Digital and Analog Current Equalizing Device for Parallel Power Supplies
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Solution Overview
Problem
Existing power supply systems face challenges in implementing effective current equalization when both digital and analog power supplies are inserted in parallel, as existing solutions are limited to either analog or digital current equalization, preventing uniform current distribution and stress management across modules.
Innovation Solution
A digital current equalizer and an analog current equalizer are introduced, each comprising an output-current sampling-and-amplifying module, a processing module, and a primary power converting module, which adjust output voltage references to achieve current equalization, allowing for simultaneous operation with both digital and analog power supplies by using a current equalizing bus and controlling modules to manage voltage adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both digital and analog power supplies are inserted in parallel, then system flexibility and transition are enabled, but effective current equalization cannot be implemented
Solution Approach 1:
The patent implements a feedback mechanism where the current equalization controller continuously monitors the output currents of both digital and analog power supplies. Based on this feedback, the controller adjusts the output of each module to maintain uniform current distribution, with the conversion circuit ensuring that both module types respond to the same control signals
Solution Approach 2:
The current equalization conversion circuit acts as a mediator that enables the control system to treat digital and analog power supplies uniformly. By converting control and feedback signals between digital and analog domains, it allows the feedback loop to effectively manage current distribution across heterogeneous power supply modules
Data Source
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AI summary
Provided are a digital current equalizing device, an analog current equalizing device, a current equalizing method and a system. The digital current equalizing device comprises: an output current sampling amplifying module (102), a digital processing module (104), and a main power frequency conversion module (106). An input terminal of the output current sampling amplifying module (102) connects to an output loop of a power supply, and an output terminal of the output current sampling amplifying module (102) connects to a current equalizing bus through a resistor R0, wherein the digital processing module (104) is configured to adjust an output voltage reference signal Vr according to a difference between an output voltage signal V2 of the output current sampling amplifying module (102) and an voltage signal Vbus of the current equalizing bus, and the main power frequency conversion module (106) is controlled to adjust the voltage according to the adjusted output voltage reference signal Vr'. The technical solution is easy to implement and can improve the reliabilities of each power supply module and the whole power supply system.