In automotive motor control
systems, safety is critical
across all components—as any
malfunction could directly
endanger the driver, especially
during crucial operations like
acceleration, braking,
and overtaking."
This electric motor is controlled by an MCU that
adjusts the level of assistance on the basis of vehicle
speed, steering angle, and other parameters. At low
speeds, the MCU increases assistance, making it
easier for the driver to turn the wheel—a particularly
useful feature in parking scenarios. Assistance is
reduced at higher speeds to provide a better road
feel and stability.
Motor control can also impact user experience in
terms of noise reduction. Inherently, EVs produce
less noise than their internal combustion engine
counterparts, but noise sources still need to be
managed for an optimal user experience. These
sources include the electric motor itself, inverter
switching, mechanical components like gears, and
road-tire interactions.
For example, torque ripple is a common source of
noise and vibration that arises from variations in
the torque produced by the motor. Based on field-
oriented control (FOC), sophisticated motor
control algorithms are designed
to minimize torque ripples
by delivering smooth and
C h a p t e r 2 | M o t o r C o n t r o l i n B o d y E l e c t r o n i c s a n d Ve h i c l e D y n a m i c s
Vincent Lagardelle
Automotive Electrification Systems Marketing Manager,
NXP Semiconductors
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11 Experts Discuss Advanced Motor Control for Modern Electric Vehicles 11 Experts Discuss A
