Magnetic Field Detector Module With Concentrators And Airgap

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Solution Overview

Problem

Existing magnetic field detector modules for current sensing applications lack versatility and adaptability to various measurement requirements and environmental conditions, while also being costly to manufacture and use.

Innovation Solution

A magnetic field detector module comprising a pair of magnetic field concentrators, an airgap, a magnetic field sensing cell, and a circuit board with terminals for interconnection, housed in an insulating body, allowing for flexible configuration and cost-effective assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a magnetic field detector module is designed with fixed configuration for durability and reliability, then measurement accuracy is improved, but adaptability to various applications and operating environments deteriorates

Engineering Contradiction:

ImprovedurabilityVSAvoidversatility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The magnetic field detector module is divided into separable components including the magnetic field sensing cell, magnetic field concentrators, circuit board, and insulating housing. This segmentation allows different components to be optimized independently for specific applications while maintaining overall reliability, enabling the system to adapt to various measurement requirements and environmental conditions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The module design incorporates universal features such as standardized mounting contacts, configurable signal processing circuits, and adaptable magnetic field concentrator geometries that allow the same basic module structure to serve multiple current sensing applications and operating environments, thereby achieving both reliability and versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If magnetic field concentrators are overmolded in a dielectric body for protection, then reliability is improved, but manufacturing cost and complexity increase

Engineering Contradiction:

ImproveprotectionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The insulating housing integrates multiple functions including mechanical protection of magnetic field concentrators, structural support for mounting contacts, and magnetic shielding. By combining these functions into a single molded component rather than separate parts, the design reduces assembly steps and manufacturing cost while maintaining protective reliability.

Inventive Principle:

Principle #5Merging (Combining)

3Measurement precision

If the magnetic field detector module is designed as a compact integrated unit, then measurement accuracy is improved, but adaptability for configuration during installation deteriorates

Engineering Contradiction:

ImproveaccuracyVSAvoidconfiguration flexibility

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The module incorporates adjustable and configurable elements such as selectable gain settings, programmable signal processing parameters, and adaptable mounting configurations that allow the compact integrated unit to be tailored during installation to specific application requirements while maintaining its compact form factor and measurement accuracy.

Inventive Principle:

Principle #15Dynamics

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 module achieves durability, reliability, and versatility in current sensing applications, with enhanced measurement accuracy and adaptability to different environments, while maintaining cost-effectiveness.

Implementation Method 1

a magnetic field sensing cell mounted within the airgap

Methodology Applied

Scientific EffectMagnetic field sensing: Magnetic Field

Implementation Method 2

a pair of magnetic field concentrators, an airgap formed between the pair of magnetic field concentrators

Methodology Applied

Scientific EffectMagnetic field concentration: Magnetic Field

Data Source

PatentUS12320828B2Magnetic field detector module

Publication Date: 2025.06.03 LEM INT SA

AI summary

Magnetic field detector module comprising a pair of magnetic field concentrators, an airgap formed between the pair of magnetic field concentrators, a magnetic field sensing cell mounted within the airgap, a plurality of terminals for interconnecting the magnetic field sensing cell to an external circuit, and an insulating housing within which the magnetic field concentrators, magnetic field sensing cell, and the terminals are assembled. The magnetic field detector module further comprises a circuit board on which the magnetic field sensing cell is mounted such that a portion of the circuit board is inserted in the airgap, each terminal having a substantially planar shape cut out of a sheet of metal arranged substantially orthogonally to the circuit board and comprising an internal board connection portion having a pair of opposed contacts separated by a slot, each contact engaging a respective side of the circuit board.