Compact High Short Circuit Current Reactor with Vertical Stacked Coils
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Solution Overview
Problem
Existing compact three-phase line reactors struggle to achieve high short circuit current capabilities within limited spaces while maintaining efficiency and minimizing maintenance and capital costs.
Innovation Solution
A unique core structure with vertically stacked coils and common yoke sections for flux cancellation, utilizing direct butt joints and adhesive materials to facilitate customization and rapid assembly, allowing for varying gap dimensions between internal core sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional reactor designs are used, then the reactor can provide basic short circuit current capability, but the reactor occupies excessive space and cannot achieve high short circuit current capability within compact dimensions
Solution Approach 1:
The reactor core is divided into multiple discrete core sections (first core section, second core section, third core section, fourth core section) that are stacked together. Each core section contains specific coil windings, allowing the magnetic flux paths to be segmented and controlled independently. This segmentation enables compact arrangement while maintaining the required magnetic circuit functionality for high short circuit current capability.
Solution Approach 2:
The patent implements a nested core structure where the third core section is positioned within the central opening formed by the first and second core sections. Similarly, the fourth core section is nested within the central opening of the third core section. This nested arrangement maximizes space utilization and achieves compact reactor dimensions while maintaining the magnetic flux paths necessary for high short circuit current capability.
2Strength
If core sections are stacked with interleaved joints, then structural integrity is improved, but manufacturing complexity and assembly time increase
Solution Approach 1:
The patent combines multiple core sections and yoke structures into integrated assemblies. The first core section is integrally formed with a first yoke, and the second core section is integrally formed with a second yoke. These pre-assembled units are then stacked together with simple butt joints, eliminating the need for complex interleaved connections while maintaining structural integrity through the unified magnetic circuit design.
3Manufacturing precision
If fixed core gap dimensions are used, then manufacturing precision is simplified, but adaptability to different applications is reduced
Solution Approach 1:
The patent provides for adjustable core gap dimensions by allowing the core sections to be positioned at different distances from each other during assembly. The gap between core sections can be varied to change the magnetic reluctance, thereby adjusting the reactor's impedance characteristics. This dynamic adjustability enables the same reactor design to be adapted to different applications with varying electrical requirements while maintaining straightforward manufacturing of the core components themselves.
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 enables a compact high short circuit current reactor with enhanced operating characteristics, including 120-degree flux cancellation, reduced maintenance, and lower initial costs, while maintaining efficiency and flexibility in multiple applications.
Implementation Method 1
A unique core structure with at least two uniquely positioned coils positioned for flux cancellation through common core sections positions therebetween
Data Source
AI summary
A three phase compact high short circuit current reactor also commonly known as an inductor is disclosed which can be easily be modified during initial construction to provide predefined gaps between the internal core sections for enhancing performance for each individual customized application. Inductor core sections are commonly oriented horizontally. The present design provides a core construction which includes multiple vertically stacked coils with yokes positioned between adjacent coils for facilitating flux cancellation to enhance performance. The coils can be round or square in cross-section and normally are made of either wire or foil usually of copper or aluminum. The material of the core is preferably of a silicon steel material which can be grain-oriented or non-grain-oriented.