Planar Resonant Converter Transformer Layout for Better Heat Dissipation
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Solution Overview
Problem
Conventional resonant converters using planar transformers face issues with heat dissipation due to large current flow, leading to inefficient heat dissipation and reduced efficiency.
Innovation Solution
A resonant converter design utilizing two circuit boards with a planar transformer that includes an iron core and conductive columns to form a winding, allowing for even heat dispersion and increased heat dissipation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a planar transformer is formed on a single circuit board, then the transformer integration is improved, but the heat dissipation efficiency deteriorates
Solution Approach 1:
The patent divides the planar transformer structure across two separate circuit boards instead of forming it on a single board. The first circuit board carries part of the winding and the second circuit board carries the remaining winding, with the iron core spanning both boards. This segmentation allows better heat distribution and dissipation while maintaining the integrated planar transformer structure.
2Power
If large current flows through a single circuit board, then the power transmission capability is improved, but the heat accumulation increases
Solution Approach 1:
The patent segments the current path by distributing the winding across two circuit boards. The large current is divided and flows through both boards rather than concentrating on a single board, which reduces heat accumulation on any one board while maintaining the overall power transmission capability of the transformer.
Solution Approach 2:
The patent transitions from a two-dimensional single-board layout to a three-dimensional multi-board structure. By stacking circuit boards vertically and using an iron core that spans multiple boards, the current path is extended into the vertical dimension, increasing the effective heat dissipation surface area while maintaining power transmission capability.
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 design effectively disperses heat, increasing circuit efficiency by enhancing heat dissipation and reducing heat loss.
Implementation Method 1
The plurality of wirings are respectively formed around the first circuit board through hole and the second circuit board through hole. The first conductive column is disposed between the first circuit board and the second circuit board, and electrically connected to a wiring arranged around the first circuit board through hole and a wiring arranged around the second circuit board through hole to form a winding of the planar transformer.
Implementation Method 2
The iron core includes a first core column penetrating the first circuit board through hole and the second circuit board through hole. The iron core sleeves the winding of the first circuit board and the second circuit board to form the planar transformer.
Data Source
AI summary
A resonant converter includes a first circuit board, a second circuit board and a planar transformer. The planar transformer includes an iron core, a plurality of wirings, and a first conductive column. A first core column of the iron core penetrates a first circuit board through hole of the first circuit board and a second circuit board through hole of the second circuit board respectively. The wirings are formed around the first circuit board through hole and the second circuit board through hole respectively, and the first conductive column electrically connects the wirings arranged around the first circuit board through hole and the wirings arranged around the second circuit board through hole to form a winding of the planar transformer. The iron core is used to sleeve the winding of the first circuit board and the second circuit board to form the planar transformer.