Electronic Module Current Detection via Winding Coil
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Solution Overview
Problem
Conventional current detection methods, such as using shunt resistors, face challenges in accurately detecting large currents without significant size increases, leading to poor accuracy and mounting difficulties in electronic modules.
Innovation Solution
An electronic module design incorporating a detection part with a winding wire and winding return wire that surrounds the connection body or conductor part, allowing for accurate current detection without excessive size, utilizing semiconductor materials and configurations like pseudo Rogowski coils to enhance miniaturization and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a shunt resistor is used to detect current, then current detection is achieved, but the size increases significantly for large currents making mounting difficult
Solution Approach 1:
The patent replaces the mechanical shunt resistor with a magnetic field-based detection system using a Rogowski coil. The coil detects current through electromagnetic induction without direct electrical contact, eliminating the need for large physical resistors while maintaining detection accuracy for high currents.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the current-carrying conductor and the detection system. The Rogowski coil detects the magnetic field generated by the current, which then gets integrated to obtain the current value, providing a non-contact measurement solution.
2Measurement precision
If a shunt resistor is used for current detection, then current measurement is possible, but mounting space requirements increase
Solution Approach 1:
The patent substitutes the physical shunt resistor with an electromagnetic detection system. The Rogowski coil wraps around the conductor and detects current through magnetic field induction, requiring minimal mounting space compared to large power-rated shunt resistors.
Solution Approach 2:
The Rogowski coil design can detect currents of any magnitude without requiring different physical sizes, as the detection capability scales with the integration circuit rather than physical dimensions. This provides universal current detection across different current ranges.
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 changes through electronic elements with a compact design, reducing manufacturing costs and maintaining high accuracy even at high currents, while facilitating easier integration into electronic modules.
Implementation Method 1
a detection part having a winding wire part provided so as to surround the connection body, and a winding return wire part connected to a terminal end part of the winding wire part and returns from the terminal end part toward a starting end part
Data Source
AI summary
An electronic module has an electronic element 210; a connection body 250 provided on a front face of the electronic element 210; and a detection part 100 having a winding wire part 10 provided so as to surround the connection body 250, and a winding return wire part 50 connected to a terminal end part of the winding wire part 10 and returns from the terminal end part toward a starting end part.