Mixed Current Sensor Modular Cassette Assembly
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Solution Overview
Problem
Current Rogowski-type current measurement devices and magnetic current sensors face challenges in industrialization due to complex geometries and fitting issues, particularly with ring-shaped solenoids, which hinder efficient assembly and large measurement range saturation.
Innovation Solution
A mixed current sensor design featuring linking cassettes with clip-fastening and tenon-and-mortar systems for secure positioning and connection of coils and magnetic circuits, along with electronic acquisition means, facilitates reproducible assembly and measurement, utilizing insulating shells and support plates for stable fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ring-shaped solenoids are used for current measurement, then measurement efficiency and range are improved, but manufacturing complexity and fitting difficulty increase
Solution Approach 1:
The patent divides the current measurement device into separate modular components: a Rogowski coil module and a magnetic sensor module, each with its own support structure. This segmentation allows each module to be manufactured and tested independently, simplifying the industrialization process while maintaining the functional benefits of the ring-shaped geometry for accurate current measurement across a wide range.
2Productivity
If ring-shaped solenoids are used for current measurement, then measurement efficiency is improved, but assembly and fitting complexity increase
Solution Approach 1:
The patent merges the support structure with the linking mechanism by integrating clip-fastening elements directly into the supports that hold the Rogowski coil and magnetic sensor. This combination eliminates separate assembly steps for mounting and linking, reducing fitting complexity while maintaining the measurement efficiency benefits of the ring-shaped solenoid configuration.
3Measurement precision
If magnetic core is used in current sensor, then measurement sensitivity is improved, but saturation occurs limiting measurement range
Solution Approach 1:
The patent employs a hybrid measurement system that dynamically switches between two sensing mechanisms: the Rogowski coil for high-current measurements where the magnetic core would saturate, and the magnetic sensor with core for low-current measurements where higher sensitivity is needed. This dynamic approach allows the system to maintain measurement precision across the entire range without saturation limitations.
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 solution simplifies the industrialization of current measurement devices by enabling reproducible and secure assembly, reducing fitting complexities and allowing for large measurement ranges without magnetic core saturation, thereby enhancing the efficiency and reliability of current measurement.
Implementation Method 1
A conducting wire is coiled on the support to form a secondary winding. The assembly forms a transformer where said current conductor or line forms a primary winding and said secondary winding supplies a measurement signal. The voltage supplied at the terminals of the secondary winding is directly proportional to the intensity of the electric current flowing in the current conductor or line.
Implementation Method 2
a magnetic current sensor having a second coil wound around a magnetic circuit
Data Source
AI summary
The invention relates to a mixed current sensor comprising in a case:a current measurement device comprising a first coil;a magnetic current sensor having a second coil,electronic measurement means.Said sensor comprises:a first cassette comprising first linking means arranged to fix said cassette to the first coil by clip-fastening and second linking means arranged to secure the measurement device on the case;a second cassette comprising third linking means arranged to secure and fix both the magnetic sensor on the case and the first cassette and the measurement device by clip-fastening on said case.