EMI7913 Incremental Sensor Module for Linear Motors

“Easy Encoder” system for linear motors
Fully integrated AMR-based length measuring system


Increasingly higher demands on dynamics, synchronism and cost efficiency have also made new approaches to solutions necessary in linear drive technology. The special feature of the new EMI7913 sensor module from Sensitec is the "Multi-FixPitch Concept", in which four AMR sensors are combined with an interpolation ASIC and the sensors are aligned on the module with the motor magnets (e.g. linear motor). This turns the motor magnets into a magnetic scale - i. e. no additional scale component is required. There is no need for an additional scale to be integrated into the drive system which saves the designer work and costs. The system also scores with its high installation tolerance, which in turn saves time during final assembly. The encoder is installed on the slide of the linear motor above the stator magnets, which in practice proves to be a particularly easily accessible installation location. The arrangement of the sensors ensures a good and stable signal quality. The product variants can be easily adapted to the respective customer magnets. The AMR sensors used in the Multi-FixPitch configuration provide a very cost-effective solution for the measuring task. The new sensor module should therefore be particularly interesting for applications in handling systems with medium accuracy requirements. Incremental encoder concept for direct measurement on the
stator magnet in various industrial applications for example:
- Linear motors
- Tubular motors
- Versatile industrial transport systems