Interface Cable Power Supply via Resistance Identification
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Solution Overview
Problem
Existing power supply methods through interface cables face issues such as insufficient power delivery and increased heating due to voltage drops, and embedding circuits or chips in plugs to identify current levels increases plug size and cost.
Innovation Solution
Electronic equipment with receptacles having multiple electric terminal sets, including a power terminal, a detection terminal, and a grounding terminal, which includes a cable identification section to determine the interface cable configuration and a power supply section to adjust power delivery accordingly, allowing for efficient power supply to external equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a circuit or chip is embedded in the plug to identify current levels, then power supply capability is improved, but plug size and cost increase
Solution Approach 1:
The invention extracts the cable identification function from the plug and relocates it to the cable itself through resistance value identification. By measuring the resistance of the interface cable directly, the system determines cable specifications without requiring any identification circuits or chips in the plug, thus maintaining simple plug structure while achieving accurate power supply capability
Solution Approach 2:
The invention replaces the mechanical/electronic identification system (circuits or chips in plugs) with an electrical measurement system. By using resistance measurement to identify cable specifications, the system substitutes complex hardware identification with a simple electrical property measurement, reducing device complexity while maintaining power supply capability
2Power
If high current flows through the interface cable, then power supply to external equipment is improved, but voltage drop and heating increase
Solution Approach 1:
The invention performs preliminary identification of cable specifications through resistance measurement before power supply begins. By determining the cable's current carrying capacity in advance, the system can pre-calculate the maximum safe power level, preventing excessive current flow that would cause voltage drop and heating issues
Solution Approach 2:
The invention implements dynamic power supply adjustment based on identified cable characteristics. The power supply level is not fixed but adapts to the specific cable configuration, allowing the system to optimize power delivery within safe limits determined by cable resistance and specifications
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 solution enables effective power supply to external equipment based on the interface cable configuration, preventing voltage drop-related issues and reducing costs by eliminating the need for embedded circuits or chips in plugs.
Implementation Method 1
cable identification section that identifies a configuration of an interface cable connected to the receptacle on the basis of signals acquired from the second electric terminals
Data Source
AI summary
It is intended to achieve excellent supply of power to connection destination equipment. Electronic equipment includes a receptacle having a plurality of electric terminal sets. The electric terminal sets each include a first electric terminal for power, a second electric terminal for detection, and a third electric terminal for grounding. A configuration of an interface cable connected to the receptacle is identified on the basis of signals acquired from the second electric terminals of the plurality of electric terminal sets. Power is supplied to external equipment through the first electric terminals of some or all of the plurality of electric terminal sets in accordance with the identified cable configuration.