SNR mechatronic products
Thanks to a 20 year experience in mechatronic products and instrumentation, SNR developed a recognized competence in magnetic sensors for speed and position measurement: writing and reading magnetic data on an annular or linear encoder is the key technology of our solutions.
Example of SNR solution performances : 48pp encoder + MPS40S with resolution x40
- Resolution : 7680 edges/turn = 0.047°
- Max speed : 6250 rpm
- Temperature : -40°C to 125°C
- Automotive qualified solution
SNR magnetic encoders
The use of elastomer based magnetic information supports leaded us to develop a unique savoir-faire in :
- encoder design,
- magnetizing process and testing.
The magnetic encoding is realized in single-track for speed and incremental position measurement, like for the ASB® product‚ or in dual-track for absolute positioning measurement, with SNR proprietary ASIC MPS40S as sensing element.
SNR places at your disposal the encoders developed for automotive applications.
Sensing elements : MPS40S
Hall effect SNR proprietary ASIC called MPS40S is made for simultaneous reading of two magnetic tracks. This sensor generates two quadrature signals and one or more reference pulses. Characteristics :
Interpolation, up to 40 times, of magnetic pattern resolution. Therefore, a multipolar ring with 32 pole pairs can generate up to 1280 pulses/channel/rev (5120 edges).
Integrated temperatue compensation (-40/+125°C),
Automatic compensation of air gap variations between ASIC and encoder during operation.
The MPS40S is programmable and can be adapted to your needs: resolution, magnetic poles lengths, electrical interface, diagnosis, etc.