What are the factors that affect the life of the motor?

Update:06-08-2019
Summary:

The life of the motor is generally 7 to 15 years, and m […]

The life of the motor is generally 7 to 15 years, and may even reach 20 years. The life of the motor depends largely on the user's maintenance, the quality of the environment, and the electricity, magnetism, and heat that the motor receives during use. Vibration and other factors. The specific motor should be analyzed specifically.

 

For example, like a general-purpose brushed low-power micro-motor, its life depends mainly on the length of the commutator, bearing, and brush. After the end of their life, they cannot be replaced.

 

For DC motors, permanent magnet DC motors and other small and medium power motors (except for high power, not to mention), their lifespan depends on the insulation life of the commutator and winding, bearing damage and brush polishing can be replaced, even After the permanent magnet material is demagnetized, it can be re-magnetized, which extends the life of the motor and is much cheaper than buying a new motor.

 

For single-phase or multi-phase asynchronous, the life of synchronous motor mainly depends on the electric, magnetic, thermal, vibration, environmental conditions, and the user's care and maintenance of the motor in use. Their damage, that is, the end life is the motor. The life of the winding. Usually, such as good maintenance, reasonable choice of motor capacity, and the form of installation, will make the life of the motor reach the designed service life, even far exceed the design life.

 

There are several reasons for summing up:

1. The temperature of the motor itself is designed to rise. If the temperature of the motor design rises too high, and if the ambient temperature exceeds the insulation limit temperature, the life of the motor will be greatly reduced.

 

2, Bearing: bearing quality is poor, short life, it will lead to short motor life. Mainly due to mechanical failure after the impact of the motor life.

 

3. Insulation material. The quality of the insulation material is poor and the motor temperature limit is reduced.

 

4. External voltage.

 

5. Environmental conditions and working conditions.