Method for binding end coil of motor stator

Abstract

The invention discloses a method for binding an end coil of a motor stator, which relates to a motor end coil binding method, in particular to the fixing and binding of the end coil of a high-power alternating current motor. The method involves an outer coil, an inner coil, end hoops and a binding point. A certain number of end hoops are installed between the outer and the inner coils, and the outer coil, the inner coil and the end hoops are bound into a whole body in the position of the binding point. The method enhances the capability of a stator coil end in resisting insulation damage caused by electromagnetic vibration, remarkably improves the heavy load operation capability of the motor and prolongs the service life.

Description

Technical field: [0001] A method for tying coils at the ends of motor stators is a method for tying coils at the ends of motors, and particularly relates to the fixing and binding of coils at the ends of high-power alternating current motors. Background technique: [0002] At present, the coil binding methods at the motor ends all use the two-layer coils to bind the inner and outer layers together, and some add end hoops to the outer layer of the coil to form a "parallelogram" binding structure; when the motor is working, the coil temperature rises accordingly. The insulating material becomes relatively soft. Because the electromagnetic force generated by the alternating current is a physical quantity that changes in size and direction, the amplitude of the electromagnetic vibration generated by it also changes with the increase, resulting in friction between the coil and the coil layer. There is also friction between the internal magnet wires, so that the insulation at the ...

AI Technical Summary

Problems solved by technology

[0002] At present, the binding method of the motor end coil is to bind the inner and outer layers of the double-layer coil separately, and some add end hoops to the outer layer of the coil to form a "parallelogram" binding structure; when the motor is working, the temperature of the coil rises accordingly. The insulating material becomes relatively soft. Since the electromagnetic force generated by alternating current is a physical quantity that changes constantly in size and direction, the amplitude of the electromagnetic oscillation it produces also increases and changes, resulting in friction between the coil and the coil layer. There is also friction between the internal electromagnetic wires, so that the insulation at the end of the coil is damaged first, causing a short circuit and damaging the motor winding; the vibration of the electromagnetic wire causes damage to the motor and directly affects safe production

Images