Permanent magnet motor frequently appeared several problems and maintenance methods

Permanent magnet motors are useful in many places, but they often present some faults that make them unable to operate. So we usually accumulate a little more lessons, may encounter problems when the faster to solve the problem.

Xiaobian at the beginning of the usual number of problems we often encounter a summary, and attached to the solution. Explosion-proof motor A type of motor that can be used in inflammable and explosive places and does not produce sparks during operation. Explosion-proof motor is mainly used in coal mine, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors. Explosion-proof motor is mainly used in coal mine, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors. As the main power equipment, explosion-proof motor is usually used to drive pumps, fans, compressors and other transmission machinery.

The problems that permanent magnet motor usually presents easily are:

1. After the permanent magnet synchronous motor is energized, the electric motor can not rotate, but it is no different, and there is no odor and smoke.

2, the electric motor does not turn after electricity, and then the fuse is burned off

3, electricity after the electric idea does not turn a buzz

4, the electric motor starting hard, rated load, the electric motor speed is lower than the rated speed

5, the motor no-load current is not balanced, the three-phase difference is large

6, electric motor no-load, over load, ammeter pointer is unstable, swing 7, electric motor no-load current balance, but the value is large

The above is the permanent magnet motor maintenance usually presented seven problems. Permanent magnet motor is mainly used in coal mine, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors. As the main power equipment, explosion-proof motor is usually used to drive pumps, fans, compressors and other transmission machinery.

1. The power supply is not through, the fuse is broken, the overcurrent relay is too small, the wiring is wrong, etc

2, lack of a power supply, stator winding short circuit, grounding, fuse section is small, short circuit power supply, etc

3. The winding is disconnected, the power supply voltage is too low, the bearing is stuck, etc

4, the voltage is too low, cage rotor welding or fracture, motor overload, repair motor winding increase the number of turns too much

5. The number of turns of the stator three-phase winding is not equal, the end of the winding is misconnected, the group has inter-turn short circuit, coil reverse connection and other faults

6, cage rotor guide bar welding or broken bar, wound rotor failure

7, the power supply voltage is too high, gap is too large or uneven