Parallel Power Supply System Load Balancing Control
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Solution Overview
Problem
Conventional power supply systems with multiple power supply devices face issues of unequal output power distribution leading to reduced lifespan and reliability of the device with higher maximum power, and are limited by safety regulations, restricting total output power beyond certain voltage levels.
Innovation Solution
A power supply system with a control device that adjusts the output power of the power supply devices with the highest maximum power to match that of others, ensuring equal or similar output powers while adhering to safety regulations, using a control device to send adjusting signals based on input voltage and maximum power information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple power supply devices with different maximum powers are connected in parallel to raise total output power, then the total output power is improved, but the useful life of high-power devices is reduced due to unequal output power distribution
Solution Approach 1:
The patent applies local quality by adjusting the output power of each power supply device according to its specific maximum power capacity. The control device distributes power locally to each device based on its individual characteristics, ensuring that high-power devices do not always bear greater loads, thereby extending their useful life while maintaining total system power output.
Solution Approach 2:
The patent changes the operating parameters of power supply devices dynamically. The control device monitors the maximum power of each device and adjusts their output power ratios accordingly. By changing the output power parameter distribution rather than maintaining equal proportions, the system extends device lifespan while preserving total power capability.
2Reliability
If safety regulations limit output power at low input voltage, then device safety is improved, but total output power capability is reduced
Solution Approach 1:
The patent applies dynamics by making the output power limit adaptive rather than static. The control device dynamically adjusts the output power of each power supply device based on real-time input voltage conditions. When input voltage is low, the system automatically applies safety limits; when input voltage is normal, the system removes restrictions, thereby maintaining both safety compliance and maximum power capability.
Solution Approach 2:
The patent uses feedback mechanisms where the control device continuously monitors input voltage levels and adjusts output power limits accordingly. The system receives feedback about voltage conditions and automatically modifies power output restrictions to ensure safety compliance while maximizing power delivery when conditions permit.
Data Source
AI summary
A power supply system is adapted to supply a power to a load, is connected to a load sharing bus, and includes two power supply devices and a control device. The two power supply devices are connected in parallel to the load, respectively have a maximum power, and respectively output an output power to the load. The control device is electrically connected to the two power supply devices. When a controlling condition is met, one of the two power supply devices with the greatest maximum power adjusts the output power according to a controlling signal from the control device and a sharing signal from the load sharing bus, so that the two output powers of the two power supply devices are the same or similar.