Hybrid Stepper Motor Control The Number Of Pulses
Hybrid Stepper Motor Control the number of pulses
Stepper motor is the electrical pulse signal into angular displacement or linear displacement of the open-loop control element stepper motor parts. In the case of non-overload, the motor speed, stop position depends only on the pulse signal frequency and the number of pulses, and not affected by load changes, when the stepper drive receives a pulse signal, it drives the stepper motor press The set direction is rotated by a fixed angle, called the "step angle," and its rotation is carried out step by step at a fixed angle. By controlling the pulse number to control the angular displacement, so as to achieve the purpose of accurate positioning; the same time by controlling the pulse frequency to control the motor speed and acceleration of rotation, so as to achieve the purpose of speed.
Stepper motor is an induction motor, its working principle is the use of electronic circuits, the DC into a time-sharing power supply, multi-phase sequence control current, with this current for the stepper motor, the stepper motor to work properly, The drive is a step-by-step power supply for the stepper motor, a multi-phase sequence controller.
Although the stepper motor has been widely used, but the stepper motor can not be like ordinary DC motor, AC motor used in the routine. It must be double ring pulse signal, power drive circuit and other components of the control system can be used. Therefore, it is not easy to make good use of stepper motors. It involves many specialized knowledge of machinery, motors, electronics and computers. Stepping motor some of the common fever problems
1, a reasonable range of stepper motor heating:
The extent to which the motor heats up depends mainly on the level of insulation inside the motor. Internal insulation at high temperatures (130 degrees above) will be destroyed. So as long as the internal does not exceed 130 degrees, the motor will not damage the ring, the surface temperature to 90 degrees below, so the stepping motor surface temperature of 70 to 80 degrees are normal. Simple temperature measurement methods are: with the point of the meter can also be roughly judged: the hand can touch 1 to 2 seconds or more, no more than 60 degrees; can only touch about 70 to 80 degrees; drop a few drops of water , Rapid gasification, then 90 degrees.
2, stepper motor fever with the speed of change:
Using constant current drive technology, the stepping motor in static and low speed, the current will remain constant in order to maintain constant torque output. High speed to a certain extent, the motor internal back EMF increases, the current will gradually decline, the torque will drop. Therefore, the heat due to copper loss is speed related. Normal and low speed, high fever, low fever at high speed. However, the iron loss (although a small percentage) changes in the situation is not always the case, and the motor heat is the sum of the two, so the above is only the general case.