Shanghai four macros stepper motor as a digital performance of the components, widely used in the motion control system. Brother carefully in the use of stepper motor, will find that when the stepper motor operation branch of fever, not the same degree of stepper motor heating is different also, this kind of appearance is bound to cause you worries, in fact, the fever is a common symptom, let's know the conflict on hot, motor operation, high speed, is bound to conflict and fever, so how to reduce the Shanghai four macros stepper motor fever? Above all, want to know why stepper motor heating on all kinds of stepping motor, internal are composed of iron core and the windings. Will happen winding resistance, electric loss, the loss is proportional to the square of the intrusive and resistance and current, this is we often say that copper loss, if the current is not a specification dc or sine wave, harmonic loss will happen; Core has hysteresis eddy current effect, can also occur in the alternating magnetic field loss, the intrusive and data, current, frequency, voltage, this is called iron losses. Copper loss and iron loss will be displayed in the form of heat, and then influence the power of the machine. Stepper motor usually seek position precision and torque output, low power, is usually large current, high harmonic components, the frequency of the alternating current is also change with speed, thus stepping motor are widespread fever, and severe conditions than the usual communication motor. Second, the stepper motor heating control in a reasonable range of fever promised to what degree, mainly depends on the internal motor insulation class. Internal insulation at high temperature (More than 130 degrees)Will be damaged. Are no more than 130 degrees, so just internal motor will not damage, while the surface temperature under 90 degrees. So, step motor surface temperature in 70 -80 degrees are normal. Simple useful point thermometers, temperature measurement method can also be roughly judging: 1 - to contact with the handMore than 2 seconds, do not surpass 60 degrees; Can only touch with the hand, around 70 -80 degrees; Drop a few drops of agile gasification, more than 90 degrees; A temperature measuring gun, of course, also can be used to detect. Third, stepper motor heat change with speed condition with constant current driver skills, the stepper motor under static and low speed, the current will remain relatively stable, in order to keep constant torque output. High speed to necessarily degree, higher motor internal counter potential, current will reduce gradually, the moment will reduce. Therefore, because of the copper loss of heat condition is related to the speed. Static and low speed is usually high fever, high speed low fever. But the iron losses (Although the share of smaller)Change the condition of not so much, and motor of the fever is the sum of the two, so the only usually. Fourth, the effects of heating motor fever usually does not affect its stature, for most customers don't need to ignore. However, the severe fever will bring some negative impacts. Such as motor internal stress of each part of the thermal expansion coefficient of different layout of tiny change, change and internal air gap will affect the motor dynamic echo, high-speed will simply out of step. And as some places do not allow excessive heating of the motor, such as medical equipment and precision test equipment, etc. So for the motor heating shall carry out the necessary control. Finally, the cutting motor fever fever, cuts is cut copper loss and iron loss. Reduce copper loss, there are two directions, cutting resistance and current, choose as far as possible when it's demand in the selection of small resistance and the rated current of the motor, the two-phase motor, motor without parallel in tandem. But this is often in conflict with torque and high speed. About has selected motor, should make full use of the drive active flow control function and offline function, the former voluntary reduction in current when motor is static, the latter may just as well to the current block. In addition, the subdivision driver because current waveform near sine, less harmonic, electric heating will be less. Cutting method of iron loss, voltage grade related, despite high pressure driven motor leads to improve the characteristic of high speed, but also brings hot add. So should choose appropriate driving voltage level, recommend suite as a whole, the stability and heat, noise, etc. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
