Interleaved Three-Phase Inductor Core for Common and Differential Modes
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Solution Overview
Problem
Conventional three-phase inductors face challenges in optimizing both common mode and differential mode inductance, as their magnetic flux paths often overlap, limiting the independent adjustment of differential mode gaps and thus affecting the overall inductance performance.
Innovation Solution
The design incorporates a plurality of core lamination pieces with distinct patterns and shapes to form differential mode gaps, allowing independent adjustment of their thickness, which increases common mode inductance while maintaining adjustable differential mode inductance by interleaving the core structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional three-phase inductor construction with overlapping magnetic flux paths is used, then the structure is simple, but the independent adjustment of differential mode gaps is limited and common mode inductance cannot be optimized
Solution Approach 1:
The core is divided into multiple core lamination pieces (first, second, third core lamination pieces) with distinct patterns. Each piece can be independently manufactured and assembled, allowing separate optimization of differential mode gaps in each piece while contributing to the overall common mode inductance when assembled together.
Solution Approach 2:
Each core lamination piece has locally optimized features - the first piece has first differential mode gaps, the second piece has second differential mode gaps, and the third piece has third differential mode gaps. Each gap can be independently adjusted to achieve optimal differential mode inductance while the collective arrangement maximizes common mode inductance.
2Ease of manufacture
If three core segments are used to construct the three-phase inductor, then the manufacturing is simplified, but the common mode inductance cannot be sufficiently increased
Solution Approach 1:
The core lamination pieces are arranged in a specific three-dimensional configuration where the distinct patterns of each piece are oriented relative to each other. This spatial arrangement creates overlapping magnetic flux paths that collectively increase common mode inductance while maintaining the simplicity of manufacturing three separate core segments.
Solution Approach 2:
The magnetic flux paths from the three core lamination pieces are merged through their overlapping arrangement. The first, second, and third differential mode gaps from respective pieces combine to create a unified magnetic structure that provides both adjustable differential mode characteristics and enhanced common mode inductance.
3Adaptability or versatility
If the magnetic flux paths overlap and circulate around the center of the core construction, then the structure is compact, but the independent adjustment of inductance parameters is restricted
Solution Approach 1:
The design enables dynamic adjustment of differential mode inductance by allowing independent modification of gap thicknesses in each core lamination piece. The distinct patterns in each piece can be adjusted separately, providing adaptability while maintaining the compact overlapping flux path structure.
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 approach enhances the common mode inductance while allowing for adjustable differential mode inductance, improving the performance of three-phase inductors in applications such as Sinewave filters and harmonic mitigating filters.
Implementation Method 1
a three phase inductor has both common mode and differential mode magnetic flux paths that overlap and circulate around the center of the core construction
Implementation Method 2
at least one three-phase inductor, including: at least one core, including: a plurality of core lamination pieces
Data Source
AI summary
In some embodiments, the instant invention involves an electrical system that at least includes: a three-phase inductor, including: a core, including: a plurality of core lamination pieces. having: a first core lamination piece and a second core lamination piece; where the first core lamination piece includes a plurality of first laminations that have a first shape and arranged in a first pattern to form a plurality of first differential mode gaps; where the second core lamination piece includes a plurality of second laminations that have a second shape and arranged a second pattern to form a plurality of second differential mode gaps; where the first pattern and the second pattern are distinct; where the first core lamination piece and the second core lamination piece are positioned at a particular orientation of the first pattern to the second pattern so that to increase a common mode inductance of the core.