Description of insulation material and heat-resistant material grade of stepping motor.
Description of insulation material and heat-resistant material grade of stepping motor.

The requirements of stepping motor for environmental humidity are mainly to prevent condensation inside the motor. The ferrite cores on the outer surface of the rotor of the stepping motor and the inner surface of the stator of the motor generally have no other anti rust measures except to apply anti rust agent during production and processing. If the environmental humidity is too high, it is very easy to condense water on the surface, thus causing corrosion. Because the gap between the motor rotor and the motor stator of the stepping motor is not large, the rust may jam the motor rotor and make the motor invalid. In addition, on the one hand, too high environmental humidity will also harm the insulation characteristics of insulating raw materials. Generally, the harm to Small-size stepping motors with low motor in general work is not great, but for stepping motors with high driver working voltage, this kind of harm can not be ignored.

The insulation raw material of stepping motor is indicated by the high temperature resistant raw material level.
UL divides the verification level of insulation system software into YAEBFH level according to the high temperature resistance temperature from low to high.
The following is an overview of the insulation raw materials with the maximum allowable operating temperature (℃) of the high temperature resistance level equal to the high temperature resistance level.

Class Y temperature resistance 90 °, insulation structure composed of raw materials such as pure cotton yarn, silk and paper or their components that have not been impregnated. Therefore, grade y can be used as raw materials without any solution.

Class A temperature resistance: 105 °, insulation structure composed of pure cotton yarn, silk, paper and other raw materials or their components impregnated or immersed in liquid electrolytic medium (such as insulating oil).

Class E temperature resistance 120 °, insulation structure composed of organic chemical plastic film, organic chemical enamel and other raw materials

Class B temperature resistance 130 °, insulation structure composed of biotite, glass fiber, asbestos, etc. bonded or impregnated with suitable epoxy resin, and other inorganic materials, suitable organic materials or their components.

Class F temperature resistance 155 °, insulation structure composed of biotite, glass fiber, asbestos, etc. bonded or impregnated with suitable epoxy resin, and other inorganic materials, suitable organic materials or their components.

Class H temperature resistance 180 °, insulation structure composed of biotite, glass fiber, asbestos and other raw materials or their components bonded or impregnated with suitable epoxy resin (such as silicone resin).

Class C above grade temperature resistance of 180°, it is composed of biotite, glass fiber, biotite, porcelain, quartz stone and other raw materials or their compositions that are bonded or impregnated with suitable epoxy resin after coating. insulating structure.

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