Flat stepping motor

Abstract

The invention discloses a flat stepping motor. In a motor, N same magnetic steels are uniformly fixed and embedded on a disc-shaped turntable. The magnetic fields of the magnetic steels are in the same direction. An output shaft is fixed at the center of the turntable, and n same electromagnetic seats are uniformly fixed in a front end cover shell. An electromagnetic coil is fixed on the outer edge of the electromagnetic seat, and m magnetic salient poles identical to the magnetic steels are fixed in each electromagnetic seat. The angle of the center line of m magnetic salient poles in adjacent electromagnetic seats deviating from the center line of the electromagnetic seats is 360 degrees / nN. The rear end cover is the same as the front end cover. The output shaft is rotatably mounted on the front and rear end covers. The magnetic salient poles of the two end covers are opposite in a one-to-one manner, and a rotor is clamped between the two. The opposite electromagnetic coils of the front and rear end covers are connected in parallel or series and then connected with an output pole of the controller. The electromagnetic field of the coil and the magnetic field of the magnetic steel are in the same direction. The controller outputs pulses to the coils sequentially, and the rotor is pulled by the electromagnetic force to rotate. Since the ratio of the axial length to the diameter can reach 1:3, the flat stepping motor disclosed by the invention is convenient to mount; and moreover, the flat stepping motor has the advantages of good torque property, small rotational inertia and stable operation, and is convenient to control.

Description

(1) Technical field [0001] The invention relates to a stepping motor, in particular to a flat stepping motor. (2) Background technology [0002] The stepper motor is a kind of induction motor, which is an open-loop control stepper motor component that converts the angular displacement of the electrical pulse signal. In the case of non-overload, the speed and stop of the stepper motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by load changes. Therefore, stepper motors are widely used as actuators that convert electrical pulses into angular displacements. At present, stepper motors are mainly divided into three types: excitation type, reactive type and hybrid type. The excitation stepper motor is generally two-phase, with small torque and volume, and the step angle is 7.5 degrees or 15 degrees. Reactive stepper motors are generally three-phase, which can achieve high torque output, and the step angle is generally 1.5 degrees...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage is that the axial dimension is relatively large. The shape of the base shell and the motor rotor of the common stepping motor are long cylinders, that is, the axial dimension is larger than the diameter, and can only be used in places with relatively spacious space.

For example, in compact mechanisms such as automobile power window drives and computer hard disk drives, stepping motors are difficult to use

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