Circuit for simulating rotary transformer

Abstract

The invention discloses a circuit for simulating a rotary transformer, and the circuit comprises an isolation transformer and a continuously adjustable attenuation circuit, a primary coil of the isolation transformer is used as the input of the whole circuit, a secondary coil of the isolation transformer is connected with the input of the continuously adjustable attenuation circuit, and an attenuation end of the continuously adjustable attenuation circuit is used as the output of the whole circuit. An excitation signal is input to a primary coil of the isolation transformer after passing through the matched resistor, an unattenuated intermediate signal is generated in a secondary coil through isolation transformation of the transformer, and the continuous adjustable attenuation circuit is formed by connecting multiple stages of attenuation circuits with different attenuation coefficients in series. When the excitation and conversion circuit of the rotary transformer is tested and verified, the requirement for the entity of the rotary transformer is thoroughly eliminated, moving parts are eliminated, and the system development and maintenance difficulty is reduced.

Description

technical field [0001] The invention belongs to the technology related to computer automatic testing, in particular to a circuit for simulating a rotary transformer. Background technique [0002] In the field of industrial control, the resolver is an important non-contact sensor. A resolver consists of an iron core, an armature, a primary coil, and a secondary coil. The primary coil generates a periodic magnetic field under the excitation of the AC signal of the drive circuit, and the secondary coil induces an output AC signal under the excitation of the alternating magnetic field; when the armature (rotating part) is displaced, the magnetic flux of the resolver core changes, and the secondary coil The output AC signal changes accordingly; the post-stage acquisition circuit can obtain the displacement or rotation angle of the armature through conversion. [0003] The resolver (angular displacement sensor, solenoid valve, etc.) is an important test and control object of a s...

AI Technical Summary

Problems solved by technology

[0012] Some resolvers are customized parts, which are expensive and expensive to use in large quantities;

[0013] It is very difficult to develop an automatic test system based on physical objects

Images