Introduction to Stepper Motors

Stepper motor is an open-loop control motor that converts electrical pulse signals into angular displacement or linear displacement. It is the main executive element in modern digital program control systems and is widely used. . In the case of non-overload, the speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by the load change. When the stepper driver receives a pulse signal, it drives the stepper motor to press The set direction is rotated by a fixed angle, called "step angle", and its rotation is performed step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning; at the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation.

Stepper motor is a kind of induction motor. Its working principle is to use electronic circuit to turn DC power into time-sharing power supply, and multi-phase sequence control current. Use this current to power the stepper motor, so that the stepper motor can work normally. The driver is a time-sharing power supply for the stepper motor, a multi-phase sequence controller.

Although stepper motors have been widely used, stepper motors are not like ordinary DC motors, and AC motors are conventionally used. It must be used by the control system composed of double ring pulse signal, power drive circuit, etc. Therefore, it is not easy to make good use of stepper motors. It involves many professional knowledge such as machinery, motors, electronics and computers. As an actuator, stepper motor is one of the key products of mechatronics and is widely used in various automation control systems. With the development of microelectronics and computer technology, the demand for stepper motors is increasing day by day, and they are used in various fields of the national economy.