Precision test method for rotary transformer

Abstract

The invention discloses a precision test method for a rotary transformer, which comprises the following steps: constructing a reference angle observer, observing a motor angle in real time, taking the motor angle as a reference value for precision test, and comparing the reference value with a real-time measurement angle of the rotary transformer to obtain a precision test result of the rotary transformer. According to the invention, the cost can be reduced and the test performance can be improved without an external professional test device or an additional position detection device.

Description

technical field [0001] The invention relates to the field of rotary transformers, in particular to a precision testing method for rotary transformers. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of simple structure, flexible control and high power density, and is widely used in aerospace, biomedical, clean energy and other fields. The high-precision detection of PMSM rotor position is of great significance for the improvement of system control accuracy. At present, the position sensors commonly used in PMSM include: Hall, photoelectric encoder and resolver. Among them, the Hall element has the advantages of small size, low price and easy implementation when it is used to detect the rotor position, but the detection accuracy is greatly affected by the installation position accuracy and working environment and other factors; the photoelectric encoder has high detection accuracy, However, when used in the aerospace field, the pho...

AI Technical Summary

Problems solved by technology

However, during the actual use of the resolver, the accuracy of the resolver may change due to factors such as resolver structure looseness, stator and rotor offset, excitation signal distortion, and harmonic interference.

However, in the process of using the resolver after leaving the factory, how to test the accuracy of the resolver without external professional test devices or additional position detection devices, and how to improve test performance and reduce costs has become an urgent problem to be solved

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