stepper motor Humidity
Requirements for humidity:
Stepper motor on the humidity requirements, mainly to avoid condensation inside the motor. The outer surface of the stepper motor rotor and the inner surface of the stator silicon steel sheet in addition to the processing of anti-rust oil when the general no other measures to rust, if the humidity is too easy to condensation on the surface, causing rust. As the stepper motor rotor and stator clearance is very small, rust is likely to stuck the rotor so that the motor failure. On the other hand is the humidity is too high, will also affect the insulating properties of insulating materials for the general work of the motor is very small size stepper motor generally has little effect, but for the drive voltage is relatively high stepper motor, this effect is still not Can be ignored.
Reference material: motor insulation material heat - resistant material grade instructions.
UL will be the insulation system certification level according to the heat-resistant temperature from low to high divided into: Y A E B F H C level.
The following is a description of the maximum permissible operating temperature (° C) of the heat-resistant grade equivalent to the heat-resistant grade of the insulating material.
Y-type temperature of 90 °, with non-impregnated cotton yarn, silk and paper or other materials composed of insulation structure. So the Y-level is no need to do anything to deal with the material can be competent.
A temperature of 105 °, with impregnated or immersed in liquid dielectric (such as transformer oil in the cotton yarn, silk and paper or other materials or the composition of the insulation structure).
E-type temperature of 120 °, with synthetic organic film, synthetic organic enamel and other materials composed of the composition of the insulation structure
B-type temperature of 130 °, with the appropriate resin bonding or impregnation, coated mica, glass fiber, asbestos, etc., and other inorganic materials, suitable organic materials or composition of the composition of the insulation structure.
F-type temperature of 155 °, adhesion or impregnation with a suitable resin, coated mica, glass fiber, asbestos, etc., and other inorganic materials, suitable organic materials or compositions thereof.
H-type temperature of 180 °, with a suitable resin (such as silicone resin) adhesion or impregnation, coated mica, glass fiber, asbestos or other materials or composition of the insulation structure.
C-type temperature of 180 or more, with the appropriate resin adhesion or impregnation, coated mica, glass fiber, and without impregnation of mica, ceramics, quartz and other materials or composition of the insulation structure.