Integrated Electronic Switch Protection Profile for Overcurrent Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic switches lack effective self-protection mechanisms against excessive current, relying on external microcontrollers or devices for fuse functions, which can lead to inefficiencies and potential failures.
Innovation Solution
An integrated apparatus comprising an electronic switch, a drive unit, a diagnosis unit, and a memory that determines current and temperature to drive the switch based on a protection profile, enabling self-protection without external devices, with a built-in fuse function that can be reset and calibrated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external microcontrollers or devices are used for fuse functions, then protection capability is provided, but device complexity increases and reliability decreases
Solution Approach 1:
The patent merges the electronic switch and fuse functions into a single integrated apparatus. The drive unit incorporates both the switching capability and the diagnostic/protection logic, eliminating the need for separate external microcontrollers or fuse devices. This integration reduces component count and interconnection complexity while maintaining comprehensive protection capability through unified control of switching and protection functions.
Solution Approach 2:
The drive unit is designed as a multi-functional component that simultaneously performs electronic switching, current diagnostics, temperature monitoring, and protection decision-making. This universal component replaces multiple specialized devices (switch, microcontroller, temperature sensor, fuse) with a single apparatus that executes diverse functions through integrated circuitry and stored protection profiles.
2Reliability
If larger cable cross-sections are used for protection, then safety against excessive current is improved, but weight and cost increase
Solution Approach 1:
The apparatus provides self-service protection by continuously monitoring its own operating conditions through the diagnosis unit. The integrated system automatically detects excessive current and temperature conditions, compares them against stored protection profiles, and executes protective switching without requiring oversized passive protection elements. This active self-monitoring enables the use of optimally sized cables rather than conservatively oversized ones.
Solution Approach 2:
The patent replaces passive mechanical/physical protection (oversized cables acting as thermal mass) with active electronic protection (integrated monitoring and control circuitry). Instead of relying on the thermal inertia of large cable cross-sections to prevent overheating, the system uses electronic sensing and rapid switching to prevent dangerous conditions before they develop, enabling lighter cable specifications.
3Use of energy by moving object
If stand-by modes with low current consumption are used, then energy efficiency is improved, but protection monitoring capability may be reduced
Solution Approach 1:
The diagnosis unit operates periodically rather than continuously during stand-by modes, monitoring current and temperature at intervals sufficient to detect abnormal conditions while minimizing power consumption. The system can transition between active monitoring and low-power states, maintaining protection capability through periodic checks rather than continuous measurement, thus achieving energy efficiency without sacrificing essential safety monitoring.
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
The apparatus provides efficient self-protection for electronic switches and connected lines, reducing cable costs and weight by allowing smaller cross-sections, while ensuring reliable operation and low current consumption, even in standby modes.
Implementation Method 1
the diagnosis unit determines the current through the electronic switch on the basis of a voltage measurement, e.g. a voltage drop across a drain-source path of a MOSFET or a collector-emitter path of a transistor
Implementation Method 2
the temperature is determined by means of a temperature sensor arranged in proximity to the electronic switch. The temperature sensor can be e.g. a pn junction or a temperature-sensitive resistor
Data Source
AI summary
An apparatus includes an electronic switch, a drive unit for driving the electronic switch, a diagnosis unit for determining a current through the electronic switch, a memory for storing a protection profile. The drive unit is configured such that the electronic switch is driven on the basis of the current through the electronic switch determined by the diagnosis unit and on the basis of the protection profile. Furthermore, a method is specified for driving an electronic switch.