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Staggered pole structure low positioning torque outer rotor permanent magnet synchronous motor

A technology of permanent magnet synchronization and positioning torque, which is applied to synchronous motors with stationary armatures and rotating magnets, etc., to achieve the effects of low cost, reduced inherent positioning torque, and simple structure

Active Publication Date: 2015-09-09
芯掣科技(浙江)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 detent torque external rotor permanent magnet synchronous motor with staggered pole structure to solve the problem of how to reduce the inherent detent torque of traditional permanent magnet synchronous motors by 25%-30%

Method used

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  • Staggered pole structure low positioning torque outer rotor permanent magnet synchronous motor
  • Staggered pole structure low positioning torque outer rotor permanent magnet synchronous motor
  • Staggered pole structure low positioning torque outer rotor permanent magnet synchronous motor

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specific Embodiment approach 1

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

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

specific Embodiment approach 2

[0011] Specific implementation mode two: as figure 1 , figure 2 , image 3 As shown, the difference between this embodiment and the first embodiment is that the N and S magnetic poles of the outer rotor 1-1 of the first outer rotor permanent magnet synchronous motor 1 and the outer rotor of the second outer rotor permanent magnet synchronous motor 2 The N and S magnetic poles of 2-1 are misaligned by 42 degrees. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific implementation mode three: as figure 1 , figure 2 , image 3 As shown, the difference between this embodiment and the first embodiment is that the N and S magnetic poles of the outer rotor 1-1 of the first outer rotor permanent magnet synchronous motor 1 and the outer rotor of the second outer rotor permanent magnet synchronous motor 2 The N and S magnetic poles of 2-1 are misaligned by 45 degrees. Other compositions and connections are the same as in the first embodiment.

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Abstract

The invention provides an outer 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 outer 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 outer rotor permanent-magnet synchronous motor is characterized in that an outer rotor of a first outer rotor permanent-magnet synchronous motor and an outer rotor of a second outer 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 inner stator of the first outer rotor permanent-magnet synchronous motor and an inner stator of the second outer rotor permanent-magnet synchronous motor are coaxially connected, and in addition, tooth grooves are staggered for 15 degrees to 25 degrees. The outer 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 outer 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] The positioning torque is an inherent phenomenon of the permanent magnet synchronous motor. It is the positioning torque that exists in the non-energized state of the permanent magnet synchronous motor and is related to the position. The positioning torque includes hysteresis positioning torque and reluctance positioning torque, mainly due to the stator The existence of cogging makes the motor reluctance uneven. [0003] The positioning torque directly produces fluctuating 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 low-speed performance and high-precision position control of the permanent magnet synchronous motor. application range. Contents of the invention [0004] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/22
Inventor 胡建辉徐永向邹继斌赵猛江善林刘承军李勇尚静王骞赵博
Owner 芯掣科技(浙江)有限公司