Hall Sensor Current Leakage Detection via Magnetic Core Segmentation
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Solution Overview
Problem
Conventional systems for eco-friendly vehicles, such as hybrid and electric vehicles, cannot detect individual insulation resistances of high voltage loads, making it difficult to locate current leakage, and thus, are limited in detecting specific locations of current leakage within the vehicle.
Innovation Solution
A current leakage detection system utilizing a magnetic core and hall sensors to sense magnetic fields induced by current differences in positive and negative electrode wirings, allowing for the detection of current leakage in electric loads and batteries, and including a detection unit to determine the presence of leakage based on sensed magnetic field magnitudes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional combined insulation resistance measurement is used, then the measurement system is simple, but the ability to detect individual insulation resistances and locate current leakage is lost
Solution Approach 1:
The patent divides the detection system into multiple independent detection units, each equipped with its own magnetic core and hall sensor. Each detection unit independently monitors a specific electric load, enabling individual insulation resistance measurement and precise location identification of current leakage without requiring a complex centralized system.
2Reliability
If multiple detection units are deployed to detect individual loads, then current leakage location can be identified, but the system complexity and cost increase
Solution Approach 1:
Each detection unit is designed as a self-contained module with integrated magnetic core, hall sensor, and detection circuitry that independently monitors its associated electric load. This self-service architecture enables reliable individual load detection without requiring complex inter-unit communication or centralized control, thereby maintaining detection accuracy while limiting system complexity.
3Ease of manufacture
If a single measurement unit is used for combined insulation resistance, then manufacturing cost is reduced, but the ability to detect specific leakage locations is lost
Solution Approach 1:
The patent replaces complex electrical measurement systems with a magnetic field-based detection mechanism using hall sensors and magnetic cores. This substitution enables each detection unit to independently measure insulation resistance through magnetic field sensing, preserving location information while maintaining manufacturing simplicity through standardized modular components.
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 precise detection of current leakage locations in vehicles, reducing manufacturing costs by requiring only a single measurement unit for combined insulation resistance, and ensuring safety by cutting off power supply when leakage is detected.
Implementation Method 1
a hall sensor configured to sense a magnetic field induced in the magnetic core
Implementation Method 2
a magnetic core having an internal space... configured to sense a magnetic field induced due to a current difference between the positive electrode wiring and the negative electrode wiring
Data Source
AI summary
A device for detecting a current leakage and a current leakage detection system including the same are provided. The device for detecting a current leakage includes a magnetic core having an internal space and both ends the core are separated from each other. An electric wiring extends to pass through the internal space of the magnetic core, and is connected between a power source and an electric load to supply power from the power source to the electric load. A hall sensor senses a magnetic field induced in the magnetic core.