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​Hybrid stepper motor​ is an electromagnetic stepper motor, whose movement is based on electromagnetic force and is composed of permanent magnets and electromagnets. Generally speaking, hybrid stepper motors are divided into two types: single-phase hybrid stepper motors and two-phase hybrid stepper motors.

The characteristic of single-phase hybrid stepper motors is that there is only one segmenter, and the relationship between its position and the number of poles will produce an imbalance in the distribution of magnetic flux inside and outside the electromagnet of the winding, thereby realizing step rotation. The characteristic of two-phase hybrid stepper motors is that there are two segmenters, and the relationship between their position and the number of poles will produce a two-phase rotating magnetic field, which is used to drive the rotor to step rotation.

1. Select suitable electromagnets and permanent magnets

The electromagnets and permanent magnets of hybrid stepper motors are the core parts, so the selection of suitable materials can effectively improve the performance of stepper motors. When selecting an electromagnet, factors such as the number of turns, cross-sectional area, and wire diameter of the coil need to be considered, and the magnetism of the permanent magnet must be matched to achieve a better electromagnetic effect.

2. Determine the step angle and step angle

The step angle refers to the rotor angle required for each step of the rotor, and the step angle refers to the electrical angle required for the electromagnet to change from one state to another. The two are closely related and need to be determined by calculation.

3. Calculate the parameters of the stepper motor

After determining the materials of the electromagnet and the permanent magnet, it is necessary to calculate the electromagnetic parameters of the stepper motor, including the resistance, inductance, and magnetic flux of the electromagnet. These parameters must take into account the step angle and step angle, and comprehensively consider performance factors such as torque and speed.

Take a two-phase hybrid stepper motor as an example, assuming that its parameters are: resistance 1.2Ω, inductance 3.5mH, permanent magnet flux 0.35T, stator pole number 8, and rotor pole number 4. Based on these basic parameters, we can calculate the step angle, step angle and speed of the stepper motor according to the above method, and further design and optimization can be carried out accordingly.

In short, the hybrid stepper motor is a kind of motor widely used in modern industry, with the advantages of high precision, low noise and low vibration.