Causes and solutions for reduced motor insulation performance

Reasons for reduced insulation performance

• Environmental factors: Temperature and humidity are important environmental factors that affect the insulation performance of motors. High temperatures accelerate the aging of insulation materials and reduce their insulation strength, while high humidity may cause the insulation materials to become damp, thereby reducing insulation performance.

• Material aging: As the use time increases, the insulation material will gradually age and its insulation performance will decrease. This includes cracking, delamination or shedding of the insulation layer.

• Mechanical damage: The motor may be subjected to mechanical shock or vibration during operation, which may cause damage to the insulation layer, such as cracks or breaks.

• Electrical problems: Electrical problems such as overvoltage or arc discharge can also cause the insulation material to lose its protective effect, thereby reducing the insulation performance.

The solutions are as follows

• Optimize design and manufacturing process: select more suitable insulation materials and adopt advanced manufacturing technology to improve the insulation quality of windings. For example, the use of high-performance impregnation varnish can form a continuous and dense insulation structure to reduce partial discharge damage.

• Regular maintenance and inspection: Regularly inspect and maintain the motor to detect and repair the damage of the insulation layer in time, which can effectively extend the service life of the motor and maintain its good insulation performance.

• Use advanced insulation materials: Use advanced insulation materials with higher heat resistance, mechanical toughness and electrical insulation, such as dielectric functional gradient materials (d-FGM), which can significantly improve the electrical strength of the insulation structure.

• Improve operating conditions: Control the operating environment of the motor, such as temperature and humidity, and avoid long-term operation in extreme environments to reduce the aging rate of the insulation material.

Through the above measures, the insulation performance of the motor can be effectively improved, its service life can be extended, and the stable and safe operation of the motor can be ensured.