China quality Electrical Insulation Materials On Motors Manufacturer

In China,if you want to find a manufacturer or supplier of electrical insulation materials on motors,Suzhou Hanyao will be the right Choice. We offer Polyimide Film For Motor Coil Winding, Polyimide Silicone Adhesive Tape, Polyester Heat Shrinking Tape, etc. The insulation materials used in electric motors constitute a complex and highly specialized system. Their core task is to ensure reliable insulation between conductive parts of the windings and to ground under harsh electrical, thermal, mechanical, and chemical stresses, while simultaneously guaranteeing the long-term service life of the motor.

Product performance and structural characteristics

The requirements for electrical insulation materials on motors are no less stringent than those in transformers,on the contrary, they are even higher.Because the motor rotates continuously, generating strong centrifugal force, the insulation material not only needs to withstand the high temperatures generated during motor operation but also the various stresses produced by high-speed rotation.

Therefore, in addition to high-temperature resistance, it also needs strong mechanical properties to ensure the robustness and integrity of the main body.Motor insulation rarely uses a single material. Instead, it employs a multi-layered structure, utilizing the synergistic effect between materials to achieve redundant design, ensuring that a failure in one area will not immediately lead to overall breakdown.

The most common materials are like aramid paper laminated with polyester film AMA(also called NMN),aramid paper laminated with polyimide film AHA(also called NHN).Common heat resistance grades for electric motors include B (130℃), F (155℃), H (180℃), and C (>180℃). Modern electric motors generally use F-class or H-class insulation systems.

What are the differences in the performance focus of motor insulation materials and transformer insulation materials?

Electrical insulation materials on motors need to withstand various stresses.Examples include electrical stress, which includes power frequency voltage, high-frequency pulse voltage (dv/dt) generated by frequency converters, and partial discharge (corona). Mica is the only effective natural material to resist corona.Thermal stress,the system operates under prolonged temperature rise and frequent start-stop cycles, requiring materials that are resistant to thermal aging.Mechanical stress:,vibration caused by electromagnetic force, starting torque, and centrifugal force from high-speed rotation.Environmental stress:,humidity, oil stains, chemical gases, dust.