Load-sharing Power System With Adaptive Sub Supply Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing load-sharing power systems require built-in and external power supplies to have identical load-sharing functions, limiting their availability and increasing manufacturing costs, especially in space-constrained electronic devices.
Innovation Solution
A load-sharing power system that includes a main power supply, a sub power supply assembly, a boost circuit, and a power comparing circuit, allowing for adaptive power adjustment between the main and sub power supplies without requiring the main power supply to have load-sharing capabilities, enabling the use of power supplies of different specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main power supply is required to have load-sharing function, then the power distribution reliability is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent divides the load-sharing control function into two parts: the sub power supply performs load-sharing control by comparing its output with the main power supply output, while the main power supply only needs to provide power without complex control functions. This segmentation allows the main power supply to be simpler and cheaper while maintaining system reliability.
Solution Approach 2:
The patent introduces a voltage servo circuit as an intermediary that compares the main power supply output voltage with a reference voltage and adjusts the sub power supply accordingly. This mediator enables load-sharing functionality without requiring the main power supply itself to have complex control capabilities, thus reducing its cost and complexity.
2Adaptability or versatility
If the main power supply is required to have load-sharing function, then the power distribution flexibility is improved, but the device complexity increases
Solution Approach 1:
The control functionality is segmented and placed in the sub power supply unit, which includes the voltage servo circuit and comparison logic. The main power supply remains a simple power source without control complexity, achieving flexibility through the sub unit's adaptive control capabilities.
Solution Approach 2:
The sub power supply performs self-adjustment by comparing its output voltage with the main power supply output through the voltage servo circuit and automatically regulating its own output to maintain proper load-sharing, eliminating the need for complex external control systems.
3Ease of manufacture
If power supplies of different specifications are used, then the manufacturing cost is reduced, but the power distribution control difficulty increases
Solution Approach 1:
The voltage servo circuit acts as an intermediary that handles the complexity of coordinating different power supply specifications. It compares voltages and generates appropriate control signals, abstracting away the differences between main and sub power supply specifications and simplifying the overall control approach.
Solution Approach 2:
The system dynamically adjusts the sub power supply output parameters (voltage and current) based on real-time comparison with the main power supply through the voltage servo circuit, enabling adaptive control that accommodates different power supply specifications without requiring complex manual configuration or matching.
Data Source
AI summary
A main power load signal and a main voltage reference signal correlated to a main power signal. A sub power load signal and a sub voltage reference signal correlated to a sub power signal. A reference voltage is provided and a boost voltage is determined according to a control signal. The main voltage reference signal and the sub voltage reference signal are compared, and when the first comparison result complies with a predetermined condition, a difference between the main voltage reference signal and the sub voltage reference signal is obtained to be further compared with the reference voltage. Then the control signal is determined. The main power load signal and the sub power load signal are compared, and then one of the sub voltage reference signal and the boost voltage is selected as a power source voltage of the sub power control circuit or the load sharing control circuit to generate an adjustment signal for determining current and voltage of the sub power signal.