Stepper motor general requirements of stepper motor working temperature range is 0 ~ 50 & deg; Humidity 20% ~ 90% RH; Save the temperature range is -20~70°And humidity 15 ~ 95% RH. Now for step motor using the environment requirements specification is as follows: the temperature needed some stepper motor insulation standard is the ULB level, this refers to the heat resistance at 130 motor insulation system & deg; Within, considering the motor internal and external temperature difference and the factor of safety, so require motor surface temperature is less than 100 degrees. Considering the general at room temperature in the 40 & deg; Within, so the rise of temperature of the motor coil control within 80 k. If the motor coil temperature more than limit temperature, the insulation system is easy to put the motor coil enameled wire and insulating tank, PCB insulation system such as burn out, lead to motor failure (Generally is open circuit, but also has a short circuit phenomenon)。 The parameters of the rated current of the motor is primarily calculated according to the motor can withstand heat. If the motor working environment temperature is higher, consider reduce the working current of the motor to reduce the temperature rise, eventually to control the motor internal heat insulation system can withstand the range. For example, if the environment temperature in 60 & deg; , the motor temperature rise will be controlled within 60 k. Because the vast majority of the stepper motor manufacturer of insulation material is a class B standard, higher levels of insulation material is almost impossible to corresponding or cost is too high, so in high temperature applications environment, a more realistic option is to control the rise of temperature of the motor, is to strengthen the cooling conditions or reduce the working current of the motor. Stepper motor temperature is too high, in addition to the safety of the insulation system, can also affect the stability of permanent magnets. Permanent magnets will increase with the temperature demagnetization, so as to reduce the working torque of the motor. Thick stepper motor magnets in 130 & deg; Within the demagnetizing factor is negligible, but some manufacturers of magnet even within the scope of the insulation system can withstand, has obvious attenuation problem of torque. Stepper motor temperature is too low, will make bearing grease solidification, thus lose bearing lubrication, so below 0 degrees should consider to choose low temperature under the condition of bearing. If the customer in the motor work before electricity heating up and achieve the requirements of the motor working temperature let motor rotation is also acceptable, but should set up corresponding equipment start-up process. If you use the low temperature resistant bearing, general temperature reached - motor concessions into the work45°, but the motor need to customize, generally don't do this kind of customized products, manufacturers need additional customization. About humidity demands to humidity with respect to the stepper motor, main is to avoid condensation inside the motor. The outer surface of the stepper motor rotor and the stator's inner surface of the silicon steel sheet in addition to processing time tu rust-proof oil generally no other measures rust, if the humidity is easy to condensation on the surface, causing rust. As a result of the stepper motor rotor and stator gap is very small, rusty spot is likely to be stuck rotor so that the motor failure. On the other hand is the humidity is too high, will also affect the insulation properties of insulating materials, for the work of general motors is low the small size of step motor general effect is not big, but for step motor driving voltage is higher, the effect still cannot be ignored. Resources: motor insulation refractory material level. UL to the insulation system authentication level according to the heat temperature from low to high is divided into: A E B Y F H C level. The following is the allowable working temperature (temperature classification℃)Is equivalent to the heat resistant grade of insulating materials is briefly. Y level and heat-resistant & 90 deg; With not varnished material such as cotton, silk and paper or its combination of insulation structure. So Y level is don't need to do what can do processing of materials. Grade A heat-resistant & 105 deg; With varnished or immersed in liquid dielectric (Such as transformer oil in the material such as cotton, silk and paper or its combination of insulation structure)。 E heat-resistant & 120 deg; By the use of synthetic organic film, synthetic organic enamel materials such as the combination of B and heat-resistant insulating structure & 130 deg; , with the right resin adhesive or after impregnation, coating, mica, glass fiber, such as asbestos, and other inorganic materials, organic materials or the combination of right of insulation structure. F and heat-resistant & 155 deg; , with the right resin adhesive or after impregnation, coating, mica, glass fiber, such as asbestos, and other inorganic materials, organic materials or the combination of right of insulation structure. H class 180 of heat-resistant & deg; With appropriate resin (Such as silicone resin)Glue or after impregnation, coating, mica, glass fiber, the material such as asbestos, or their combination of insulation structure. Grade C heat-resistant 180 above, with the right resin glue or after impregnation, coating, mica, glass fiber, and without dipping treatment of mica, ceramic, quartz and other materials, or their combination of insulation structure. Above is the working temperature and humidity of stepper motor is introduced, hoping to need friends to help.
