DC/DC Converter Switching Control for Multi-Source Power Supply
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Solution Overview
Problem
Conventional off-grid power supply systems face high introduction and replacement costs due to large-scale DC/DC converters, and existing technologies do not effectively manage power supply source switching based on demand, leading to inefficient power distribution and potential system instability.
Innovation Solution
A control device that manages the connection state between multiple power supply sources and DC/DC converters by detecting power demand, selecting DC/DC converters based on usage conditions such as accumulated power generation time, and adjusting their connection state to ensure stable and efficient power supply, reducing the frequency of failures and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated DC/DC converter is provided for each power supply source with scale corresponding to maximum output, then the power supply capability is sufficient, but the introduction cost and replacement cost increase significantly
Solution Approach 1:
The patent applies universality by making DC/DC converters interchangeable across different power supply sources. Instead of dedicating specific converters to specific sources, any converter can serve any source based on current demands. This is achieved through a control device that manages connection states between power supply sources and converters dynamically, allowing one converter to handle multiple sources sequentially, thereby reducing the total number of converters needed and lowering costs.
Solution Approach 2:
The patent implements dynamics by enabling flexible, real-time reconfiguration of the power supply system. The control device dynamically changes connection states between power supply sources and DC/DC converters based on current power demands and converter usage conditions. This dynamic allocation allows the system to adapt to varying loads and converter availability, optimizing resource utilization without requiring oversized dedicated converters for each source.
2Power
If multiple DC/DC converters are connected in parallel to a power amplifier, then the power supply capacity increases, but the complexity of managing which converters to operate increases
Solution Approach 1:
The patent applies feedback by implementing a control device that continuously monitors the usage conditions of DC/DC converters and adjusts connection states accordingly. The control device receives information about converter operation status, power supply source status, and power demands, then automatically determines optimal connection configurations. This feedback mechanism simplifies management by automating the decision-making process for which converters to operate, eliminating the need for complex manual coordination.
Solution Approach 2:
The patent implements self-service by enabling the power supply system to automatically manage its own configuration without external intervention. The control device autonomously monitors converter usage conditions and power demands, then automatically reconfigures connections between power supply sources and converters as needed. This self-managing capability reduces operational complexity and allows the system to optimize its own performance based on real-time conditions.
3Adaptability or versatility
If DC/DC converters are frequently switched based on power demand, then the system adapts to varying loads, but the frequency of failures increases due to wear and tear
Solution Approach 1:
The patent applies preliminary action by proactively managing converter connection states based on usage conditions before failures occur. The control device monitors accumulated usage time and operational status of each converter, and preemptively rotates which converters are active based on their usage history. This preliminary management of converter utilization distributes wear more evenly across all converters, preventing any single converter from experiencing excessive stress that would lead to frequent failures.
Solution Approach 2:
The patent implements periodic action by systematically rotating which DC/DC converters are connected to power supply sources based on their usage conditions. Instead of continuously switching converters in response to every load change, the system employs periodic rotation schedules that consider accumulated usage time and operational status. This periodic rotation approach maintains load adaptation capability while reducing the frequency of individual converter switching events, thereby minimizing wear and tear and failure rates.
Data Source
AI summary
A device changes a connection state between a plurality of types of power supply sources and a plurality of DC/DC converters. The device specifies switching an operating power supply source, detects excess or insufficiency of power supply, acquires a usage condition of each of the plurality of DC/DC converters, selects at least one DC/DC converter for switching a connection state based on the usage condition and changes the connection state. The device selects a DC/DC converter having the longest accumulated power generation time as at least one DC/DC converter to be disconnected upon specifying that the operating power supply source is switched or detecting that the power supply is excessive, and changes the connection state between the plurality of types of power supply sources and the plurality of DC/DC converters upon switching the operating power supply source.