Digital converter of rotary transformer and integrating circuit of digital converter

Abstract

The invention discloses a digital converter of a rotary transformer and an integrating circuit of the digital converter. The integrating circuit comprises a first resistor, a first component, a second component, a first changeover switch, a second changeover switch, a first operational amplifier and a gain adjustment operational amplifier. The integrating circuit is connected with a voltage-controlled oscillator; the voltage-controlled oscillator is connected with a 16 bit reversible counter; the forward-backward counter is connected with a solid control transformer; the solid control transformer is connected to the output end of the rotary transformer; a resolution control module is respectively connected with the solid control transformer and the forward-backward counter. According to the digital converter, the output velocity voltage can be quickly stabilized during resolution changeover, so that the error of module angle is decreased.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a rotary transformer digital converter and an integrating circuit thereof. Background technique [0002] The resolver digital resolver digital converter is used to convert the voltage signal output by the resolver that changes with the rotor angle into a digital signal to achieve accurate tracking of the analog angle. The integral circuit in the resolver-to-digital converter is used to convert the error voltage signal of the analog angle and the digital angle into a speed voltage, and the speed voltage is fed back through a loop to reduce the modulus angle error. [0003] A common integrating circuit is composed of resistors, capacitors, and operational amplifiers. The input voltage and resistors determine the charging and discharging current of the capacitor, thereby determining the rate of change of the output voltage. In the resolver-to-digital converter, different ...

AI Technical Summary

Problems solved by technology

In the resolver-to-digital converter, different resolutions correspond to different speed voltages. When the resolution is switched, the analog-to-digital angle error becomes larger. The speed voltage is adjusted by the integrating circuit. Due to the influence of the resistance and capacitance of the integrating circuit, the speed voltage reaches a stable value. The time is longer, and in the process, the error voltage of the modulus angle is also larger

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