Product name: Electromagnetic induction vehicle speed sensor and magnet
Application: For a car equipped with an automatic belt changer, the input shaft speed sensor of the automatic transmission generally adopts an electromagnetic induction speed sensor. Its structure is the same as that of the electromagnetic induction speed sensor, and its working principle is also the same as the speed sensor. The vehicle speed sensor consists of a permanent magnet and an electromagnetic induction coil. The higher the vehicle speed, the higher the output shaft speed and the higher the frequency of the induced voltage pulse. The electronic control unit ECU calculates the speed of the vehicle according to the size of the induced voltage pulse as the basis for shift control.
Structure: Composed of permanent magnets, shafts, coils, etc.
Permanent magnet material: Bonded NdFeB magnet
Magnetization method: single-sided multi-pole magnetization/16-pole magnetization
Surface treatment: black/electrophoresis
Place of Origin: Shenzhen City, Guangdong Province, China
Hazardous substance control: ROHS2.0, REACH
mold: to
Molding method: powder compression molding
Magnet specification: D20mm
Surface magnetic field strength ≥ 1850Gauss
Magnet weight: 2.37-2.53gram
Usually the magnets used in the vehicle speed sensor are permanent magnets, some use injection molded magnets, and some use molded bonded magnets. Generally, an even number of pairs of poles is used for magnetization, for example, 4 or 8 pairs of poles (8 poles or 16 poles). Different car companies have different design specifications. Some use radial external charging, and some car companies use planar multi-pole magnetization. , in this respect we have accumulated a lot of experience with magnets for automotive sensors. Including electronic shifter magnets, transmission main magnets, steering wheel position sensor lock permanent magnets, grille open actuator magnets, seat position sensor magnets, damper actuator motor magnets, liquid leak detector magnets.
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