Single-phase multi-pole permanent magnet stepping motor

Abstract

The invention discloses a single-phase multipole permanent-magnet stepping motor and relates to an electric motor. The single-phase multipole permanent-magnet stepping motor comprises a stator part and a rotor part. The motor is only provided with one centralized single-phase stator winding, and a stator structure is simple in structure and easy to manufacture. The magnetic pole number of the motor is four or six, a stepping angle of the motor is small, and stepping out or over stepping is not likely occur. The motor air gap is a mixed air gap, the air-gap uniform section of the magnetic pole I and the air-gap uniform section of the magnetic pole II have small motor air gaps, and the air-gap uniform sections are larger in width, so that the magnetic resistance of a magnetic circuit of the motor is smaller, and the motor is higher in efficiency. The motor air gaps of the air-gap uniform sections of the magnetic pole I and the magnetic pole II are gradually increased, magnetic distortions in the motor air gaps are small, and magnetomotive force harmonic loss of a stator is small. The single-phase multipole permanent-magnet stepping motor can meet the demand for high-precision and stable stepping motor operating technology of an electronic clock.

Description

technical field [0001] The invention relates to a single-phase multi-pole permanent magnet stepping motor, which relates to a motor, in particular to a single-phase multi-pole permanent magnet stepping motor applied to electronic clocks and watches. Background technique [0002] The motor used in electronic clocks adopts single-phase two-pole permanent magnet stepping motor. The motor adopts an uneven air gap, and the step angle is 180 degrees. Each pulse signal makes the rotor rotate 180 degrees along the direction of rotor rotation. The step angle of the single-phase two-pole permanent magnet stepping motor is relatively large, and it is prone to out-of-step phenomenon, that is, when the motor rotor has not completed a step, the second pulse signal follows one after another, making the rotor take one step less, resulting in timing failure. error. The rotor of a motor with a large step angle is prone to large oscillations, and the rotor oscillates back and forth in a stab...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the large step angle of the single-phase two-pole permanent magnet stepping motor, which is prone to out-of-step phenomenon, and overcome the shortcomings of the complex structure and difficult manufacture of the ordinary multi-pole permanent magnet stepping motor, and provide a Single-phase multi-pole permanent magnet stepper motor with one centralized stator winding

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