Variable Flux Resolver

Abstract

The invention provides a variable magnetic flux rotary transformer, which includes a stator core, a winding and a rotor; an air gap space is formed between the stator core and the rotor, and the outer end surface of the rotor has a sinusoidal profile shape; the winding is wound on the stator core On the other hand, the winding can form an air-gap magnetic flux with a sinusoidal function state distribution in the air-gap space. The winding includes the winding lead-out end, the input excitation winding and the sine and cosine output signal winding. In the present invention, the rotor with a sinusoidal profile on the outer end surface is matched with the winding that can form a magnetic flux distributed in a sinusoidal manner in the air gap space, and the sinusoidal voltage signal output is realized through the variable magnetic flux; the rotor with a three-dimensional structure with a regular sinusoidal distribution The characteristics of simple structure and small design size help to reduce the weight and volume of the transformer, thereby helping to provide high reliability, ultra-light weight, and ultra-thin speed and position signal feedback components for the rotary drive system.

Description

technical field [0001] The present invention relates to the technical field of rotary transformer structure and principle design, in particular to a variable magnetic flux rotary transformer. Background technique [0002] At present, servo drive systems, electrification of aerospace drive systems, unmanned aerial vehicles and commercial satellites are being widely researched and promoted. The current position sensors widely used in the systems mainly use photoelectric encoders or brushless resolvers. In the former photoelectric encoder, because it has a code disc and electronic devices, its high temperature and low temperature resistance is not enough, and its vibration and shock resistance level is not high. Because it is not resistant to radiation, it cannot be used in outer space as a position feedback element. [0003] There is an existing Chinese patent with publication number CN206341110U, which discloses a rotary transformer and a rotating body having the rotary trans...

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Problems solved by technology

[0004] The inventor believes that the transformers in the prior art have large weight and volume, which limits their applicability in aerospace systems, and there is room for improvement

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