Current Detector Winding Segmentation for Signal Stability
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Solution Overview
Problem
Current current detectors with windings formed only partially around a toroidal core experience significant fluctuations in detection signal properties due to the position of the measured wire within the magnetic core, leading to inconsistent measurements.
Innovation Solution
A current detector with a ring-shaped magnetic core and a detection winding uniformly formed around its entire circumference, composed of alternating series connections of first and second unit windings, strategically positioned to minimize adjacent turns and maximize distance between equivalent windings, along with a detection resistor connected in series to stabilize the signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the winding is formed around only part of a toroidal core, then the device complexity is reduced, but the measurement precision deteriorates due to signal fluctuations according to wire position
Solution Approach 1:
The detection winding is divided into multiple unit windings (first unit windings and second unit windings) that are arranged alternately around the magnetic core. This segmentation allows the winding to cover the entire circumference while maintaining a manageable structure, resolving the contradiction between reduced complexity and improved measurement precision.
Solution Approach 2:
Different unit windings are positioned at different locations around the magnetic core circumference. The first unit windings and second unit windings are alternately arranged, creating local variations in winding distribution that collectively improve overall signal stability while maintaining reasonable structural complexity.
2Measurement precision
If the winding is uniformly formed around the entire circumference of a toroidal core, then the measurement precision is improved by reducing signal fluctuations, but the device complexity increases
Solution Approach 1:
The uniform winding around the entire circumference is achieved through segmentation into multiple unit windings arranged in a systematic alternating pattern. This approach distributes the complexity across multiple simple repeating units rather than requiring a single complex continuous winding.
Solution Approach 2:
Instead of forming a continuous uniform winding directly, the invention uses discrete unit windings arranged alternately to achieve the equivalent effect. This inverted approach of using separate alternating segments rather than a continuous uniform structure simplifies the manufacturing process while maintaining measurement precision.
3Device complexity
If the jth first unit winding and jth second unit winding are adjacent, then the device complexity is reduced, but the measurement precision deteriorates due to increased electrical losses
Solution Approach 1:
The first unit windings and second unit windings are arranged in an asymmetric alternating pattern around the magnetic core, with deliberate spacing between adjacent unit windings of the same type. This asymmetric arrangement reduces electrical losses by minimizing interference between adjacent windings while maintaining a relatively simple overall structure.
Solution Approach 2:
The winding arrangement extends around the three-dimensional circumference of the toroidal core, utilizing the spatial dimension to separate first and second unit windings. This spatial distribution in multiple dimensions reduces electrical losses compared to a planar arrangement while keeping the structure manageable.
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 significantly reduces signal fluctuations and electrical losses, enabling more accurate and consistent current measurements across various wire positions within the magnetic core, expanding the measurement range and simplifying resistor selection.
Implementation Method 1
a detection winding formed on an outer surface of the magnetic core; and a detection resistor that is connected in series to the detection winding and converts a current flowing in the detection winding due to a measured current flowing on the measured wire that has been inserted through the magnetic core to a voltage
Data Source
AI summary
A current detector includes a ring-shaped core for inserting a wire; a detection winding on the core; and resistor connectors for connecting a resistor in series to the detection winding. The detection winding has a first winding at a first end and a second winding at a second end that are connected in series. The first winding and second winding each have n (where n is three or higher) first or second unit windings in series. The core surface is partitioned into 2n regions around the core. The first unit windings are formed in odd-numbered regions and the second unit windings are formed in even-numbered regions. A jth (where j is 1 to n) first unit winding from the first end and a jth second unit winding from the second end are not adjacent and are formed with an equal number of turns.