Thermal Sensor in Electrical Adapter Connector

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Solution Overview

Problem

Conventional electrical adapter assemblies can cause cable overheating and damage due to excessive electrical power input, posing a risk to users.

Innovation Solution

An electrical adapter assembly with a thermal sensor in the connector that monitors temperature and automatically cuts off current when it exceeds safe levels, preventing overheating and damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the adapter accepts high power electricity (200W) input, then the power transmission capability is improved, but the cable may be overheated and damaged

Engineering Contradiction:
Improvepower transmission capabilityVSAvoidcable overheating
Core Design Contradiction:
PowerVSObject-affected harmful factors

Solution Approach 1:

The patent installs a thermal sensor in the connector before the cable connection is made. This sensor proactively monitors temperature at the critical heating point (connector-cable interface) before overheating can cause damage. The system takes preliminary protective action by detecting temperature rise early in the heating process, allowing preventive current cutoff before the cable reaches dangerous temperatures.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements a feedback control system where the thermal sensor continuously monitors temperature and sends signals to the circuit board. When the sensor detects temperature exceeding a predetermined threshold, it triggers the circuit board to automatically cutoff the electrical current. This closed-loop feedback mechanism ensures the system responds dynamically to temperature conditions, maintaining safety while allowing high power operation within safe temperature limits.

Inventive Principle:
Principle #23Feedback

2Device complexity

If the cable is used without temperature monitoring, then the device complexity is reduced, but the reliability and user safety deteriorate

Engineering Contradiction:
Improvedevice simplicityVSAvoiduser safety
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent introduces a thermal sensor as an intermediary component between the electrical circuit and the cable connection point. This sensor acts as a mediator that indirectly monitors the thermal condition of the cable without requiring complex instrumentation throughout the cable assembly. By placing the sensor at the critical connector interface, the system achieves reliable temperature monitoring with minimal added complexity, maintaining simplicity while significantly improving safety.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Effectively prevents cable damage and user injury by ensuring safe temperature levels during electrical power transmission, enhancing safety and reliability.

Implementation Method 1

The connector further has an outer surface, a positive electrode, a negative electrode and a thermal sensor. The thermal sensor is mounted in the inner space of the connector. Because the thermal sensor can sense the temperature in the connector and cut off the current when the temperature is too high

Methodology Applied
Scientific EffectThermal sensing: Thermistor

Data Source

PatentUS7258580B1Electrical adapter assembly
Publication Date: 2007.08.21 CYBER POWER SYST
  • US7258580B1 patent drawing
  • US7258580B1 patent drawing
  • US7258580B1 patent drawing

AI summary

An electrical adapter assembly has a cable and an adapter. The cable has a distal end having a plug and a proximal end having a connector. The connector comprises a shell having an inner space, a first end and a second end having an output hole allowing the cable to be mounted in the inner space. The second end of the connector has an outer surface, a positive electrode, a negative electrode and a thermal sensor mounted in the inner space of the connector. The adapter connects to the cable and has a circuit board and a socket corresponding to the plug. Because the thermal sensor can sense the temperature in the connector and cut off the current when the temperature is too high, the cable will not be damaged and users will not be in danger.