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Inner rotor permanent-magnet synchronous motor with staggered pole structure and low positioning force moment

A technology of permanent magnet synchronization and positioning torque, which is applied to synchronous motors with stationary armatures and rotating magnets. Effect of Detent Torque

Active Publication Date: 2013-06-12
黑龙江工大华工电机科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low positioning torque inner rotor permanent magnet synchronous motor with a staggered pole structure. In order to solve the inherent positioning torque of the existing permanent magnet synchronous motor, which restricts the low speed performance and high precision position control of the permanent magnet synchronous motor The scope of application in

Method used

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  • Inner rotor permanent-magnet synchronous motor with staggered pole structure and low positioning force moment
  • Inner rotor permanent-magnet synchronous motor with staggered pole structure and low positioning force moment
  • Inner rotor permanent-magnet synchronous motor with staggered pole structure and low positioning force moment

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specific Embodiment approach 1

[0009] Specific implementation manner one: such as figure 1 , figure 2 , image 3 As shown, it is composed of a first inner rotor permanent magnet synchronous motor 1 and a second inner rotor permanent magnet synchronous motor 2;

[0010] The inner rotor 1-2 of the first inner rotor permanent magnet synchronous motor 1 and the inner rotor 2-2 of the second inner rotor permanent magnet synchronous motor 2 are coaxially connected, and the N and S magnetic poles are mutually offset by 40°-50°; The outer stator 1-1 of the first inner rotor permanent magnet synchronous motor 1 is coaxially connected with the outer stator 2-1 of the second inner rotor permanent magnet synchronous motor 2 and the cogging is displaced by 15°-25°.

specific Embodiment approach 2

[0011] Specific implementation manner two: such as figure 1 , figure 2 , image 3 As shown, the difference between this embodiment and the first embodiment is that the N and S poles of the inner rotor 1-2 of the first inner rotor permanent magnet synchronous motor 1 and the inner rotor of the second inner rotor permanent magnet synchronous motor 2 The 2-2 N and S magnetic poles are offset by 42 degrees. The other composition and connection relationship are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific implementation manner three: such as figure 1 , figure 2 , image 3 As shown, the difference between this embodiment and the first embodiment is that the N and S poles of the inner rotor 1-2 of the first inner rotor permanent magnet synchronous motor 1 and the inner rotor of the second inner rotor permanent magnet synchronous motor 2 The 2-2 N and S magnetic poles are shifted by 45 degrees. The other composition and connection relationship are the same as in the first embodiment.

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Abstract

The invention provides an inner rotor permanent-magnet synchronous motor with staggered pole structure and low positioning force moment and relates to the technical field of permanent-magnet synchronous motors. The inner rotor permanent-magnet synchronous motor aims at solving the problem that the inherent positioning force moment of the existing permanent-magnet synchronous motor restricts the application range of the permanent-magnet synchronous motor in the low-speed performance and high-precision position control. The inner rotor permanent-magnet synchronous motor is characterized in that an inner rotor of a first inner rotor permanent-magnet synchronous motor and an inner rotor of a second inner rotor permanent-magnet synchronous motor are coaxially connected, and in addition, N and S magnetic poles are mutually staggered for 40 degrees to 50 degrees; and an outer stator of the first inner rotor permanent-magnet synchronous motor and an outer stator of the second inner rotor permanent-magnet synchronous motor are coaxially connected, and in addition, tooth grooves are staggered for 15 degrees to 25 degrees. The inner rotor permanent-magnet synchronous motor can effectively reduce the inherent positioning force moment of the permanent-magnet synchronous motor, the reduction amplitude is 25 percent to 30 percent of the inherent positioning force moment of the traditional motor, and the inner rotor permanent-magnet synchronous motor has the advantages that the structure is simple, and the cost is low.

Description

Technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors. Background technique [0002] Positioning torque is an inherent phenomenon of permanent magnet synchronous motors. It is the position-related positioning torque that exists in the permanent magnet synchronous motor when it is not energized. The positioning torque includes hysteresis positioning torque and reluctance positioning torque, mainly due to the stator The existence of cogging is caused by uneven reluctance of the motor. [0003] The positioning torque directly generates wave torque in the direct drive system, which has a great influence, especially on the low-speed performance and high-precision positioning of the position control system, thus restricting the permanent magnet synchronous motor in the low-speed performance and high-precision position control. Application range. Summary of the invention [0004] The purpose of the present invention is to provide an in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14
Inventor 胡建辉邹继斌赵猛江善林刘承军徐永向李勇尚静王骞赵博
Owner 黑龙江工大华工电机科技有限公司