What's the use of a car stepping motor? What is the working principle?
The 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
Stepper motor has been widely used, but the stepper motor can not like ordinary DC motor, AC motor 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.
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. To this end, the 51 test network in Dragon Development Kit was first introduced in the stepper motor technology, grasp the user application.
The stepping motor type idle speed control valve is composed of a stepping motor, a screw mechanism, a by-pass valve, a valve seat, etc. the nut in the screw mechanism and the rotor of the stepping motor are made into a whole. The sliding spline is connected between the screw and the shell, so that the screw can not rotate, and can only move in a straight line along the axis. When the stepping motor rotates, the nut drives the screw axial movement of the rotor of the stepping motor rotates a circle, makes a movement of screw pitch, a valve core fixing screw, the screw moves forward or backward, or turn off a small spool drive bypass valve. By controlling the rotation direction and the rotation angle of the stepping motor, the computer can control the moving direction and the moving distance of the screw rod, thereby achieving the purpose of controlling the opening of the adjacent valve and adjusting the idle air intake.
