Manufacturer of Angle, Position, Speed, Tilt and Current Sensors
A layer of extreme high-speed capability and magnetic resilience
Our rotor position sensors provide the versatility required for high-speed traction motors, e-compressors, and flexible layouts, while simultaneously delivering the efficiency and cost-effectiveness necessary for high-volume e-axle and hybrid drive production.
| Features
Up to 600.000 (el) rpm speed Robust to tilt, misalignment and air gap variations ESD and short-circuit protection High resolution, even for small angle ranges Rotation sensing up to a full turn of 360º 🍃 Rare-earth-free |
Integration
options End of shaft on-axis Through/hollow-shaft Arc / segment Linear displacement Off-the-shelf position and speed sensors for automotive transmissions Wiring / connectors assemblies |
Accurate feedback on the angular position, direction, and speed of the rotor shaft is essential to optimize control of the motor inverter and drive electric motors with the best possible efficiency. With lower weight, smaller dimensions, immunity to stray fields and comparably lower cost, Piher Sensing System’s eMotor Rotor Position Sensors without magnets, offer a true alternative to conventional encoders, magneto-resistance, single/multi coil, and VR resolvers. Furthermore, inductive eMotor rotary position sensors can be designed to be ASIL-D compliant on sensor level.
Inductive sensors use the physical principle of induction in a wire loop and eddy currents to detect the position of a solid metallic target rotating above a set of coils. This allows a reduction in parts and higher design flexibility (e.g. through-shaft, end-of-shaft and arc configurations).
Temperature-Compensated and Redundant Performance
These sensors feature integrated temperature compensation to ensure stable and precise operation across the entire operating range, maintaining accuracy even under extreme thermal conditions. In addition, various configurations with redundant signal outputs are available, providing enhanced functional safety and reliability for demanding automotive and industrial applications.
Because inductive technology does not rely on magnets, there is no need for the installation clearances typically required by magnetic sensing solutions to avoid stray magnetic fields or nearby ferromagnetic materials, simplifying integration in compact e-motor assemblies.
Development according to functional safety ASIL-D on sensor level possible.
No shielding required as inductive technology is not affected by electromagnetic stray fields.
A direct, demodulated analog output means no additional electronics are needed to calculate rotor position.
Reduced size and weight compared to resolvers.
Advanced Non-Contact Motor Rotor Position Sensing
