3D CHT Simulation of Oil-Cooled Electric Motors: A Comparative Study of Standard and Paperless Designs Simerics Incorporated

Format:

Book

Conference/Event

Author/Creator:

Varghese, Joel, author.

Contributor:

Bhunia, Srijohn

Chen, Yawei

Schlautman, Jeff

Srinivasan, Chiranth

Conference Name:

WCX SAE World Congress Experience (2025-04-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

Conjugate heat transfer (CHT) analysis of electric motor cooling was performed, simulating both the standard and paperless stator designs, using the CFD software Simerics-MP+ to assess the predictive accuracy of the numerical simulations. The condition investigated involved the motor operating at 14,000 RPM. This high rotor speed was modeled using a novel hybrid approach for mesh rotation to make the problem more tractable. Oil and air, the two immiscible fluids, were modeled using the explicit interface-capturing Volume of Fluid (VOF) method. The traditional CHT approach is computationally expensive for electric motor cooling applications due to the heat transfer time scale differences between the fluid and the solid. Temperature changes in solids occur over a much slower time scale owning to their higher thermal inertia compared to fluids. Therefore, we model the fluid and solid domains separately and use a mixed-time scale approach to exchange the heat transfer data between them. The heat transfer analysis conducted here is a quasi-steady state simulation. Numerical results for both the standard and paperless stator design were compared against the thermocouple measurements from test and showed very good agreement

Notes:

Vendor supplied data

Publisher Number:

2025-01-8181

Access Restriction:

Restricted for use by site license