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Working State Of Gear-Type Magnetic Induction Encoder

Location sensor In addition to the photoelectric type, there is a relatively common, that is the magnetic induction position sensor, then the inductive position sensor working principle is what? The following China sensor trading network experts to give you a description of the magnetic inductive position sensor working principle.Gear-Type Magnetic Induction Encoder

The path through which the magnetic field lines traverse is a permanent magnet n-pole and a gap between the rotors one rotor convex teeth and the air gap between the stator heads a magnetic plate a permanent magnet s pole. When the signal rotor rotates, the air-gap in the magnetic circuit changes periodically, the magnetic resistance of the magnetic circuit and the flux through the head of the signal coil change periodically. According to the principle of electromagnetic induction, the sensing coil will induce alternating electromotive force.Gear-Type Magnetic Induction Encoder

When the signal rotor rotates in a clockwise direction, the gap between the rotor cam and the head is reduced, the magnetic resistance decreases, the flux increases, the flux change rate increases, the induction electromotive force is positive, and when the rotor cam is close to the head edge, the magnetic flux increases sharply, the flux change rate is the biggest, the induction electromotive force is the highest. After the rotor has been transferred to the B-point position, although the magnetic flux is still increasing, the flux change rate decreases, so the induction electromotive force decreases. When the rotor rotates to the center line of the tooth and the center of the Head is aligned, although the gap between the rotor and the head is the smallest, the magnetic resistance is the smallest, the magnetic flux is the largest, but because the magnetic flux cannot continue to increase, the flux change rate is zero, so the induction electromotive force is zero.Gear-Type Magnetic Induction Encoder Because the air gap between the rotor cam and the magnetic head directly affects the magnetic resistance and the output voltage of the sensing coil, it is not possible to change the air gap between the rotor's convex teeth and the magnetic head in use. The above is the inductive position sensor working principle of a simple introduction, the change is more complex, we should really grasp the type of position sensor operation, must master these changes rules. In addition to the photoelectric position sensor, there is a class of more common, that is the inductive position sensor.Gear-Type Magnetic Induction Encoder