Electromagnetic Coil Current Sensor for Passive Overcurrent Detection
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Solution Overview
Problem
Conventional overcurrent detection methods are often space-consuming, energy-intensive, complex to integrate, unreliable, or expensive.
Innovation Solution
A current sensor comprising an electromagnetic coil and a transistor, where the transistor controls an output voltage based on the induced voltage, enabling low-cost, fast, and passive current sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional overcurrent detection methods are used, then current detection can be achieved, but the device occupies more space and consumes more energy
Solution Approach 1:
The patent combines the electromagnetic coil and transistor into an integrated current sensor structure, merging multiple functional elements into a single compact device that detects overcurrent conditions without requiring separate detection circuits or components
Solution Approach 2:
The electromagnetic coil serves multiple functions: it acts as both the sensing element for current detection and the actuating element that triggers the transistor to switch states, eliminating the need for separate sensing and actuation components
2Reliability
If conventional overcurrent detection methods are used, then current detection can be achieved, but the device becomes more complex to integrate
Solution Approach 1:
The patent merges the electromagnetic coil and transistor into a single integrated structure, reducing the number of discrete components that need to be assembled and connected, thereby simplifying the integration process while maintaining reliable current detection functionality
3Reliability
If conventional overcurrent detection methods are used, then current detection can be achieved, but the device becomes more expensive
Solution Approach 1:
The patent combines multiple functions into a single integrated structure with fewer discrete components, reducing assembly steps and manufacturing complexity, which directly lowers production costs while maintaining effective overcurrent detection capability
Solution Approach 2:
The electromagnetic coil generates its own operating magnetic field using the current flowing through it, eliminating the need for external power sources or additional excitation circuits, thereby reducing component count and manufacturing cost
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 provides simplified, low-cost, and fast current sensing suitable for over-current detection, particularly in low-power applications, with potential for miniaturization and reduced integration complexity.
Implementation Method 1
an electromagnetic coil configured to output a voltage induced by a current to be measured
Data Source
AI summary
A current sensor is provided. The current sensor includes an electromagnetic coil configured to output a voltage induced by a current to be measured. The current sensor further includes a transistor coupled to the electromagnetic coil. The transistor is configured to control an output voltage of the transistor based on the voltage. The output voltage is indicative of the current to be measured.