Linear stepper motor, or 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 working 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 an external drive nut engages with the screw outside the motor to achieve 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. Linear stepper motors are widely used in many high-precision requirements including manufacturing, precision calibration, precision fluid measurement, and precise position movement.
Features of linear stepper motors
The linear stepper motor converts the rotary motion into linear motion inside the motor, which is realized by the rotation of the magnetic rotor core through the interaction with the pulsed electromagnetic field generated by the stator.
The conversion of stepper motors from rotary motion to linear motion can be accomplished by several mechanical methods, including rack and pinion drives, belt and pulley drives, and other mechanical linkages. All these designs require various mechanical parts. The most efficient way to accomplish this transition is within the motor itself. Linear stepper motors have high durability and are maintenance-free. Due to the brushless design of stepper motors, the only parts that wear out are the rotor shaft and the threaded engagement consisting of the lead screw/nut. Improvements in ball bearings over the years have provided long-life types suitable for linear motion.
How to calculate the power of linear stepper motor?
Generally speaking, stepper motors are used for speed regulation within a large range, so that their power will naturally change, so generally we use torque to measure directly, then this torque and power How is the conversion between them?
P = Ω · M Ω=2 π · n / 60 P = 2 π n M / 60
P – the power unit wattage
Ω – the angular velocity per second
n – the rotational speed
M – the torque
We use the unit of Newton·m to express.
There is also P = 2 π f M / 400 (this is in the half-step working state)
f – the number of pulses per second (we refer to PPS for short)
The stepper motors is that as the speed increases, the torque will drop sharply, and the relationship between the two is non-linear, so we can measure the output power of a stepper motor at different speeds.