COMPARISON OF THERMAL MANAGEMENT APPROACHES FOR INTEGRATED TRACTION DRIVES IN ELECTRIC VEHICLES

Conference · Thu Oct 01 04:00:00 EDT 2020

DOI:https://doi.org/10.1115/IPACK2020-2524· OSTI ID:1735433

Kekelia, Bidzina ^[1]; Cousineau, Emily ^[1]; Bennion, Kevin ^[1]; Narumanchi, Sreekant ^[1]; Chowdhury, Shajjad ^[2]

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1. National Renewable Energy Laboratory (NREL)
2. ORNL

The continuous push to increase power densities of electric vehicle (EV) traction drive systems necessitates combining electric motor and power electronics into one unit. A single, compact traction drive unit with fewer interconnecting components also facilitates fast, automated assembly of electric vehicles, driving production costs down and enabling wider adoption of EVs. There are a number of challenges associated with the integration of power electronics with the electric machine, including thermal management of the combined traction drive system. However, one important benefit of integration from the thermal management system perspective is the potential for using a single fluid loop instead of two separate cooling systems for the electric machine and the power electronics/inverter.This paper reviews several integration approaches and, employing finite element analysis (FEA), compares thermal management solutions for the combined electric machine and power electronics systems. Namely, three different scenarios are modeled: (1) independent component (motor and power electronics) cooling, which is compared to the combined cooling system approach for (2) radially and (3) axially integrated power electronics modules into the motor enclosure. Temperature distributions for selected thermal loads and thermal resistances from the key heat-generating components to the cooling fluid are compared for each scenario.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1735433
• Country of Publication: United States
• Language: English