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Permanent magnet finite angle motor without magnetic yoke structure

A technology with limited rotation angle and yoke structure, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, electric components, etc., can solve the problems of low air gap magnetic density, low power density, slow response speed, etc., to achieve Effects of reduced weight, reduced moment of inertia, and improved response speed

Active Publication Date: 2015-12-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a permanent-magnet limited-rotation-angle motor with no magnetic-conducting yoke structure, so as to solve the problem of low air-gap magnetic density, small power density, large moment of inertia and slow response speed of existing moving-iron type limited-rotation-angle DC torque motors. The problem

Method used

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  • Permanent magnet finite angle motor without magnetic yoke structure
  • Permanent magnet finite angle motor without magnetic yoke structure
  • Permanent magnet finite angle motor without magnetic yoke structure

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specific Embodiment approach 1

[0021] Specific implementation mode one: as Figure 1 to Figure 5 As shown: permanent magnet finite angle motor without magnetic yoke structure, said permanent magnet finite angle motor without magnetic yoke structure includes inner rotor 6, outer rotor 1, inner permanent magnet 2, outer permanent magnet 5. The motor shaft 8 and the bearing seat 9; the inner rotor 6 and the outer rotor 1 are fixed together, the motor shaft 8 is installed in the bearing seat 9 through the bearing 10, the center hole 11 is provided in the middle of the outer rotor 1, and the bearing seat 9 is installed outside In the central hole 11 of the rotor 1, it is fixedly connected with the outer rotor 1, and the motor shaft 8 is arranged coaxially with the inner rotor 6 and the outer rotor 1. The permanent magnet type limited-angle motor without a magnetic yoke structure also includes the coreless type The stator, the coreless stator includes a skeleton 4, a support 7 and multiple sets of winding coils 3...

specific Embodiment approach 2

[0026] Specific implementation mode two: as Figure 1 to Figure 5 As shown in the specific embodiment 1 of the non-conductive yoke structure permanent magnet limited angle motor, the inner rotor 6 and the outer rotor 1 are made of aluminum, plastic or carbon fiber materials. The light weight reduces the moment of inertia of the motor and improves the response speed of the motor.

[0027] The working principle of the present invention is as follows:

[0028] When the winding coil 3 is fed with direct current, because the winding directions of the adjacent winding coils 3 on the skeleton 4 are opposite, then at a certain moment, the current direction in the winding coil 3 is as follows: Figure 4 As shown, the magnetization method of the closed magnetic circuit is as follows Figure 5 As shown, this annular closed magnetic circuit structure can effectively increase the air gap magnetic density of the motor, thereby increasing the torque density of the motor, and the torque den...

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Abstract

The invention discloses a non-magnetic yoke structure permanent magnet limited angle motor, relates to a limited angle motor, and aims to solve the problems of low air-gap flux density, small power density, large rotary inertia and slow response of an existing moving-iron limited angle direct current torque motor. Inner rotors and outer rotors are fixed together, a motor shaft is mounted in a bearing block through bearings, the bearing block is mounted in center holes of the outer rotors and fixedly connected with the outer rotors, a support is fixedly connected with the motor shaft, the inner rotors and the outer rotors are made of non-magnetic materials, outer permanent magnet steels are fixed on the side faces of the outer circumferences of the inner rotors, inner permanent magnet steels are fixed on the side faces of the inner circumferences of the outer rotors, frameworks are arranged among the inner permanent magnet steels and the outer permanent magnet steels, multi-group winding coils are fixedly wound on the frameworks, air gaps are reserved among the frameworks, the inner permanent magnet steels and the outer permanent magnet steels, the group number of the winding coils is as same as the pole number of magnetic poles, the winding directions of every two adjacent winding coils are opposite, every two adjacent winding coils are serially connected, and the frameworks are fixedly connected with the support. The non-magnetic yoke structure permanent magnet limited angle motor is used for 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] The research on limited rotation angle motors began in the 1970s. Initially, due to its simple control method and cost savings, it was widely used in many automatic control systems that only required the motor to swing within a limited rotation angle. Most of the initial limited-angle motors have a bilateral excitation structure. With the development of permanent magnet materials, permanent magnet limited-angle motors have also emerged as the times require. Most of the formed limited-angle motor products now have a stator with a winding structure, that is, the coil is evenly wound on a circular magnetic conducting ring, and the rotor is a permanent magnet structure. This structure greatly increases the air gap of the motor. Therefore, it is difficult to obtain a higher power density, and it is not suitable for occasions requirin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K16/02H02K1/27H02K1/28H02K3/47
Inventor 邹继斌禹国栋徐永向李勇尚静胡建辉刘承军赵猛江善林赵博王骞
Owner HARBIN INST OF TECH
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