Multi-turn position sensors

Absolute multiturn position sensor with high resolution

illustration: Multi-turn position sensors  

Some applications like steering angle requires an absolute position signal over several turns with a high accuracy. For such requirement, MMT has developed through shaft sensor solutions combining two position signals, one called fine signal for high accuracy given by a first sensor directly mounted on the application shaft and a second one called rough signal where the sensor is placed after a motion transformation to determine in which turn we are. The accuracy of the fine signal can even be improved with the use of a magnet with multipolar sinusoidal magnetization.

For Electric Power Steering applications, MMT has also worked on a smart integration of such multiturn position sensor combined with our torque sensor structure in order to propose a very compact design of Torque and Angle Sensor.

MMT proposes to its customer multiturn position sensor with the following features:

  • Multiturn absolute analog position with high accuracy below ±1° on the automotive temperature range -40°C to 150°C
  • Through shaft design
  • Use of existing Hall ICs
  • Smart integration with our torque sensor structure for a compact Torque and Angle Sensor (Electric Power Steering)
  • Patents pending and Licenses available

More information available on demand


MMT also provides magnetic field angle position sensors, high accuracy position sensors, 2D position sensors and sensors with variable reluctance.


Click on the following pictures to enlarge