The winding is the key component of the motor and the weakest link, which is easy to be damaged. It is influenced by inductance, heat, mechanical vibration and environmental factors. Winding is the main factor that determines the life and operation reliability of motor. The winding cost is the main component of the total cost of the motor, and the materials used in the winding are greatly influenced by market economy factors.
Therefore, it is of special significance to improve the life of windings. The winding manufacturing process includes coil manufacturing, winding embedding and insulation treatment. There are many manual operations, and the labor intensity is high, and the quality is difficult to stabilize. Therefore, it is an important task for motor manufacturers to master the manufacturing technology of motor windings correctly and improve the quality and service life of windings.
The main function of the motor is to strengthen the mechanical strength and electrical insulation strength of the winding end. The end of the motor winding is the weakest part of the motor winding. With the strengthening of the mechanical strength of the winding end, the winding end can resist the destructive force caused by motor vibration, electromagnetic force and ventilation, while with the strengthening of the electrical insulation strength, the winding end can resist corona corrosion.
The motor is overloaded for a long time, which makes the insulation aging lose its insulation function; Insulation damage caused by wire embedding; The winding is damp, which reduces the insulation resistance and leads to insulation breakdown; During the molding process, the insulating materials at the ends and between layers are not filled or damaged correctly; The insulation of the end connection wire is damaged; Insulation breakdown caused by overvoltage or lightning strike; Friction between rotor and stator winding ends will cause insulation damage.