Characteristics of Linear Stepper Motors

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

The basic principle of linear stepping motor: a screw and a nut are engaged, and some method is used to prevent the relative rotation of the screw and nut, 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 The motor exits the shaft, and an external drive nut engages with the screw outside the motor to achieve linear motion. The result 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 stepping 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 stepping motor?

Generally speaking, stepper motors are used for speed regulation in a large range, so that their power will naturally change, so generally we use torque to measure directly, then this torque and How is the power converted? Still looking down.

P=Ω·M Ω=2π·n/60 P=2πnM/60

Remarks: P refers to the power unit wattage Ω refers to the angular velocity per second, the unit is radian n refers to the rotational speed M refers to the torque We use the unit Newton·m to express.

There is also P=2πfM/400 (this is in the half-step working state) where f is the number of pulses per second (we refer to PPS for short)

In some cases, the characteristic of the stepper motor is that as the speed increases, the torque will drop sharply, so the relationship between the two is non-linear, so we have a stepper motor at different speeds. The output power is also quite different.

We can completely calculate the power of this motor at any speed according to the formula P=2πnM/60. As long as you remember this, you can fully know the power calculation method of the stepper motor. This formula is what you need remember.