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Maintenance and precautions of motor commutator

更新:09-07-2020
摘要:

Today, with the rapid development of technology, we nee […]

Today, with the rapid development of technology, we need to use more and more things, there are many electrical appliances, such as stepper motors, stepper motors, air conditioning motors, etc. In so many new products, the motor is mentioned, so what should be paid attention to when designing the motor? Motor steering gear, how should we maintain the maintenance of the motor commutator

Ventilation fan motor

In the process of using the motor commutator, we must keep its surface smooth and free from damage and burn marks. If these problems occur, we should take measures to deal with them, such as serious burn marks or roughness on the surface of the commutator of the DC motor, local unevenness, etc., we should remove and re-turn turning. After turning, the mica piece in the mica slot between the pieces should be engraved about lmm, and the metal debris and burrs on the surface of the DC motor commutator should be removed, and finally the entire armature surface should be cleaned with compressed air before assembly. . After long-term operation of the DC motor commutator under load, a hard dark brown film will be produced on the surface. This film can protect the surface of the DC motor commutator from wear, so this film should be protected.

Matters needing attention in motor design
1.The stepper motor has a large air gap, large reluctance, and a large number of excitation ampere turns, which reduces the motor excitation current and motor power factor, but the air gap ambassador harmonic magnetic field is weakened, the additional loss of the motor is reduced, and the air gap is too small, which can easily cause a fixed rotor Broom sweep, and motor efficiency is reduced due to increased additional losses.
2. Step motor rotor skew can weaken the phase of the harmonic potential of the rotor bar along the axial direction, thereby reducing the additional synchronous torque and additional asynchronous torque, reducing the additional loss of the motor, improving efficiency, and reducing noise. vibration.

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