ARC Motor Rotor Position Sensor

Motor position sensors for accurate xEV motor commutation

Accurate feedback on the rotor shaft’s angular position, direction, and speed is essential for optimizing motor inverter control and maximizing motor efficiency. Precise rotor position information also enables accurate motor commutation, supporting smooth torque delivery and dynamic motor control across the full operating speed range.

With lower weight, smaller dimensions, immunity to stray fields, rare-earth-free and comparably lower cost, Inductive high-speed eRPS eMotor Rotor Position Sensors offer a compelling alternative to encoders and resolvers.

The ability to customize the sensor to specific motor dimensions provides greater flexibility in the development of next-generation electric and hybrid powertrains. Its advanced non-contact sensing principle ensures that the output is always precise, while the rugged construction is ready for the toughest environments.

Specifications

Up to 600 000 (electrical) rpm speed
Low weight and compact dimensions
Robust to tilt, misalignment and air gap variations
True power-on sensor: excellent accuracy and precision
Immune to stray fields, no shielding required
ASIL-D ready
Suitable for harsh environments (fully sealed, shock, vibration)
ESD and short-circuit protection

Integration options

On-shaft
Through-shaft
Arc/Segmented off-axis

KEY FEATURES

Rare-earth-free

Removing magnets reduces exposure to rare-earth supply risk, avoids magnetic particle build-up, and improves immunity to stray fields and EMI.

ASIL-D ready

Development according to functional safety ASIL-D on sensor level possible.

Immune to magnetic stray fields

No shielding required, as inductive technology does not rely on magnets and is not affected by electromagnetic stray fields. Unlike magnetic-based solutions, performance is not dependent on keeping the sensor away from stray magnetic fields or nearby ferromagnetic materials.

No additional electronics needed

A direct, demodulated analog differential output means no additional electronics are needed to calculate rotor position.

Made for harsh environments

The rugged package protects the sensor from dust, moisture, vibration and extreme temperatures for usage in the most demanding environments.

Low weight and compact dimensions

Reduced size and weight compared to resolvers.

True Power-on Sensor

Delivers accurate motor position directly on start-up.

SPECIFICATIONS

Signal output	Analog: differential sine/cosine (1.0V to 4.0V) Digital: ABI, SPI, SENT, AB, PWM
Accuracy	±0.3° el
Resolution	Analog: infinite Digital: up to 14 bit
Propagation delay	<4.2 μsec
Power consumption	< 20 mA
Maximum speed	600.000 rpm (electrical)
Pole pairs	Up to 32