Vertical Slit Conductor Geometry for Stable Current Sensor Bandwidth
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Solution Overview
Problem
Conventional conductor designs for current sensors in power supply applications exhibit poor frequency performance, leading to inadequate frequency response in magnetic field sensing elements, which affects the accuracy and reliability of current measurement.
Innovation Solution
The conductor design incorporates specific ratios of widths for its legs and through-holes, optimizing the conductor's shape to minimize the shift in current density with frequency changes, thereby improving the frequency response and accuracy of current sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductor designs are used, then the conductor structure is simple, but the frequency response performance is poor
Solution Approach 1:
The conductor structure implements local quality by creating three legs with different width characteristics. The first and second legs have substantially equal widths, while the third leg has a different width, establishing a specific width ratio relationship. This local differentiation in geometric properties optimizes the current density distribution across different frequency ranges, resolving the contradiction between structural simplicity and frequency response performance.
Solution Approach 2:
The invention applies parameter changes by precisely controlling the width ratio between the third leg and the first/second legs within a specific range (0.45-0.60). This parameter optimization directly addresses the frequency response performance by minimizing current density shift across frequencies, thereby improving reliability without requiring complex structural modifications.
2Measurement precision
If conventional conductor designs are used, then the manufacturing process is simple, but the measurement accuracy is insufficient
Solution Approach 1:
The conductor structure implements local quality by creating three legs with different width characteristics. The first and second legs have substantially equal widths, while the third leg has a different width, establishing a specific width ratio relationship. This local differentiation in geometric properties optimizes the current density distribution across different frequency ranges, resolving the contradiction between structural simplicity and frequency response performance.
Solution Approach 2:
The invention applies parameter changes by precisely controlling the width ratio between the third leg and the first/second legs within a specific range (0.45-0.60). This parameter optimization directly addresses the frequency response performance by minimizing current density shift across frequencies, thereby improving reliability without requiring complex structural modifications.
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 optimized conductor design achieves a gain error of -2% to 1.5% for frequencies up to 1 KHz, enhancing the sensitivity and reliability of current measurement in power supply applications.
Implementation Method 1
the first and second through-holes being arranged to define a first leg, a second leg, and a third leg of the conductor... wherein a ratio between the first width and the third width is in the range of 0.45-0.60
Data Source
AI summary
A system comprising: a conductor having a first through-hole and a second through-hole formed therein, the first and second through-holes being arranged to define a first leg, a second leg, and a third leg of the conductor, the first leg having a first width, the second leg having a second width that is substantially equal to the first width, and the third leg having a third width, the second leg being disposed between the first through-hole and the second through-hole, the first leg being disposed across the first through-hole from the second leg, and the third leg being disposed across the second through-hole from the second leg; and a current sensor that is disposed in the first through-hole, the current sensor being arranged to measure a level of electrical current through the conductor, wherein a ratio between the first width and the third width is in the range of 0.45-0.60.