Power Supply Voltage Prioritization for Redundant Systems
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Solution Overview
Problem
Existing redundant power supply systems with multiple power sources require complex configurations to prevent current flow between sources and prioritize power sources effectively, which complicates the setup and reliability of high-availability systems like communication devices.
Innovation Solution
A power supply system with a first and second power source, where the second power source includes a voltage controller to adapt its output voltage based on the operating mode of the first power source, ensuring the active power source has a higher output voltage than standby sources, thereby simplifying prioritization and preventing current flow between sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple power sources are connected to the same power input with complex measures to prevent current flow between sources, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent changes the voltage parameter of the power sources to resolve the contradiction. The active power source operates at a higher voltage level than the standby power source, which naturally prevents current flow from the active to the standby source. This parameter-based solution eliminates the need for complex isolation measures while maintaining reliability.
Solution Approach 2:
The patent applies equipotentiality by ensuring that the active power source maintains a higher potential (voltage) than the standby power source. This voltage differential creates a natural direction for current flow that prevents reverse current from entering the standby source, simplifying the system architecture.
2Reliability
If priority order is implemented among power sources, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent uses voltage level as a parameter to indicate priority status. The active power source operates at a higher voltage, and the standby at a lower voltage. This parameter-based indication makes the priority status immediately recognizable and simplifies the control logic for automatic failover operations.
Solution Approach 2:
The system implements self-service through automatic detection and failover. When the active power source fails, the system automatically detects the failure and switches to the standby source without requiring manual intervention, thereby maintaining ease of operation while ensuring reliability.
3Object-generated harmful factors
If voltage of standby power source is decreased, then current flow prevention is improved, but power delivery capability worsens
Solution Approach 1:
The patent changes the voltage parameter of the standby power source to a level lower than the active source to prevent reverse current flow. This parameter adjustment resolves the harmful current flow issue while the standby source maintains sufficient power delivery capability for its intended backup function.
Data Source
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AI summary
A power supply arrangement comprising at least two power sources is provided. The operation of the individual power sources is prioritized by adapting the voltage level of the output voltages provided by the individual power sources. In particular, the output voltages are set such that the output voltage of an active power source is higher than an output voltage of a standby power source. In this way, a control and prioritization of power supply with multiple power sources can be performed in very simple, efficient and reliable manner.