Why does the rotor not rotate when a magnet is placed?

In the assembly or repair process of the motor, sometimes encounter a common but confusing phenomenon, that is, the motor rotor can not turn after putting in the magnet, what is the cause of this? Today to give you a few common situations.

Inappropriate gap between the magnet and the rotor

If the gap is too large, the magnetic force cannot effectively act on the rotor, which may lead to insufficient adsorption and unstable operation of the rotor. If the gap is too small, it may lead to mechanical interference and the rotor may be stuck or friction may occur.

Solution: Check whether the gap between the magnet and the rotor is appropriate, if the gap is not appropriate, you need to readjust to ensure that the gap size is appropriate.

Powerful arc-shaped magnets commonly used in motors

Insufficient magnetic force

It could be both the quality of the motor rotor and the fact that the magnets are not strong enough.

Solution: If the magnets are not strong enough, try replacing them or replacing them with stronger magnets.

Magnetic pole direction is incorrect

If the magnetic pole direction is different from the rotor magnetic pole direction, a magnetic field that cancels each other out will be generated, causing the motor to lose rotational force.

Solution: If the magnetic pole direction is incorrect, it is necessary to adjust or replace the magnet to ensure that the magnetic pole direction is consistent with the rotor magnetic pole direction.

Motor coil open circuit

One or more of the motor coils are disconnected, preventing the formation of a complete magnetic field circuit and causing the motor to fail to rotate.

Solution: Check if the motor coil has a broken circuit, you can use a tester to test the motor coil, if there is a broken circuit you need to repair or replace the coil.

The above methods can help solve the problem of the motor rotor put into the magnet does not turn, but also according to the specific failure to analyze and deal with specific.

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