Power Supply Device AC Power Limiting Controller
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Solution Overview
Problem
Existing power supply devices face challenges in easily adjusting the amount of power supplied from commercial power sources to a preset level, affecting system power usage efficiency.
Innovation Solution
A power supply device comprising a first input terminal for AC power, a first power converter, a second input terminal for an electric power generator, a second power converter, a storage battery, and a controller that ensures the AC power from the system does not exceed an upper limit value, allowing for flexible power distribution and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If charge and discharge amounts with respect to the power storage device are adjusted to set the amount of power supplied from commercial power supply to a preset power amount, then the power distribution can be optimized, but it is not easy to set the amount of power supplied from the commercial power supply to a preset power amount
Solution Approach 1:
The patent changes the control parameter from adjusting charge/discharge amounts of the storage battery to directly controlling the power converter that supplies power from the commercial power supply. The controller adjusts the power converter's output based on the difference between the preset power amount and the actual power amount, making it easier to set and control the commercial power supply amount without complex battery charge/discharge management.
2Productivity
If the amount of power supplied from commercial power supply is controlled to a preset power amount, then system power usage can be optimized, but the control complexity increases when managing multiple power sources
Solution Approach 1:
The patent merges the control of multiple power sources (commercial power supply and solar power generator) into a single unified control system. The controller manages both power converters and the storage battery together, calculating the required commercial power amount based on load requirements and solar power availability, thereby simplifying the overall control architecture while maintaining efficient power usage across all sources.
Solution Approach 2:
The patent implements a feedback control mechanism where the controller continuously monitors the actual power amount supplied from the commercial power supply and compares it with the preset power amount. Based on this feedback, the controller adjusts the power converter's operation to eliminate the difference, ensuring accurate power control while automating the management complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy adjustment of system power usage, optimizing power distribution between commercial power sources, generators, and storage batteries, ensuring efficient power supply to loads.
Implementation Method 1
a first power converter configured to convert AC power supplied via the first input terminal into DC power
Implementation Method 2
a second power converter configured to convert power supplied via the second input terminal into DC power
Data Source
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AI summary
A power supply device comprising: a first input terminal configured to be supplied AC power from a system; a first power converter configured to convert AC power supplied via the first input terminal into DC power; a second input terminal configured to be supplied power from an electric power generator; a second power converter configured to convert power supplied via the second input terminal into DC power; a storage battery; a connection bus connected to an output side of the first power converter, an output side of the second power converter, and the storage battery; an output terminal configured to output some of DC power obtained via the connection bus; and a controller configured to control the first power converter such that the amount of AC power supplied from the system does not exceed an upper limit value.