How do ac motor maintenance and maintenance?

Answer:

The motor should always be kept clean and not allowed to enter into the motor. The inlet and outlet must remain open. Use instrumentation to monitor the voltage, frequency and load current of the motor. Power supply voltage, frequency, to comply with the motor nameplate data, motor load current shall not exceed the specified value, the plate of or to find out the reason, take measures to bad situation to eliminate the rear can continue to run. Take the necessary means to detect the temperature rise in each part of the motor. The contact pressure, wear and spark of the electric brush and the collector ring are often noted for the wound rotor motor. When the motor is suspended, the switch in the stator circuit should be disconnecting, then the brush lifting mechanism should be switched to the starting position and the short circuit device. The electric motor is repaired regularly after operation, usually in minor repair and major repair. Minor repair is a general maintenance, not big to the motor start device and a whole disassembly, about one in the first quarter, overhaul to all parts of all transmission device and motor is removed, and will remove the components of a comprehensive inspection and cleaning, usually once a year

electrical 1, the winding resistance equilibrium, 2, alternate insulation, 3, the winding is insulated from the earth, 4, is the terminal block loose or not, Whether the running current is normal, 5, what is the temperature rise at run time? Mechanical aspects 1, bearing noise, 2, the bearing temperature rise, The dust of the motor case should be cleaned regularly.

After all inspection is required, the motor can be started. Motor starts, no-load running for 30 minutes, observe whether there are abnormal phenomena, such as noise, vibration, fever found abnormal situation, should take measures to stay is eliminated, can be put into operation. When starting a linear motor, the starting rheostat should be connected to the rotor circuit. For the motor that has the brush lift mechanism, should put down the brush, and disconnect the short circuit device, close the stator circuit switch, the trigger rheostat. When the motor is close to the rated speed, the electric brush is lifted, the short circuit device is closed, and the motor is finished.

Check for the reliability and integrity of electrical and start-up equipment, and the connection is correct and good. Check the voltage, frequency and frequency of the motor nameplate. Prior to the start of the new installation or suspension of the electric motor, the relative phase of the winding and relative insulation resistance should be checked before starting. The insulation should be more than 0.5 trillion euro, and if it is below this, the winding should be dried. 4, should inspect the brush device on the ring of the circuit to be able to work normally, the brush pressure is in accordance with the requirement. Check whether the motor is flexible and whether the oil in the sliding bearing meets the required oil level. Check whether the rated current of the fuse is required. Check the bolts and bolts of the motor to be tightened.

Maintenance and maintenance of electric motors: A, 1, in the daily inspection, mainly check the lubrication system, appearance, temperature, noise, vibration and abnormal phenomenon, also check the ventilation cooling system, the condition of sliding friction and fastening situation of parts, do check and record. 2, monthly or regular inspection of the main check grounding device switch, wiring, whether there is loose phenomenon, such as presence of damaged parts, if you have to plan and repair measures are put forward, check the dust accumulation, to timely cleaning, check for damage and aging lead wire and the wiring problem. Test the insulation resistance of the motor winding and record it. In addition to the above mentioned items, the annual inspection of the disintegrating motor will be checked, cleaned or cleaned, and checked for insulation