A two-phase stepper motor

Abstract

The invention provides a two-phase stepping motor. The two-phase stepping motor comprises a shell, permanent magnets, a rotor core, stator poles, an A-phase armature winding, a B-phase armature winding and a shaft; two parallel stator poles form a pair of stator poles; totally eight pairs of uniformly distributed stator poles are arranged; the permanent magnet is clamped at one end of a pair of stator poles near outside of the circumference; the eight permanent magnets are magnetized along the circumferential tangential direction; furthermore, the magnetizing directions of the eight permanent magnets are same; the rotor core has 14 uniformly distributed convex poles; the polar distance of the two stator poles on the same pair of stator poles is equal to the polar distance of rotor poles; a centralized armature coil is wound on each stator pole; and the armature coils of two poles on the same pair of stator poles are opposite in winding direction and same in phase. Because a structure that the permanent magnet is clamped at one end of each pair of stator poles near outside of the circumference is adopted, the two-phase stepping motor provided by the invention has the advantages of being short in magnetic linkage and low in loss; furthermore, the rectangular permanent magnet is embedded in a stator core; therefore, heat dissipation can be conveniently carried out; a rotor is simple in structure; and thus, the rotor is suitable for high-speed rotation.

Description

technical field [0001] The invention relates to a two-phase stepping motor and belongs to the field of special motors. Background technique [0002] Motors play a very important role in many control fields. Various control methods based on motors play a pivotal role in the field of automation. Its progress is closely related to the economic development of the entire country, and its impact is very significant. As a digital motor, the stepper motor is relatively cheap, easy to operate, very accurate in positioning, and has the characteristics of non-accumulation of errors, so it is widely used in the field of digital control, servo control system, printing and other industrial automation control. [0003] Compared with traditional motors, stepper motors have certain particularities in structure. Two-phase stepper motors are often used as the main components of important driving devices, which puts forward higher requirements for the performance of stepper motors. [0004] Am...

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Problems solved by technology

[0007] At present, the applicant has searched at home and abroad, but has not yet found a structure in which the permanent magnet used in the two-phase stepping motor involved in the present invention is located in the middle of a pair of stator poles and close to the side of the casing, and the adjacent windings are wound in opposite directions.

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