DC Power Supply Control with Load-State Voltage Switching
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Solution Overview
Problem
Existing power supply systems with multiple loads require separate voltage conversion circuits and data tables, increasing costs due to the need for individual optimization, which is inefficient and costly.
Innovation Solution
A power supply system with a converter, detector, and controller that adjusts voltage based on load state and external commands, using a distribution voltage control mode to minimize power consumption and a fixed mode to stabilize voltage during sudden changes, reducing the need for multiple conversion circuits and data tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery is disposed of when its output capacity falls below 80% of initial capacity, then battery replacement frequency increases and reliability is maintained, but resource waste occurs and environmental burden increases
Solution Approach 1:
The patent applies multi-functionality by enabling batteries to serve different purposes based on their remaining capacity. High-capacity batteries continue to serve as primary power sources, while low-capacity batteries are repurposed for backup power or auxiliary functions, extending their useful life and preventing premature disposal.
Solution Approach 2:
The system dynamically changes operational parameters by adjusting which batteries are active, in standby, or retired based on real-time capacity assessment. This parameter-based management allows flexible reconfiguration of battery roles rather than binary replacement decisions, optimizing both reliability and resource utilization.
2Reliability
If batteries are managed independently without grouping, then management complexity is low, but power supply reliability decreases during battery failures
Solution Approach 1:
The patent segments the battery system into multiple groups based on capacity characteristics, with each group managed semi-independently. This segmentation allows localized failure management while maintaining overall system reliability, as failures in one group do not necessarily compromise other groups.
Solution Approach 2:
The control device acts as an intermediary that coordinates between multiple battery groups, managing power distribution and failure responses. This intermediary approach enables complex coordinated management while maintaining relatively simple individual group structures, balancing overall reliability with manageable complexity.
3Quantity of substance
If all batteries are used until failure, then resource utilization is maximized, but system availability and productivity decrease
Solution Approach 1:
The system performs preliminary actions by proactively managing battery retirement and replacement before complete failure occurs. By monitoring capacity degradation and pre-positioning replacement batteries or reconfiguring groups, the system maintains continuous power supply availability while optimizing overall resource utilization across the battery fleet.
Solution Approach 2:
The patent implements periodic assessment and reconfiguration of battery groups based on capacity degradation patterns. This periodic management approach allows systematic resource utilization optimization while maintaining power supply availability through planned transitions rather than reactive failures.
Data Source
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AI summary
A power supply system (1) is a DC power supply and distribution system that converts AC power received from a main power source (2) into DC power and supplies the DC power to a load (3). The power supply system (1) includes a power converter (10), a load state detector (20), and a controller (30). The power converter (10) converts AC power received from the main power source (2) into DC power with a voltage in accordance with a distribution voltage command value Vref and supplies the DC power to the load (3). The load state detector (20) detects an operating state of the load (3). The controller (30) operates in an operation mode selected from among a plurality of operation modes and generates the distribution voltage command value Vref. The operation modes include a distribution voltage control mode in which the distribution voltage command value Vref is generated based on load operating information detected by the load state detector (20) and a distribution voltage fixed mode in which a predetermined setting value or an external command value acquired from an external device (4) is set as the distribution voltage command value Vref.