Power Source Relay Channel Switching for Load Balance
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Solution Overview
Problem
Dual-input power sources often result in resource wastage due to constant default channel operation, leading to increased risk of relay damage from ignition and arc discharge, and reduced service life due to imbalanced load distribution.
Innovation Solution
A control method that detects electric power quality and relay resistance across multiple channels, adjusts the power source to switch channels based on threshold conditions, ensuring balanced load distribution and reducing relay stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power source always works at the default channel, then the power supply stability is maintained, but the backup channel remains idle for the entire life cycle, resulting in huge waste of device resources
Solution Approach 1:
The system dynamically switches between default and backup channels based on relay resistance detection. The power source transitions from a static default-channel configuration to a dynamic load-balancing mode where the working channel is determined by real-time relay conditions, thereby activating the backup channel and reducing resource waste
Solution Approach 2:
The control method implements periodic detection of relay resistance at predetermined intervals. This periodic monitoring enables the system to assess relay health status and switch channels proactively before failure occurs, ensuring continuous operation while distributing wear between multiple channels
2Adaptability or versatility
If the relay is electrified to attract and open frequently, then the power source can switch channels, but ignition and arc discharge are generated causing great damage and increasing contact impedance
Solution Approach 1:
The system performs preliminary detection of relay resistance at predetermined intervals before actual channel switching is needed. By detecting relay degradation early and proactively switching channels based on resistance thresholds, the system avoids frequent emergency switching and reduces the number of relay operations required
Solution Approach 2:
The control method implements feedback control by continuously monitoring relay resistance and using this information to determine when channel switching should occur. The switching decision is based on measured resistance values compared against thresholds, creating a closed-loop system that minimizes unnecessary switching operations
3Productivity
If the relay contact impedance increases due to long-term attraction and opening, then the relay may be burnt due to heating, but the power source needs to maintain load balance
Solution Approach 1:
The system performs preliminary detection of relay resistance at predetermined intervals to identify degradation trends before they lead to failure. By detecting increased impedance early and switching channels proactively, the system prevents the relay from operating in a high-impedance state that would cause excessive heating and damage
Solution Approach 2:
The system uses the measured relay resistance value, which indicates degradation and potential harm, as a useful metric for making intelligent switching decisions. By converting the harmful effect of relay wear into a detectable signal (increased resistance), the system can proactively manage relay usage and extend overall system life
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
This approach maintains load balance across multiple channels, prolongs the service life of power sources, and enhances system stability by periodically switching to alternative channels, thereby reducing the risk of relay damage and improving hardware utilization.
Implementation Method 1
ignition and arc discharge can be generated when the relay is electrified to attract and open
Implementation Method 2
contact impedance of a relay contact can be increased when the relay is attracted and opened for a long time, and if the impedance is high, the relay is burnt due to heating
Data Source
AI summary
A control method for a power source, including the following steps: detecting the electric power quality of multiple channels of inputs of a power source; in response to the electric power quality of the multiple channels of inputs being normal, acquiring and comparing the resistance of a relay when the power source is respectively working at each channel of input; in response to the resistance of the relay at each channel of input meeting a preset condition, acquiring the duration how long each power source is working at one channel of input among the multiple channels of inputs; and in response to the duration how long the power source is working at the channel of input in the multiple channels of inputs being greater than a threshold value, adjusting the power source to work at other channel of input.