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Double-channel axial reluctance type rotary transformer

A rotary transformer and axial magnetic technology, applied in the direction of transformers, fixed transformers or mutual inductance, transformer/inductor cores, etc., can solve the problems of low measurement accuracy and easy to be affected by eccentricity, so as to ensure test accuracy and good consistency , the effect of simple structure

Pending Publication Date: 2020-10-13
NANJING UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The purpose of the invention is to provide a dual-channel axial reluctance rotary transformer to solve the problems of being easily affected by eccentricity and low measurement accuracy

Method used

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  • Double-channel axial reluctance type rotary transformer
  • Double-channel axial reluctance type rotary transformer
  • Double-channel axial reluctance type rotary transformer

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as Figure 1-6 As shown, the dual-channel axial reluctance rotary transformer disclosed in the present invention includes two stators and two rotors, the two rotors face the two stators respectively, and the two stators are respectively the first stator 5 and the second stator 6. The two rotors are provided with convex stages on the side opposite to the stator. Of the two rotors, the first rotor 1 is provided with four convex stages, and the second rotor 4 is provided with one convex stage. This setting can not only obtain the absolute position of the rotating shaft, but also Higher measurement accuracy can be obtained. The two stators are respectively installed on both sides of the stator bracket. The stator includes a stator core and a multi-layer PCB board 8. The inner cavity of the stator bracket is provided with stator teeth 9 at equal intervals around...

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Abstract

The invention discloses a double-channel axial reluctance type rotary transformer Comprising a stator support. Stators are installed on the two sides of the stator support. Rotors are respectively arranged opposite to the two stators; convex poles are arranged on one sides, opposite to the stator, of the two rotors; each stator comprises a stator iron core and multiple layers of PCBs; stator teethare arranged in the circumferential direction of an inner cavity of the stator support at equal intervals; one side of the stator iron core penetrates through the stator teeth to be connected with the stator support, the other side of the stator iron core is connected with the multiple layers of PCBs, and the multiple layers of PCBs are provided with excitation windings and two-phase signal windings. When eccentricity occurs, the length of the air gap is not changed; meanwhile, the cross section area of the rotor always covers the projection of the winding on the stator iron core, so that secondary guarantee for the rotary transformer to resist eccentricity is provided; while the test accuracy is ensured, the absolute position information of the rotor can be provided. Moreover, the structure is simple, the assembly is convenient, and the product consistency is high.

Description

technical field [0001] The invention relates to a rotary transformer, in particular to a dual-channel axial reluctance rotary transformer. Background technique [0002] Permanent magnet synchronous motors driven by frequency converters require position sensors to provide absolute rotor position signals for communication and control algorithms. Reluctance resolvers have been widely used in harsh environments as shaft position detection units due to their high reliability. Existing reluctance resolvers usually adopt the form of radial variable reluctance, that is, the structural design is carried out through the change of the radial air gap length, which fundamentally causes this type of resolver to be sensitive to the radial eccentricity of the stator and rotor, which is easy to cause measurement Accuracy is reduced. At the same time, the manufacturing method of winding on the stator teeth is labor-intensive, the product consistency is low, and it is easy to introduce addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/00H02K24/00H02K3/28H02K1/18H02K1/14H01F38/18H01F27/32H01F27/30H01F27/28H01F27/26H01F27/24H01F27/22H01F19/00
CPCH01F19/00H01F27/22H01F27/24H01F27/266H01F27/2804H01F27/2876H01F27/306H01F27/327H01F38/18H01F2027/2809H02K1/146H02K1/18H02K3/28H02K16/00H02K24/00H02K2213/03
Inventor 殷德军潘海虹
Owner NANJING UNIV OF SCI & TECH
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