Folded Coil Current Detection Device for Magnetic Flux Density
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Solution Overview
Problem
Current current detection devices face challenges in miniaturization and cost reduction due to the complexity of their multi-layer structures and the difficulty in efficiently measuring magnetic fields generated by coils.
Innovation Solution
A current detection device is designed with a two-board structure, where coils and a magnetic measurement element are positioned to generate magnetic fields in the same direction, allowing for a reduced number of boards and increased magnetic flux density, enabling miniaturization and cost reduction while maintaining sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If two coils are disposed opposite to each other with a magnetic measurement element between them to obtain high magnetic field strength, then magnetic field strength is improved, but device complexity and number of boards increase
Solution Approach 1:
The patent combines the first coil and second coil into a single integrated coil structure where the coil is folded back to form opposite sides. This merging eliminates the need for separate coils and reduces the number of boards required, while still generating the necessary magnetic field strength through the folded coil configuration.
Solution Approach 2:
The magnetic measurement element is positioned within the folded coil structure, nesting the measurement element between the opposite sides of the folded coil. This nesting arrangement achieves high magnetic field strength at the measurement location without requiring separate opposing coils on different boards, thereby reducing device complexity.
2Strength
If two coils are disposed opposite to each other to generate high magnetic field strength, then magnetic field strength is improved, but manufacturing cost increases
Solution Approach 1:
By merging two separate coils into a single folded coil, the patent reduces the number of components that need to be manufactured and assembled. This single coil structure can be implemented on fewer boards, reducing manufacturing complexity and cost while maintaining the high magnetic field strength through the folded configuration.
Solution Approach 2:
The folded coil structure serves multiple functions: it generates magnetic field in one direction, provides structural support, and positions the magnetic measurement element appropriately. This multi-functionality reduces the need for separate components, thereby lowering manufacturing costs.
3Strength
If a multi-layer structure with two coils is used to achieve high magnetic field strength, then magnetic field strength is improved, but device size increases
Solution Approach 1:
The magnetic measurement element is nested within the folded coil structure, positioned between the opposite sides of the fold. This nesting allows the measurement element to be located where the magnetic field is strongest without requiring additional space for separate coils, thereby reducing the overall device volume while maintaining high magnetic field strength.
Solution Approach 2:
The folded coil structure combines the functions of two separate coils into a single compact structure. By folding the coil back on itself, the patent achieves the magnetic field generation of two opposite coils within a smaller volume, reducing the overall device size.
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 device achieves miniaturization and cost-effectiveness by reducing the number of boards and increasing magnetic flux density, providing a more sensitive current detection solution.
Implementation Method 1
A current detection device detects a magnetic field generated by a current flowing in a coil
Implementation Method 2
detects a magnetic field generated by a current flowing in a coil by using a magnetic measurement element such as a Hall element
Data Source
AI summary
Provided is a current detection device including: a first board; a second board provided above the first board in parallel to the first board; a magnetic measurement element provided between the first board and the second board; a first coil having at least one of a first wire provided on the first board or a second wire provided on the second board and having a first connection conductor connected to the first wire provided on the first board or the second wire provided on the second board; and a second coil having at least one of a third wire provided on the first board or a fourth wire provided on the second board and having a second connection conductor connected to the third wire provided on the first board or the fourth wire provided on the second board, the second coil being connected to the first coil such that magnetic fields generated in the first coil and the second coil by a current for electrically conducting the first coil and the second coil have the same direction.