TDK exhibited angle sensors for the control of hybrid and electric vehicle motors. This product uses GMR components. Compared with current mainstream angle sensors using coils and magnets, they are characterized by a sensor accuracy of up to 0.35 degrees and a small size.
The angle sensor is used with a metal disc mounted on the motor shaft. The sensor adopts an arc shape and has 4 built-in GMR elements. The rear side of each GMR element is equipped with a permanent magnet. The metal disc is slightly elliptical. When the motor shaft rotates, the magnetic field changes as the distance between the disc and the sensor changes. The angle can be grasped by detecting the change of the magnetic field through the GMR element.
According to the company, for hybrid vehicles and electric vehicles, smooth operation at the time of starting, there is a demand to detect the motor angle at rest with a measurement accuracy of 0.5 to 0.8 degrees. In the future, this sensor will be sold to hybrid cars and electric cars for premium models. Sample shipments have begun.
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Material grade: stainless steel 304, stainless steel 316
steel DC01,DC04,ST12,Q235,SJ235R
galvanized steel sheet DX51D
Stock thickness ranges from 0.30mm-6.0mm for stainless steel
0.30mm-3.0mm for copper
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0.20mm-6.0mm for carbon steel
Surface finishing: polishing, satin blasted,powder coating, electro plating,anodize
Application: motor housing, metal cover, caps etc.
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