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PPS Resin Isotropy NdFeB Sensor Magnet for TMR Angle Sensors, Round Magnets for Board Mount Hall Effect / Magnetic Sensors, Disc Magnetic Sensor Magnets, TMR sensor Resin PPS Magnetic Encoders supplier
PPS Resin Isotropy NdFeB Sensor Magnet for TMR Angle Sensors Magnetic characteristics
Magnetic powder Isotropy NdFeB
Residual magnetic flux
density Br mT 525
Retention force Hcb kA/m 358
Retention force Hcj kA/m 891
Maximum energy product
BH max kJ/m3 47
The product is recommended when the ambient temperature is expected to be 150℃ or above.
The optimal magnet for TMR angle sensors
Magnetic field distributions that reduce angular errors can be made by combining it with our TMR angle sensors due to the adoption of an isotropic bonded NdFeB magnet.
Magnetization to minimize the error of angle
High robustness against the setting area between
magnet and TMR angle sensor
For EPS angle sensor
For control system of wiper motor
For other automotive angle sensor
The distance between magnets and TMR angle sensors, and the relationship between the magnetic flux density and radius that can attain an angular error of 0.1 degrees or below
Positional relationship between magnets and sensors
TMR (Tunnel MagnetoResistance) elements were introduced as a new type of magnetoresistance sensor for industrial applications. They are constructed as a magnetic multilayer film material. TMR magnetic field sensing elements exhibit a greater change in resistivity, as a function of applied magnetic field induction, than that of the previously developed magnetoresistance technologies, AMR and GMR. The term Magnetic Tunnel Junction (MTJ) is used to refer to a TMR sensing element. TMR Angle Sensor Magnets Round Isotropy NdFeB PA12
The anisotropic magnetoresistance effect in metals describes how the resistance of the material is related to the orientation between the current and the magnetic field—reaching a minimum when the current and magnetic field are at right angles to one another.
The giant magnetoresistance effect is a large change in resistance between two ferromagnetic layers that are separated by a non-magnetic conductor. The resistance decreases when the magnetic field in the two layers is parallel and increases when the magnetic fields are anti-parallel.
The trouble with these two approaches is that the changes in resistance are relatively small and require a Wheatstone bridge and a signal amplifier for detection. Thermal noise in the sensor and Wheatstone bridge is amplified and decreases the overall sensitivity of the device. Temperature changes also have a significant effect on the sensor over its operating range.