Rotary transformer and rotating body equipped with same

Abstract

The invention provides a rotary transformer and a rotating body equipped with same, and belongs to the technical field of detection. The rotary transformer comprises a stator and a rotor, wherein the stator comprises a stator yoke and stator detection teeth, and the stator detection teeth are arranged on the stator yoke; the spanning angle of the stator yoke is smaller than 360 degrees; the rotor comprises a rotor iron core; rotor salient poles are arranged on the surface of the rotor iron core; the number of the stator detection teeth is 4*K, wherein K is a positive integer; the number of the rotor salient poles is N, wherein N is a positive integer; each stator detection tooth is at most wound with a coil; the rotary transformer comprises at least one set of detection coil system; each detection coil system comprises a plurality of coils wound around the stator detection teeth; inductance of the coils is changed along with changes of the rotating angles of the rotor; and the rotating body comprises a rotating body main body and the rotary transformer, wherein the rotary angle of the rotating body main body and the rotary transformer are in a regular relationship. The miniaturization and light weight of the rotary transformer are promoted; and in addition, winding and line connection are simpler and more effective.

Description

Technical field [0001] The invention belongs to the technical field of detection, and relates to a transformer and a rotating body, in particular a resolver and a rotating body. Background technique [0002] Industries such as electric vehicles, industrial automation, robotics, textile machinery, and aerospace are inseparable from the high-performance control of rotating electric machines, which require motor rotation angle sensors and often require them to be used in high-temperature environments. [0003] Currently, photoelectric angle encoders are widely used because they can easily detect the rotation angle of the motor. However, such photoelectric angle encoders contain optoelectronic components and semiconductor devices, so they cannot be used in high temperature environments. [0004] The resolver is a sensor that can detect the rotation angle. Because it does not use photoelectric conversion devices, it can be used in a higher temperature environment. However, the current re...

AI Technical Summary

Problems solved by technology

However, the current resolver has many disadvantages: the existing resolver has reached the limit of miniaturization and light weight, and it is difficult to break through the current bottleneck; the stator detection teeth are wound with multiple sets of windings, usually three sets of windings, The manufacturing process is very complicated, and the consistency of the resolver is adversely affected due to the different positions of the windings; since there are multiple sets of windings on the stator detection teeth, it is easy to appear between different windings due to vibration and shock during use. Problems such as short circuit and disconnection will lead to the failure of the resolver and reduce the reliability; the traditional resolver contains at least 6 lead wires, which not only increases the risk of failure of the connecting wires, but also makes the connection and debugging of the lead wires very cumbersome

However, in this method, because two or more sets of rotary transformers need to be installed on the rotating body, the axial length of the rotating body will be increased, the volume will become larger, and the cost will be greatly increased.

It can be seen that there is a problem of mutual constraints between the occupied volume and reliability of the resolver detection system in the prior art

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