How does a Linear Stepper Motor Work

Stepper motor is a widely used type of electric motor, and the application of stepper motor in the motor market is also classified. Stepper motors are classified into linear stepper motors according to their inherent motion. Is the working principle and composition of the linear stepper motor linear as its name?

Linear stepper motor is rotated by the magnetic rotor iron core through the interaction with the pulsed electromagnetic field generated by the stator, and the linear stepper motor converts the rotary motion into linear motion inside the motor.

The basic principle of a linear stepper motor is to use a screw and a nut to mesh, and take some method to prevent the screw and nut from rotating relative to each other, so that the screw moves axially. Generally speaking, there are currently two ways to achieve this transformation. The first is to build a rotor with an internal thread in the motor, and the internal thread of the rotor and the screw are meshed to achieve linear motion. The second is to use the screw as the motor exits the shaft, and the external driving nut and the screw are engaged by an external driving nut to realize linear motion. The result of this is a greatly simplified design, enabling the use of linear stepper motors for precise linear motion without the need for external mechanical linkages in many applications.

There are not only unidirectional linear stepper motors but also bidirectional linear stepper motors. The bidirectional linear stepper motor converts the electrical pulse signal into angular displacement to control the rotation of the rotor. In the automatic control device as the actuator. Each time a pulse signal is input, the bidirectional linear stepper motor advances one step, so it is also called a pulse motor. Bidirectional linear stepper motors are mostly used in peripheral equipment of digital computers, as well as devices such as printers, plotters and magnetic disks.

The driving power supply of the bidirectional linear stepper motor is composed of a variable frequency pulse signal source, a pulse distributor and a pulse amplifier, from which the driving power supply provides pulse current to the motor windings. The running performance of the bidirectional linear stepper motor depends on the good cooperation between the motor and the driving power supply.

Linear stepper motors are widely used in many high-precision requirements including manufacturing, precision calibration, precision fluid measurement, and precise position movement.

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