Stepper motor structure and working principle
Stepper motor structure and working principle

Stepper motor structure and working principle:
1. A stepping motor is an open-loop control element that converts electrical pulse signals into angular or linear displacement. Under non-overload conditions, the speed and stop position of the motor only depend on the frequency and pulse number of the control pulse signal.
2. The greater the number of pulses, the greater the angle of motor rotation.
3. The higher the pulse frequency, the faster the motor speed, but it cannot exceed the maximum frequency, otherwise the torque of the motor will decrease rapidly and the motor will not rotate.
According to the principle of torque generation, it can be divided into:
(1) Reactive type: The rotor has no windings, and the reaction torque generated by the excited stator windings realizes stepping operation.
(2) Excitation type: Both stator and rotor have exciting windings (or permanent magnetic steel for the rotor), and stepping operation is realized by electromagnetic torque.

According to the output torque, it can be divided into:
(1) Servo type: output torque of a few percent to a few tenths (N.m) can only drive small loads, and it must be used with a hydraulic torque amplifier to drive larger loads such as machine tool tables
(2) Power type: The output torque is above 5 ~ 50 N.m, which can directly drive larger loads such as the machine tool table.
(1) Single stator type (2) Double stator type (3) Three stator type (4) Multi-stator type
It can be divided according to the winding distribution of each phase;
(1) Radially distributed: the phases of the motor are arranged in turn according to the circumference
(2) Axial distribution: the phases of the motor are arranged in order according to the axial direction

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