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A stator permanent magnet rotary transformer

A rotary transformer and permanent magnet technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, magnetic circuit, etc., can solve the problems of unsuitability for engineering applications and high cost, and achieve low power consumption and simple decoding Effect

Active Publication Date: 2021-11-02
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution requires extremely high-frequency signal injection at high speeds, and requires an extremely high-performance signal decoding processor. The cost is too high and it is not suitable for engineering applications.

Method used

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  • A stator permanent magnet rotary transformer
  • A stator permanent magnet rotary transformer
  • A stator permanent magnet rotary transformer

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Embodiment Construction

[0022] In the stator permanent magnet rotary transformer proposed by the present invention, the rotor core 21 is provided with a plurality of rotor salient poles 22 extending along the direction of the rotating shaft, and the projection of each rotor salient pole 22 on a plane perpendicular to the rotating shaft is directed toward The protruding arcs of the stator core 11 and the projected arcs of all the rotor salient poles 22 on a plane perpendicular to the rotating shaft form a closed curve.

[0023] Specifically, the present invention can be applied to a stator permanent magnet resolver in which the rotor is located at the inner periphery of the stator, and can also be applied to a stator permanent magnet resolver in which the stator is located at the inner periphery of the rotor.

[0024] The present invention will be described below in conjunction with a specific embodiment.

[0025] refer to figure 1 , a stator permanent magnet rotary transformer proposed in this embod...

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Abstract

In the stator permanent magnet rotary transformer proposed by the present invention, permanent magnets are installed on the stator core, and the magnetization directions of adjacent permanent magnets are opposite; rotor salient poles are arranged on the outer side of the rotor core, and each rotor salient pole is on a plane perpendicular to the rotating shaft The projections on are all convex arcs towards the stator core. In the present invention, when the rotor moves at high speed, the position of the rotor can be measured according to the no-load back EMF signal obtained by the sine feedback winding and the cosine feedback winding without inputting a high-frequency signal to the excitation winding, with low power consumption and simple decoding.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a stator permanent magnet rotary transformer. Background technique [0002] As a small AC motor for angle measurement, the resolver is widely used in the electromagnetic field. [0003] In the prior art, the most commonly used resolver is a reluctance resolver. A commonly used reluctance resolver is composed of a stator and a rotor. The rotor core is inserted into a central hole formed by a plurality of stator teeth, or an axial hole is provided inside the rotor core, and the stator is inserted into the axial hole. The stator teeth are located between the rotor core and the stator core and form an air gap with the rotor core. [0004] In the prior art, a reluctance resolver injects a high-frequency voltage signal into the winding and modulates it with air-gap reluctance to obtain a feedback electrical signal containing position information, thereby measuring the rotor posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K24/00H02K1/24H02K1/17H02K1/14
CPCH02K1/146H02K1/17H02K1/24H02K24/00
Inventor 丁石川罗哲君任欣旭杭俊张鹏宫璇
Owner ANHUI UNIVERSITY