What are the important technical parameters of the stepper motor?
I. PrefaceThe stepper motor is an open loop control element that changes the electrical pulse signal into angular displacement or linear displacement. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, namely to add a pulse motor, the motor is turned to a step angle. The existence of this linear relationship, and stepper motor only periodic error and accumulated error etc.. It is very simple to control by stepping motor in the control field of speed, position and so on.Although the stepper motor has been widely used, but stepper motors can not be like ordinary DC motors, AC motors in the regular use. It must be composed of double ring pulse signal, power drive circuit and so on, and the control system can be used. Therefore, it is not easy to make good use of stepping motor. It involves many specialized knowledge, such as mechanical, electrical, electronic and computer.At present, the production of stepper motor manufacturers are indeed many, but with professional and technical personnel, can develop their own development, manufacturers are very few, most of the manufacturers, only twenty people, even the most basic equipment are not. Only in a blind imitation stage. This will give users a lot of trouble in product selection and use. As stated above, we have decided to take an extensive induction stepper motor as an example. Describe its basic working principle. I hope it will help the users in the selection, use and improvement of the whole machine.
6) lose step: when the motor runs, the number of steps is not equal to the number of steps in theory.7) misalignment angle: the rotor tooth axis offset the angle of the stator axis, the motor will have an offset angle, and the error caused by the offset angle can not be solved by subdivision drive.8) running torque frequency characteristic: the curve of the output torque and frequency measured by the motor under some test conditions.
Holding torque: when the stepper motor is energized, but the rotor does not rotate, the rotor locks the torque of the rotor.4) step angle: corresponding to a pulse signal, motor rotor rotation angular displacement.5) positioning torque: the motor in the state of no electricity, the motor rotor itself locking moment.
There are 8 main parameters.1) the number of stepper motor: refers to the number of coils within the motor, the current commonly used in two-phase, three-phase, five phase stepper motor.2) number of beats: the number of pulses required for a periodic change in a magnetic field, or the electrical conductivity of a magnetic field, expressed by m, or the number of pulses required to turn a motor's pitch angle.
