Tech Briefs Magazine - December 2023 - BET-9

Modeling Considerations
for Optimizing EV Motors
Certain aspects of electric vehicle (EV) motors need to be carefully investigated and
optimized, such as the torque and temperature rise. The most effective way to perform such
analysis and optimization is by using multiphysics modeling and simulation.
Figure 1. An electric
motor modeled in the
COMSOL Multiphysics® software.
This model shows the
magnetic flux density in the laminated
iron and the current density in the
stator hairpin conductors. (Image: COMSOL)
O
ptimizing
EV motors before
they hit the market is crucial. As the
demand for clean energy vehicles grows,
customers need assurance that their chosen
vehicle is reliable and fulfills sustainability
promises. The best way to accomplish this is to use multiphysics
modeling and simulation during the optimization process
(Figure 1). For the engineer working on the optimization,
there are several modeling aspects that are important to
consider when it comes to EV motors. We will dive into these
considerations here.
Battery & Electrification Technology, December 2023
Investigating Torque and Iron Thickness
When starting the optimization process for an EV motor model,
particularly a compact permanent magnet (PM) motor, it is essential
to find a balance between compactness and efficiency, as
these factors conflict. Achieving efficiency goals while limiting
the size of machine components is challenging.
Efficiency equates to less energy consumption, and finding a
way to limit this involves examining the motors' current loading,
which represents the amount of current applied to the stator
winding. In a PM motor, the magnetic fields generated by the
rotor magnets and the stator current rotate in synchronization.
The interaction between these magnetic fields generates the
9

Tech Briefs Magazine - December 2023

Table of Contents for the Digital Edition of Tech Briefs Magazine - December 2023

Tech Briefs Magazine - December 2023 - Intro
Tech Briefs Magazine - December 2023 - Sponsor
Tech Briefs Magazine - December 2023 - Cov1
Tech Briefs Magazine - December 2023 - Cov2
Tech Briefs Magazine - December 2023 - 1
Tech Briefs Magazine - December 2023 - 2
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Tech Briefs Magazine - December 2023 - 4
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Tech Briefs Magazine - December 2023 - 40
Tech Briefs Magazine - December 2023 - 41
Tech Briefs Magazine - December 2023 - Cov4
Tech Briefs Magazine - December 2023 - MD-Cov1
Tech Briefs Magazine - December 2023 - MD-Cov2
Tech Briefs Magazine - December 2023 - MD-1
Tech Briefs Magazine - December 2023 - MD-2
Tech Briefs Magazine - December 2023 - MD-3
Tech Briefs Magazine - December 2023 - MD-4
Tech Briefs Magazine - December 2023 - MD-5
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Tech Briefs Magazine - December 2023 - MD-7
Tech Briefs Magazine - December 2023 - MD-8
Tech Briefs Magazine - December 2023 - MD-9
Tech Briefs Magazine - December 2023 - MD-10
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Tech Briefs Magazine - December 2023 - MD-16
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Tech Briefs Magazine - December 2023 - MD-18
Tech Briefs Magazine - December 2023 - MD-19
Tech Briefs Magazine - December 2023 - MD-20
Tech Briefs Magazine - December 2023 - MD-21
Tech Briefs Magazine - December 2023 - MD-Cov4
Tech Briefs Magazine - December 2023 - BET-CoverFlap
Tech Briefs Magazine - December 2023 - BET-Cov1B
Tech Briefs Magazine - December 2023 - BET-Cov1
Tech Briefs Magazine - December 2023 - BET-Cov2
Tech Briefs Magazine - December 2023 - BET-1
Tech Briefs Magazine - December 2023 - BET-2
Tech Briefs Magazine - December 2023 - BET-3
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Tech Briefs Magazine - December 2023 - BET-9
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Tech Briefs Magazine - December 2023 - BET-16
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Tech Briefs Magazine - December 2023 - BET-19
Tech Briefs Magazine - December 2023 - BET-20
Tech Briefs Magazine - December 2023 - BET-21
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Tech Briefs Magazine - December 2023 - BET-24
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Tech Briefs Magazine - December 2023 - BET-31
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Tech Briefs Magazine - December 2023 - BET-33
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Tech Briefs Magazine - December 2023 - BET-35
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Tech Briefs Magazine - December 2023 - BET-37
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Tech Briefs Magazine - December 2023 - BET-39
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Tech Briefs Magazine - December 2023 - BET-42
Tech Briefs Magazine - December 2023 - BET-Cov3
Tech Briefs Magazine - December 2023 - BET-Cov4
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