Magnetics Business & Technology - November/December 2023 - 10

FEATURE ARTICLE
In-Wheel Motor Key Component in Hyundai Mobis Electrification Platform
In-wheel permanent magnet motors enable " crab walking " for easy parking with Hyundai Mobis e-Corner System
Hyundai Mobis is going all out to demonstrate its electrificationcentric
vision for the automobile industry, seeking to grow dramatically
as a leading innovator and manufacturer of powertrain
and other systems for electric vehicles. A permanent-magnet
in-wheel motor with associated control system is a key technology
being developed to reach new levels of torque and steering
performance.
Shown above, the company's e-Corner System demo car demonstrates
" crab walking " which lets all four wheels turn 90 degrees
to perform parallel movement. It enables anyone to parallel
park in narrow spaces. The system also features " zero turn " ,
rotating front wheels inside while rear wheels turn outside to perform
360 degrees idle turn, allowing the driver to easily turn the
direction of a vehicle in a limited space with minimum movement.
" Diagonal driving " mode rotates all four wheels to the same direction
at 45 degrees, helping to avoid obstacles or vehicles on
the road smoothly. " Pivot turn " lets the driver choose any point
for central axis to rotate the vehicle accordingly, like drawing a
circle using a compass.
The in-wheel system, which the company recently announced
that it has succeeded in developing in-house, lets the motor control
each wheel directly. Hyundai Mobis says it stands as the latest
technology with no record of being mass-produced anywhere
in the world.
It is among more than 20 production-ready advancements in
electrification and automotive components that the company
plans to showcase beginning with the IAA Mobility 2023 Show,
running from September 5-10 in Munich, followed by other top
automotive shows taking place this fall including the Tokyo Mobility
Show and Detroit Auto Show.
It will also unveil its next-generation e-CCPM (Electric Complete
Chassis Platform Module) that integrates core electrification innovations
into a versatile aluminum frame, enabling the creation
of diverse purpose-built vehicles) without necessitating distinct
platform developments and offering an all-encompassing solution
for electrification.
Hyundai Mobis began developing the in-wheel system in 2010
in response to the emering electric car market. In-wheel motor
requires a complex design process to place a powertrain
on wheels. It is seen as a technology that needs to overcome
a series of challenges, including securing of drive performance
and durability. The system maximizes drive efficiency without the
need to install a separate power transmission component such
as a drive shaft.
It provides efficient torque distribution for each motor in a wheel,
enabling optimum turns and body control. Hyundai Mobis report10
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