电机The insulation grade refers to the heat resistance grade of the insulating material used, which is divided into A, E, B, F and H grades。Allowable temperature rise refers to the temperature limit of the motor compared to the ambient temperature。

Temperature rise refers to the motor under rated operating conditions, the stator winding temperature is higher than the ambient temperature value (ambient temperature specified as 35℃ or below, if the nameplate does not indicate the specific value, it is 40℃)。

In hair motor In class 0 electrical equipment, insulation material is the weakest link。Insulation materials are particularly vulnerable to high temperatures, accelerating aging and damage。Different insulating materials have different heat resistance, and electrical equipment with different insulating materials has different high temperature resistance。Therefore, the maximum operating temperature of general electrical equipment is specified。

According to the high temperature resistance of different insulation materials, people have stipulated seven allowable maximum temperatures, respectively :Y, A, E, B, F, H, c, their allowable operating temperatures are 90, 105, 120, 130, 155, 180 and 180 degrees Celsius。Therefore, Class B insulation means that the insulation heat resistance temperature of the hair motor is 130 ° C。The user should ensure hair The motor insulation material shall not exceed this temperature when the hair motor is working, so as to ensure the normal operation of the hair motor。

Insulation class B insulation materials are mainly made of mica, asbestos and glass fibers bonded or impregnated with organic glue。

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