Magnetic Sensor Sealing for High Dielectric Withstand
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Solution Overview
Problem
Current magnetic and current detection devices face challenges in achieving high dielectric withstand capabilities, which are essential for reliable operation in various applications.
Innovation Solution
The implementation of a magnetic detection device and current detection device design that includes a magnetic sensor to detect magnetic fields generated by currents, a conductor with a roughened bottom surface, and a sealing member to separate the magnetic sensor from the conductor, ensuring effective insulation and high withstand voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the magnetic sensor is placed close to the conductor for detection, then the detection sensitivity is improved, but the dielectric withstand capability deteriorates
Solution Approach 1:
A sealing member (insulating tape or resin layer) is introduced as an intermediary between the magnetic sensor and the conductor. This intermediary maintains close proximity for high detection sensitivity while providing sufficient insulation for dielectric withstand capability of 1000 V or more.
2Device complexity
If the sealing structure is simplified, then the device complexity is reduced, but the dielectric withstand capability deteriorates
Solution Approach 1:
The thickness of the sealing member is controlled within a specific range (0.01 mm to 0.1 mm for insulating tape, 10 µm to 100 µm for resin layer). This parameter optimization achieves high dielectric withstand capability while maintaining a simple and thin sealing structure.
3Reliability
If the conductor and magnetic sensor are separated by a large distance, then the dielectric withstand capability is improved, but the detection sensitivity deteriorates
Solution Approach 1:
The sealing member is designed with locally optimized properties: it is positioned only where needed between the sensor and conductor, with controlled thickness (0.01-0.1 mm for tape, 10-100 µm for resin). This localized quality provides sufficient insulation without excessive distance that would reduce detection sensitivity.
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
This design enhances the dielectric withstand capabilities of the detection devices, enabling reliable operation and miniaturization while preventing interface formation between the sensor and the conductor, thus improving performance and durability.
Implementation Method 1
a magnetic sensor that detects a magnetic field generated by current flowing through the conductor
Implementation Method 2
high dielectric withstand capabilities are asked for... ensuring effective insulation and high withstand voltage
Data Source
AI summary
A current sensor (current detection device) 100 includes a conductor 10 through which measurement-target current flows, a magnetic sensor 30 that detects magnetic fields generated by current flowing through the conductor and a package 60 that, together with at least part of the conductor, separates the magnetic sensor from the conductor and covers and seals in their outer surfaces. Together with a curved portion 13 of the conductor, the package separates, from the conductor through which measurement-target current flows, the magnetic sensor that detects magnetic fields generated by current flowing through the conductor and covers and seals in their outer surfaces so that an interface that can spread in the package, in which the magnetic sensor is embedded, from its boundaries with it is not formed; therefore, a high withstand voltage can be obtained.