Polyimide film applied to motor insulation film can withstand compressive creep at high temperature

Glued polyimide film is an excellent insulating material for automatic winding operations. Can be used for magnet insulation systems (motor or transformer coils, etc.), motor slot gaskets, phase insulation of aircraft motors and generators, capacitor electrolytes, wire and cable sheathing. In advanced proton accelerators, polyimide films are used as heat-resistant insulation and radiation-resistant materials.

The insulating film is not only used as an insulating part in electrical appliances because of its excellent properties, but also can be used in a relatively humid environment due to its other functions, such as good dielectric properties and moisture resistance, in a wider range of occupations , making it widely used in motors, PCB test tools, tablet computers and some leather goods.

In addition to the excellent thermal, electrical and mechanical properties of polyimide films, films applied to motor insulation can also withstand compressive creep at high temperatures. It is suitable for single-layer or H-class small and medium-sized motor slot insulation combined with aramid fiber paper. It can also be used as ground insulation and other auxiliary insulation for mining motors and locomotive traction motors.

Although the coils and other components of the motor have a certain insulating ability when they are made into the stator and rotor, for example, the enameled wire is insulated with a varnish film; there is slot insulation in the iron core slot.

However, a thin layer of paint film on the enameled wire is very fragile and fragile as conductor insulation, and the enameled wire, slot insulation and slot wedge move with each other. When the motor starts, runs, and stops, the polyimide film insulation material should withstand the impact of electromagnetic vibration and mechanical vibration, as well as moisture, dust, salt mist in the air and corrosive gases or droplets in the working environment. Erosion, withstanding ageing from heating conditions during operation.

In order to make the motor work normally under this condition, the coil and its adjacent parts must be impregnated with insulating varnish, so that the insulating parts such as conductors and slot insulation are encapsulated into a dense and solid whole with insulating resin.