A parallel current adding system and a control method thereof

By combining analog and digital parallel operation methods and using digital potentiometer calibration and adjustment, the hardware circuit of the parallel current summing system is simplified, high-precision current value control is achieved, and the problems of hardware complexity and time delay in the prior art are solved.

CN119510858BActive Publication Date: 2025-12-26HEFEI KEWELL POWER SYST CO LTD
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Patent Information

Application Number
CN202411628539.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-14
Publication Date
2025-12-26
Estimated Expiration
2044-11-14

AI Technical Summary

Technical Problem

Existing parallel current summing systems have complex hardware circuits and cumbersome control when multiple machines are connected in parallel, and it is difficult to achieve real-time data acquisition. Analog parallel mode affects accuracy, while digital parallel mode has time delay.

Method used

By combining analog and digital parallel operation, and using digital potentiometers for calibration and adjustment, the hardware circuit is simplified, and digital potentiometers replace traditional resistor proportional circuits to achieve precise control.

Benefits of technology

It achieves simple hardware circuitry and high precision in parallel current summation. The digital potentiometer can accurately adjust the current value when multiple devices are connected in parallel, avoiding the problems of circuit complexity and time delay in traditional methods.

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Abstract

A kind of parallel machine current adding system belongs to the technical field of electronic equipment for measurement and testing, solve how to design a kind of hardware circuit simple, control precision high parallel machine current adding and system problem;The parallel machine current adding and system of the present application, comprising: multiple single machine current sampling circuits, parallel machine current adding and circuit;Single machine current sampling circuit includes: first differential amplifier circuit, first proportional regulating circuit, first unit inverter circuit, first digital potentiometer;Parallel machine current adding and circuit includes: instrument amplifier circuit, second proportional regulating circuit, second unit inverter circuit, second digital potentiometer and multiple proportional input end resistance;Digital potentiometer is applied to parallel machine circuit, and the resistance value of potentiometer is assigned by the number of parallel machine table set to realize the adjustment of amplification factor, replace the single proportional resistance resistance value of traditional resistance proportional circuit to realize the adjustment of amplification factor, hardware circuit is simple, amplification factor control is accurate.
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