Integrated Circuit Coil Current Change Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Standard current sensors in power electronic applications have limited measuring ranges, making them unsuitable for detecting high-value overcurrent events, which can lead to switch damage, and require alternative detection methods to prevent damage during transient events like slipping or electrical surges.
Innovation Solution
Incorporating a coil-based measurement system within integrated circuits to detect current changes through electromagnetic induction, allowing for the determination of current changes and enabling controlled switching of electronic switches like MOSFETs, and using coils for temperature measurement to prevent damage during overcurrent events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard current sensors are used, then measurement precision is maintained within normal operating range, but measuring range is limited and cannot detect high-value overcurrents
Solution Approach 1:
The patent segments the current measurement function into two distinct sensing mechanisms: a first current sensor for normal operating range measurement and a second current sensor (coil-based) for overcurrent detection. This segmentation allows each sensor to be optimized for its specific range, resolving the contradiction between precision and measuring range.
Solution Approach 2:
The integrated circuit is designed with multi-functionality by incorporating both a standard current sensor and a coil-based current sensor, enabling it to handle both normal current measurement and overcurrent detection within a single system. This universal design resolves the limitation of standard sensors having restricted measuring ranges.
2Adaptability or versatility
If coil-based measurement means are used, then measuring range is extended to detect high-value overcurrents, but device complexity increases
Solution Approach 1:
The patent merges the coil-based current sensor directly into the integrated circuit structure, combining multiple functions (normal current sensing, overcurrent detection, and processing) into a single integrated device. This integration reduces the overall system complexity compared to using separate external components.
Solution Approach 2:
The coil-based current sensor is designed to be self-sufficient for overcurrent detection, generating its own measurement signal without requiring additional external sensing components. This self-service capability simplifies the overall measurement system while extending the measuring range.
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
Enables loss-optimized control of electronic switches and prevents damage by detecting current changes and temperature variations, allowing for timely switching and reducing the risk of switch failure during high-value overcurrent events.
Implementation Method 1
the coil is preferably open so that a voltage can be determined at the end of the coil; such voltage may be based on electromagnetic induction. The current flowing through a portion of the integrated circuit in the vicinity of the coil changes the magnetic field; this change can be detected by said coil, which provides a voltage based on change of the current.
Data Source
AI summary
An embodiment relates to an integrated circuit comprising measurement means for detection of a current change, wherein said measurement means comprise at least one coil.