3, the stepper motor heating with the speed of the situation
With constant current drive technology, the stepper motor maintains a constant current at both static and low speeds to maintain constant torque output. The speed is high enough, the internal back EMF of the motor rises, the current will gradually drop, and the torque will drop. Therefore, the heat generated by the copper loss is related to the speed. Generally, the heat is high at static and low speeds, and low at high speeds. However, the change in iron loss (although the share is small) is not always the case, and the whole heat of the motor is the sum of the two, so the above is only a general situation.
4, the impact of fever
Although the motor heat does not generally affect the life of the motor, it is not necessary for most customers. However, when it is serious, it will bring some negative effects. If the thermal expansion coefficient of each part of the motor is different, the structural stress changes and the internal air gap changes slightly, which will affect the dynamic response of the motor, and the high speed will simply be out of step. In some cases, it does not allow excessive heating of the motor, such as medical equipment and high-precision testing equipment. Therefore, the necessary heating of the motor should be carried out.
