Microcontroller-based Resolver - Digital Converter

Revolver-to-Digital Converter is the angle-measured system that is extensively applied in servo systems. It is large quantitatively used in high-accuracy as well as large and medium-sized digital control systems, robot control systems, industrial control systems, weapon control systems and inertial navigation domain.But the larger size and higher power consumption of existing angle-measured systems influences the performance of measured systems, especially used in digital systems. The higher cost of the deviation compensation and error correction is another problem of existing angle-measured systems. This thesis studies micro-intelligent angle-measured systems to solve these problems.This paper introduces a kind of Revolver-to-Digital Converter, which is composed of analog circuit, microprocessor and serial interface. The three-path input signal is X = A sin θ cos ωt , Y = A cos θ cos ωt and Z = U cos ωt . The output signal is deflective angle θ by 16 bit digital quantities. Analog circuit is principally made up of phase rectifier circuit, square-ware generator and filtering circuit. It can transform the input alternating current signal into the direct current signal. Analog-to-digital converter which is in the microcomputer changes input analog signal into digital signal, which is convenient for handle and operate data in microprocessor. In microprocessor, the converted digital signals B sin 9 and B cos 9 convert to the digital signal 9 through the function of division and arc tangent.The reason about the measured error of Revolver-to-Digital Converter is found out, a fast and effective method about compensation is brought forward. It has gained the satisfactory effect in application.At last, the experimental data shows, the hardware and the software of Revolver-to-Digital Converter can relatively accurately complete above-mentioned signal conversion and data operation.