Iron coreless permanent magnet limited angle motor

Abstract

The invention discloses an iron coreless permanent limited angle motor and relates to limited angle motors. The iron coreless permanent limited angle motor aims at solving the problems of low air-gap magnetic flux density, relatively low momentum density and relatively large inductance of an existing wound-rotor limited angle direct current torque motor and the problem of circulation current of a winding of a moving-coil limited angle motor of an ordinary radial magnetic circuit structure. A bearing seat is fixedly connected with the sealed end of a shell, the inner stator and the outer stator are fixed together, the motor shaft is arranged inside the bearing seat and the support through a bearing, the outer stator is arranged on the bearing seat in a sleeve mode, the outer circumference side surface and the inner circumference side surface of the inner stator and the outer stator are fixedly provided with inner permanent magnet steel and outer permanent magnet steel and form a closed magnetic circuit structure, frames are arranged between the inner permanent magnet steel and the outer permanent magnet steel, a plurality of winding coils are fixedly wound on the frame, air gaps exist between the frames and the inner permanent magnet steel and the outer permanent magnet steel, the number of the groups of the winding coils is equal to the number of the magnetic poles, every two neighboring winding coils are opposite in winding directions and are connected in series, the frames are fixedly connected with supports, and the opening end of the shell is detachably connected with an end cover. The iron coreless permanent limited angle motor is applicable to a scanning mechanism and a servo positioning system.

Description

technical field [0001] The invention relates to a limited rotation angle motor, which belongs to the field of motors. Background technique [0002] In the automatic control system, the motor is an indispensable actuator. In some special occasions, the actuator is only required to rotate within a limited angle. At this time, the limited angle motor is often considered. Compared with the traditional electric excitation motor and permanent magnet motor, the limited rotation angle motor has obvious advantages in the difficulty of control and the cost of the system, and has the advantages of small torque fluctuation, large output torque, easy control and good maintainability. However, the traditional moving iron limited-angle motor has a large moment of inertia and slow response speed. If the limited-angle motor has a cogged structure, although it can ensure a high air-gap magnetic density, it will generate a large torque. Fluctuations have a great impact on the maximum swing an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a coreless permanent magnet type limited angle motor to solve the problem of low air gap flux density, low torque density, large inductance and general radial magnetic circuit structure of the existing winding type limited angle DC torque motor The circulation problem in the winding of the moving coil limited angle motor

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