Current Detection Device Using Branch Busbar and Magnetic Sensor
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Solution Overview
Problem
Current detection devices face complexity in design and manufacturing due to varying shapes and current ranges of conductors like busbars, requiring specific configurations for each electrical apparatus, which complicates the measurement process.
Innovation Solution
A current detection device featuring a main busbar and a semiconductor chip with a branch busbar and detection part, allowing for accurate current measurement without being restricted by the conductor's configuration, using a magnetic sensor to detect the magnetic field generated by the branch current and calculating the current value based on this detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current detection devices are designed for specific conductor shapes and current ranges, then measurement precision is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent creates a universal current detection device that can measure currents of various magnitudes and conductor shapes without requiring different device configurations. The semiconductor chip with integrated branch busbar and magnetic sensor can detect currents from small to large ranges by simply changing the position of the semiconductor chip relative to the main busbar, eliminating the need for multiple specialized detection devices for different current ranges and conductor types.
2Measurement precision
If multiple specialized current detection devices are created for different electrical apparatuses, then measurement precision is improved, but manufacturing cost and development cost increase
Solution Approach 1:
The patent develops a single universal current detection device that can be applied to various electrical apparatuses with different conductor shapes and current ranges. By utilizing the semiconductor chip's ability to detect magnetic fields from branch currents and calculate main busbar currents through parallel circuit principles, the device eliminates the need to manufacture multiple specialized detection devices, thereby reducing manufacturing costs and improving production efficiency.
3Measurement precision
If the detection part is placed close to the branch busbar, then measurement precision is improved, but the device becomes more sensitive to external magnetic fields
Solution Approach 1:
The patent extracts the magnetic sensor from the direct path of the main busbar current and places it only in proximity to the branch busbar. This positioning allows the detection part to sense only the magnetic field generated by the branch current, effectively excluding interference from the main busbar current and external magnetic fields, thereby improving measurement precision while reducing sensitivity to harmful external factors.
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 versatile and accurate current measurement across different conductor configurations, reducing design and production complexities, and allowing for efficient handling of various types of busbars, thereby minimizing development and production costs.
Implementation Method 1
The detection part is arranged adjacent to the branch busbar and detects a first magnetic field generated based on a branch current flowing from the main busbar to the branch busbar
Implementation Method 2
The output part calculates and outputs a current value based on the first magnetic field detected by the detection part
Data Source
AI summary
A current detection device includes a main busbar and a semiconductor chip. A detected current flows through the main busbar. The semiconductor chip is spaced apart from the main busbar. The semiconductor chip includes a branch busbar, a detection part, and an output part. The branch busbar is connected in parallel with the main busbar. The detection part is arranged adjacent to the branch busbar and detects a first magnetic field generated based on a branch current flowing from the main busbar to the branch busbar. The output part calculates and outputs a current value based on the first magnetic field detected by the detection part.