Current Sensor Y-Axis Coil Orientation Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic balance type current sensors face challenges in managing large currents due to increased manufacturing costs and size when the number of coil turns is increased to alleviate feedback current, necessitating a cost-effective and compact solution.
Innovation Solution
A current sensor design featuring a busbar, a first magnetic sensor measuring in the Y axis direction, and a first coil arranged parallel to the Y axis, without a magnetic core, allowing direct measurement of the magnetic field and reducing feedback current, accompanied by shield members to minimize external magnetic field influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the number of turns N of the coil is increased to alleviate the increase in feedback current, then the feedback current is reduced, but the manufacturing cost and the size of the current sensor increase
Solution Approach 1:
The patent changes the geometric parameters of the coil, specifically setting the coil axis parallel to the Y-axis (width direction of busbar) and positioning it accordingly, which optimizes the magnetic coupling efficiency. This allows achieving the required feedback current level without increasing the number of turns, thus avoiding increased manufacturing cost and size
2Loss of energy
If the number of turns N of the coil is increased to alleviate the increase in feedback current, then the feedback current is reduced, but the size of the current sensor increases
Solution Approach 1:
The patent optimizes the spatial arrangement parameters of the coil and magnetic sensor, positioning the coil axis parallel to the Y-axis and the magnetic sensor to measure the Y-axis component of the magnetic field. This geometric optimization improves magnetic coupling efficiency, allowing the system to achieve adequate feedback current levels with a compact form factor without increasing overall sensor size
3Loss of energy
If the number of turns N of the coil is increased to alleviate the increase in feedback current, then the feedback current is reduced, but the device complexity increases
Solution Approach 1:
The patent simplifies the device structure by optimizing the geometric parameters and spatial arrangement of existing components rather than increasing the number of turns. The coil axis is positioned parallel to the Y-axis with the magnetic sensor measuring the Y-axis magnetic field component, achieving efficient magnetic coupling with a simple, straightforward structure that avoids the complexity of multi-layer or densely wound coils
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
This configuration results in a low-cost, compact current sensor capable of handling large currents by preventing feedback current increase and reducing manufacturing costs, while effectively shielding external magnetic fields.
Implementation Method 1
the first magnetic sensor measures a magnetic field in the Y axis direction
Implementation Method 2
the first coil is arranged such that an axis of the first coil is parallel to the Y axis direction
Data Source
AI summary
A current sensor includes a busbar, a first magnetic sensor, and a first coil, and where a longitudinal direction of the busbar is defined as an X axis direction, and a width direction of the busbar is defined as a Y axis direction, the first magnetic sensor measures a magnetic field in the Y axis direction, the first coil is arranged such that an axis of the first coil is parallel to the Y axis direction, and the first magnetic sensor is arranged inside the first coil.