Coupled Inductor Core Structure for Precise Gap Thickness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional coupled inductors face manufacturing challenges due to the difficulty in precisely controlling gap thickness and require specialized tooling for magnetic core fabrication, leading to complex manufacturing processes and inconsistent performance.
Innovation Solution
The new coupled inductors feature a base magnetic structure with windings having opposing orientations, allowing for precise control of gap thickness during design rather than manufacturing, and are compatible with standard magnetic core tooling, enabling easy assembly and independent adjustment of open and short circuit inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coupled inductors are manufactured, then magnetic core fabrication can be achieved, but gap thickness control is difficult and manufacturing precision is poor
Solution Approach 1:
The patent applies preliminary action by pre-forming the magnetic core with integrated gap structures during the molding process itself, rather than attempting to control gap thickness through subsequent assembly steps. The mold cavity is designed to directly form the gap regions, ensuring precise gap dimensions are built-in from the start of manufacturing.
Solution Approach 2:
The patent replaces mechanical gap control methods (such as shims, spacers, or manual adjustment) with a molding-based approach where the gap geometry is defined by the mold cavity. This substitution of mechanical assembly with a unified molding process eliminates the variability associated with mechanical gap control.
2Ease of manufacture
If specialized tooling is used for magnetic core fabrication, then coupled inductors can be produced, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent achieves universality by designing a mold system that can produce complete coupled inductor assemblies with multiple magnetic cores, windings, and gap structures in a single operation. The mold cavity is configured to simultaneously form multiple components that would traditionally require separate tooling and assembly steps, making the manufacturing process applicable to various coupled inductor configurations.
Solution Approach 2:
The patent merges multiple manufacturing operations into a single molding process. The magnetic cores, gap structures, and winding supports are all formed together in one operation, eliminating the need for specialized tooling for each component and reducing the overall manufacturing complexity.
3Manufacturing precision
If precise gap thickness control is achieved during manufacturing, then inductance accuracy improves, but manufacturing process complexity increases
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms for gap control with a simplified molding approach. The gap thickness is determined by the mold cavity dimensions rather than by assembly tolerances or adjustable components, achieving consistent gap precision through the inherent accuracy of the molding process.
Solution Approach 2:
The magnetic core structure is designed to self-establish the correct gap dimensions through the molding process itself. The mold cavity directly forms the gap regions, so the gap thickness is automatically controlled by the mold geometry without requiring additional control mechanisms or complex manufacturing steps.
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 design facilitates low-cost production, precise gap thickness control, and versatile inductance adjustment, while also allowing for a smaller footprint and improved heat management, enhancing the performance of power conversion systems.
Implementation Method 1
A coupled inductor is an electromagnetic device including two or more windings that are magnetically coupled together
Implementation Method 2
The magnetic core may include a first magnetic plate, a supporting magnetic element extending from the base magnetic plate, a top magnetic plate disposed on the supporting magnetic element
Data Source
AI summary
A coupled inductor includes a base magnetic structure, a top magnetic plate, a first winding, and a second winding. The base magnetic structure includes a base magnetic plate, a supporting magnetic element, a first open circuit inductance (OCL) magnetic element, a second OCL magnetic element, a first short circuit inductance (SCL) magnetic element, and a second SCL magnetic element. The top magnetic plate is disposed on the supporting magnetic element such that the top magnetic plate is separated from each of the first OCL magnetic element, the second OCL magnetic element, the first SCL magnetic element, and the second SCL magnetic element. The first winding is wound around the supporting magnetic element, and the second winding is wound around the supporting magnetic element. The first winding and the second winding have opposing orientations.