A rotary transformer zero position tester

Abstract

The invention discloses a zero tester for a rotary transformer. The zero tester comprises a single-chip microcomputer, a nixie tube, a COS (chip operating system) signal acquisition circuit, an SIN signal acquisition circuit and a sine wave circuit. The sine wave circuit comprises an STC12C2054-chip and an AD7541-chip and generates 3.5KHz sine wave sent to an exciter signal receiving end of the rotary transformer. The COS signal acquisition circuit acquires signals of the rotary transformer and then the signals are sent to a analog switch CD4066 through an operational amplifier. The SIN signal acquisition circuit acquires signals of the rotary transformer and then the signals are sent to the single-chip microcomputer through the operational amplifier. The single-chip microcomputer controls the CD4066 analog switch and selects signals in a positive half period or negative half period, and then the signals are subjected to AD (analog-digital) sampling and are calculated to obtain angle value which is displayed on the nixie tube finally. With the zero tester, the angle of the rotary transformer can be debugged safely and quickly, production efficiency of motors can be increased, and debugging cost can be lowered. The angle value can be displayed through the four-bit nixie tube so that people can read the angle value directly. As the zero tester is small in size, people can carry the same conveniently when going out.

Description

technical field [0001] The invention relates to a rotary transformer zero position tester which can conveniently adjust the angle of the rotary transformer. Background technique [0002] Nowadays, many permanent magnet motors use a resolver as the feedback element. It is difficult to adjust the angle of the resolver. At present, there are methods such as observing the waveform with an oscilloscope and connecting the main phase with direct current. Accuracy, but this method requires the motor to rotate and the voltage of the normal operation of the motor is passed, so it is more dangerous to use and not suitable for mass production. Contents of the invention [0003] The purpose of the present invention is to provide a rotary transformer zero position tester which can conveniently adjust the angle of the rotary transformer in order to overcome the deficiencies of the prior art. [0004] In order to achieve the above object, the technical solution adopted in the present inv...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, many permanent magnet motors use a resolver as the feedback element. It is difficult to adjust the angle of the resolver. At present, there are methods such as observing the waveform with an oscilloscope and connecting the main phase with direct current. Accuracy, but this method requires the motor to rotate and the voltage of the normal operation of the motor is passed, so it is more dangerous to use and not suitable for mass production

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