DC/AC Adapter Assembly Power-Overload Protection Circuit

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Solution Overview

Problem

Conventional DC/AC adapter assemblies often experience power-overloading when using higher voltage inputs, leading to potential damage to the cable and risk of injury to users due to excessive current flow.

Innovation Solution

Incorporation of a controller circuit within the DC/AC adapter that detects power-overloading signals from the cable and adjusts the output alternating current to prevent overloading by reducing the input direct current.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the DC/AC adapter is configured to receive 200-watts of electricity, then the electrical power capacity is improved, but the cable may become damaged or users may become injured due to power overloading

Engineering Contradiction:

Improveelectrical power capacityVSAvoidpower overloading damage

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The detector contact is pre-configured to detect power-overloading signals before damage occurs. The controller circuit is pre-programmed with overload thresholds and response protocols, enabling it to take preventive action by reducing input current before the cable or components are damaged, rather than waiting for failure conditions to manifest

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A feedback loop is established where the detector contact continuously monitors the cable's power load status and transmits signals to the controller circuit. The controller circuit adjusts the input current based on this real-time feedback, dynamically reducing power when overload conditions are detected and maintaining full power when conditions are safe, thus resolving the contradiction between high power capacity and overload prevention

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7632152B2DC/AC adapter assembly with a power-overload protection circuit

Publication Date: 2009.12.15 CYBER POWER SYST

AI summary

A DC/AC adapter assembly has a DC/AC adapter and a cable. The cable transmits a power-overloading signal to the DC/AC adapter indicating whether power-overloading is occurring in the cable. The DC/AC adapter includes a controller circuit for controlling and adjusting an output alternating current of the DC/AC adapter based on the power-overloading signal to reduce power-overloading occurring in the cable.