Magnetic field angle measurement

MMT has developed a complete family of magnetic circuit to generate a complete 360° rotation of the magnetic field as a linear function of a permanent magnet position. In association with the most recent field angle measurement chip based on Hall effect or GMR, these magnetic structures ensure the following performances:

• Simple and low cost structure
• Non linearity below+/-0.25% of the stroke on the automotive -40°C to 150°C temperature range
• Almost no sensitivity to production and application tolerances
• No sensitivity to temperature variation
• No magnetic hysteresis
• Rotary through shaft and linear designs
• Specific proprietary magnetization to generate the 360° rotation of the magnetic field on a flat of a tile magnet
• Rotary stroke from 2° to 360° (multi-turn design also available)
• Linear stroke from 10 mm
• Compatible with very large through shaft applications like position control of electric motors for electric or hybrid drives (50...150 mm shaft diameter)
• Custom features available on request

You can download here an application note released with Melexis and related to such rotary position sensors.

More information available on demand
 

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