Power Control System Current Balancing via Segmentation
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Solution Overview
Problem
Existing power control systems face challenges in efficiently modulating output voltages due to high design complexity and cost in switching circuits, and low efficiency leading to overheating issues in linear power circuits, which complicates precise power sharing among elements.
Innovation Solution
A power control system comprising a first voltage control circuit with a current control switch, sensing unit, and comparison circuit, and multiple balancing circuits with similar components to precisely control and balance output currents, reducing overheating and costs by ensuring equal power sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If switching circuits are used for modulating output voltage, then transformation efficiency is improved, but design complexity and cost increase
Solution Approach 1:
The power control system is divided into multiple independent voltage control circuits (first voltage control circuit, second voltage control circuit, etc.), each with its own current control switch, current sensing unit, and comparison circuit. This segmentation allows each circuit to operate independently with simplified design while collectively achieving high efficiency through parallel operation and current balancing.
2Ease of manufacture
If linear power circuits are used for modulating output voltage, then design simplicity is improved, but transformation efficiency deteriorates causing overheating
Solution Approach 1:
The system divides the power control function into multiple linear voltage control circuits operating in parallel. Each circuit uses simple linear regulation elements, maintaining design simplicity while the collective parallel operation reduces the power handling burden on each individual element, improving overall efficiency and reducing heat generation per element.
Solution Approach 2:
The system dynamically balances the output currents among multiple voltage control circuits using comparison circuits that continuously monitor and adjust current distribution. This dynamic current balancing allows linear circuits to operate more efficiently by preventing any single element from being overloaded, thereby reducing overheating while maintaining design simplicity.
3Temperature
If multiple elements are connected in parallel or series to share output power, then overheating is reduced, but precise power sharing control becomes difficult
Solution Approach 1:
Each voltage control circuit incorporates a current sensing unit that provides feedback on the output current. The comparison circuits use this feedback information to continuously adjust and balance the current distribution among parallel elements. This feedback mechanism enables precise control of power sharing while keeping each element within safe thermal limits, resolving both the overheating and precision control issues.
Data Source
AI summary
A power control system includes a voltage control circuit and a plurality of balance circuits. The voltage control circuit controls a voltage level at an output of the power control system according to a reference voltage. Each of the plurality of balancing circuits outputs a current, whose magnitude is a specific ratio to an output current outputted from the voltage control circuit. The power control system is capable of balancing output currents of the voltage control circuit and the plurality of balance circuits in order to share output load of the power control system.