Hybrid stepping motor with stator embedded with strip-shaped permanent magnets

Abstract

The invention relates to a hybrid stepping motor with a stator embedded with strip-shaped permanent magnets, which comprises a rotor, a rotor iron core and a rotor rotating shaft, and the rotor overlays the rotor iron core, the rotor rotating shaft is arranged in the rotor iron core, and gears are uniformly distributed on the outer circumference of the rotor; the stator comprises a stator iron core, a stator winding, a permanent magnet and a casing, wherein magnetic poles are distributed at the inner periphery of the stator core, small teeth with the same tooth pitch as a gear on the rotor areuniformly distributed on a pole shoe of each magnetic pole, and a pole body of each magnetic pole is provided with a phase stator winding; the permanent magnet grooves are formed in the yoke part ofthe stator core and are used for placing the strip-shaped permanent magnets; and the permanent magnets are arranged at intervals of one magnetic pole and are arranged alternately according to a certain sequence.

Description

technical field [0001] The invention relates to the technical field of hybrid stepping motor equipment, in particular to a hybrid stepping motor with a stator embedded with bar-shaped permanent magnets. Background technique [0002] Hybrid stepper motor is a stepper motor designed by combining the advantages of permanent magnet and reactive. It is divided into two-phase, three-phase and five-phase. The two-phase step angle is generally 1.8 degrees, the three-phase step angle is generally 1.2 degrees, and the five-phase step angle is generally 0.72 degrees. The rotor itself is magnetic, so the torque generated under the same stator current is greater than that of the reactive stepper motor, and its step angle is usually smaller. Therefore, economical CNC machine tools generally need to be driven by a hybrid stepper motor. However, the structure of the hybrid rotor is relatively complex, the rotor inertia is large, and its rapidity is lower than that of the reactive stepper m...

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Problems solved by technology

[0004] For this reason, the present invention provides a hybrid stepper motor with bar-shaped permanent magnets embedded in the stator to overcome the above-mentioned problems of high processing difficulty, low utilization rate of permanent magnets, poor heat dissipation, and difficult maintenance and replacement.

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