Development of magnetic absolute encoders based on a globally patented magnetization pattern
Absolute Magnetics AG
Winterthur (CH)New on Amplifa
About Absolute Magnetics
Absolute Magnetics is a Swiss technology company based in Winterthur that develops magnetic rotary encoders (absolute encoders) for rotary position detection. The core products are customer-specific encoder solutions, the AM Integrate Series, and an Evaluation Kit for testing and accuracy measurements. The technology is based on a globally patented, multi-periodic magnetization pattern in which the magnet and electronics determine the absolute position as a two-component system without calibration. Thanks to a single measurement track instead of the usual two tracks based on the nonius principle, the encoders are insensitive to magnetic stray fields up to 40 mT, air gap fluctuations, eccentricity, and mounting inaccuracies. The systems achieve accuracies of up to ±0,075°, repeatability of up to 0.035°, rotational speeds of up to 30'000 rpm, and operating temperatures from −40 °C to +125 °C. Absolute Magnetics integrates the encoders directly into motors and drive applications for industries such as automation, robotics, automotive, metrology, energy technology, logistics, medical technology, and aerospace.
- Site
- Winterthur
- Processes
- Tailor-made magnetic absolute encoder solution (development), AM Integrate Series – magnetic absolute encoder (accuracy ±0.3°, resolution 8-14 bit, air gap, AM Integrate Series (extended specification: output SPI/ABI/SSI/PWM/UVW/SinCos, resolution 8-16, AM Evaluation Kit – testing and accuracy measurements of the encoder technology, Tailor-made encoder development, Integrated encoder solutions, AM Evaluation Kit (testing and evaluation offerings), Factory calibration (optional)
- Materials
- Multi-periodic magnet, Encoder electronics (Hall sensor technology), Press-fit magnet assembly
- Certificates
- Patented core technology, Factory calibration (optional), Stray field resistance up to 40 mT, ISO 9001
- Industries
- Industrial Automation, Robotics, Automotive, Metrology, Energy Generation, Logistics
- 01
Requirement analysis
- 02
Tailor-made encoder development
- 03
Optional: factory calibration
- 04
Testing with AM Evaluation Kit
- 05
Integration into customer application
Technology & Operating Principle
Multi-periodic magnet
Magnet with a patented, superimposed magnetization pattern on a single measurement track as the measurement source.
Encoder electronics (Hall sensor technology)
Analog Hall sensors and evaluation electronics with outputs such as SPI, ABI, SSI, PWM, UVW, and SinCos.
Press-fit magnet assembly
Magnet with a metallic sleeve and overmolding, mounted directly onto the motor shaft by press fit.
Location
Winterthur
CHHead office and development
- Part weight / size
- Shaft diameter 4–95 mm
- Lot size
- Development, prototype to series production
- Materials
- Magnet, electronics
- Evaluation electronics with analog Hall sensors
- Test setup with reference encoder
- AM Evaluation Kit
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Tailor-made magnetic absolute encoder solution (development)Engineering | – | – | – | – | Magnet, Electronics |
| AM Integrate Series – magnetic absolute encoder (accuracy ±0.3°, resolution 8-14 bit, air gapTesting | ±0.3° | – | – | – | Magnet, Electronics |
| AM Integrate Series (extended specification: output SPI/ABI/SSI/PWM/UVW/SinCos, resolution 8-16Testing | ±0.075° | – | – | – | Magnet, Electronics |
| AM Evaluation Kit – testing and accuracy measurements of the encoder technologyTesting | – | – | – | – | – |
Additional services
Quality & Performance
Without calibration, the accuracy is below 0.5°, and with optional factory calibration below 0.1°. Performance tests for stray field resistance (up to 40 mT), eccentricity, air gap variation, and ramp-up (0 to 7'000 rpm) are carried out in a test setup with a reference encoder.
| Evidence | Winterthur |
|---|---|
| Patented core technology | |
| Factory calibration (optional) | |
| Stray field resistance up to 40 mT | |
| ISO 9001 |