistor model parameters mismatch.


power module; FEM analysis; thermal analysis; MOSFET

Full Text:



“Motor drives application examples”,, [Accessed: 13. 5. 2021]

F. Herrmann, F. Rothfuss, “Introduction to hybrid electric vehicles, battery electric vehicles, and off-road electric vehicles”, Advances in Battery Technologies for Electric Vehicles, Woodhead Publishing, 2015, pp. 3-16,

S. Shin, B. Jin, K. Song, S. Oh and T. Yim, "Develop-ment of New 600 V Smart Power Module for Home Appliances Motor Drive Application," PCIM Europe 2018; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable En-ergy and Energy Management, 2018, pp. 1-6.

S. Tidblad, L. Mikael, A. Torbjörn, Thiringer Emma Arfa Grunditz and B. E. Mellander, “Vehicle compo-nents and configurations”, Systems Perspectives on Electromobility, 2013, pp. 22-32, [Accessed: 28. 4. 2021]

J. Crosse, Under skin why modern cars need 48v electrical systems,, [Accessed: 28. 4. 2021]

OptiMOS™ 5 80V/100V,, [Accessed: 13. 5. 2021]

SiC MOSFETs: Gate Drive Optimization,,[Accessed: 28. 4. 2021]

IGBTs,,[Accessed: 28. 4. 2021]

J. Huang et al., "A Hybrid Electric Vehicle Motor Cooling System—Design, Model, and Control," in IEEE Transactions on Vehicular Technology, vol. 68, no. 5, pp. 4467-4478, May 2019, doi: 10.1109/TVT.2019.2902135

Sheng, W.W., & Colino, R.P. (2004). Power Elec-tronic Modules: Design and Manufacture (1st ed.). CRC Press.

Y. Ren et al., "Voltage Suppression in Wire-Bond-Based Multichip Phase-Leg SiC MOSFET Module Using Adjacent Decoupling Concept," in IEEE Transactions on Industrial Electronics, vol. 64, no. 10, pp. 8235-8246, Oct. 2017, doi: 10.1109/TIE.2017.2714149.

Lutz, J., Schlangenotto, H., Uwea, S., and De Doncker, “Semiconductor Power Devices” , Springer International Publishing, 2018, doi: 10.1007/978-3-319-70917-8

Double-pulse test substantiated advantages of PrestoMOS,, [Accessed: 28. 4. 2021]

S. Bęczkowski, A. B. Jørgensen, H. Li, C. Uhrenfeldt, X. Dai and S. Munk-Nielsen, "Switching current imbalance mitigation in power modules with parallel connected SiC MOSFETs," 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017, pp. P.1-P.8, doi: 10.23919/EPE17ECCEEurope.2017.8099245.

AN11160 Designing RC snubbers,, [Accessed: 28. 4. 2021]

S. Li, L. M. Tolbert, F. Wang and F. Z. Peng, "Stray Inductance Reduction of Commutation Loop in the P-cell and N-cell-Based IGBT Phase Leg Module," in IEEE Transactions on Power Electronics, vol. 29, no. 7, pp. 3616-3624, July 2014, doi: 10.1109/TPEL.2013.2279258.

A. B. Jørgensen, S. Bęczkowski, C. Uhrenfeldt, N. H. Petersen, S. Jørgensen and S. Munk-Nielsen, "A Fast-Switching Integrated Full-Bridge Power Module Based on GaN eHEMT Devices," in IEEE Transactions on Pow-er Electronics, vol. 34, no. 3, pp. 2494-2504, March 2019, doi: 10.1109/TPEL.2018.2845538.

Y. Ren, X. Yang, F. Zhang, L. Tan and X. Zeng, "Analysis of a low-inductance packaging layout for Full-SiC power module embedding split damping," 2016 IEEE Applied Power Electronics Conference and Exposi-tion (APEC), 2016, pp. 2102-2107, doi: 10.1109/APEC.2016.7468157.

PSpice Libraries for OptiMOS3 n-Channel Power Transistors,, [Ac-cessed: 28. 4. 2021]



  • There are currently no refbacks.

Copyright (c) 2021 Tadej Skuber

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.