In order to ensure the normal operation of high-voltage motors, in addition to using them according to operating procedures and paying attention to normal monitoring and maintenance during operation, regular inspections should also be carried out to ensure proper motor maintenance and upkeep. This can eliminate some problems in a timely manner, prevent faults from occurring, and ensure the safe and reliable operation of the motor. The time interval for regular maintenance can be determined based on the form of the motor and the operating environment.

The content of regular maintenance for high-voltage motors is as follows.

1. Clean the motor. Timely remove dust and oil sludge from the outside of the motor base. If the environment is dusty, it is best to clean it once a day.

2. Check and clean the motor wiring terminals. Check if the wiring screws of the junction box are loose or burnt.

3. Check the screws of each fixed part, including foundation screws, end cover screws, bearing cover screws, etc. Tighten the loose nuts.

4. Check the transmission device, pulley or coupling for strength, damage, and secure installation; Is the belt and its coupling intact.

5. The starting equipment of the motor should also be cleaned of external dust and dust in a timely manner. The contacts should be wiped, and all wiring parts should be checked for burn marks and whether the grounding wire is in good condition.

6. Inspection and maintenance of bearings. Bearings should be cleaned and replaced with lubricating grease or oil after a period of use. The time for cleaning and oil change should depend on the working condition, working environment, cleanliness level, and lubricant type of the motor. Half of the time should be cleaned and replaced with lubricating grease every 3-6 months of operation. When the oil temperature is high, or when the environmental conditions are poor and there is a lot of dust on the motor, it is necessary to regularly clean and change the oil.

7. Inspection of insulation condition. The insulation ability of insulation materials varies depending on the degree of dryness, so it is very important to check the dryness of motor windings. The humid working environment of the motor and the presence of corrosive gases in the workplace can damage the electrical insulation. The most common type is winding grounding fault, which refers to insulation damage, causing the live part to collide with metal parts such as the casing that should not be live. This type of fault not only affects the normal operation of the motor, but also endangers personal safety. Therefore, during the use of the motor, the insulation resistance should be checked frequently, and attention should also be paid to checking whether the grounding of the motor casing is reliable.

Motors are devices that convert electrical energy into mechanical energy. It utilizes an energized coil (i.e. stator winding) to generate a rotating magnetic field and act on the rotor (such as a squirrel cage closed aluminum frame) to form a magnetoelectric rotational torque. Electric motors are divided into DC motors and AC motors according to the different power sources used. Most of the motors in the power system are AC motors, which can be synchronous or asynchronous motors (the stator magnetic field speed of the motor does not maintain synchronous speed with the rotor rotation speed). An electric motor mainly consists of a stator and a rotor, and the direction of the force acting on the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (magnetic field direction). The working principle of an electric motor is the effect of a magnetic field on the force acting on the current, causing the motor to rotate for maintenance.