A1.2 - Surprising advances in magnetic encoder performance - do not expert only better accuracy

AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany
Proceedings Sensor 2017
A1 - Magnetic Sensors
T. Becker, T. Materne - BOGEN Electronic GmbH, Berlin (Germany), S. Cardoso de Freitas - INESC Microsystems & Nanotechnologies, Lisbon (Portugal)
32 - 35


Magnetic encoders have been viewed as low end solutions for many years. German BOGEN Electronic GmbH, reknown for highly accuracte magnetic scales, and the Portuguese INESC institute have teamed up in the European innovation project tuMaPos to improve magnetic encoder accuracy. The first products from the tuMaPos project have now achieved accuracy levels which surpass low end optical encoder performance, while retaining the cost and technical advantages of magnetic measurement. In parallel other new advantages have been achieved, that provide engineers and designers with more possibilities for integrating position measurement in their products.

After a short history of magnetic encoders the presentation focuses on market requirements, new approaches and recent implemented improvements. The different magnetic technologies, such as using Hall effects and different magnetoresistive principles, plus their impact on accuracy will be discussed. At the same time, different approaches for improving scale accuracy are presented. A comparison between optical encoders and magnetic encoder performance underlines, that magnetic encoders have made a giant progress and bring some surprising new capabilities to the market.

The presentation provides users with guidelines how to take advantage of the performance leaps of magnetic encoders and how to achive best accuracy and resolution using magnetic encoders. A short outlook on the future research roadmap highlights areas, where further advances can be expected in the near future.