Slim Magnetic Coupling Structure to Prevent Coil Discharge
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Solution Overview
Problem
The challenge is to create a slim magnetic coupling device that prevents discharge phenomena and reduces parasitic capacitance, particularly in situations where it is difficult to secure the insulation distance between the primary coil and the secondary coil due to decreased thickness of the cores in flat panel display devices.
Innovation Solution
The proposed solution involves a magnetic coupling device with a core portion comprising upper and lower cores spaced apart, primary and secondary coils disposed between the cores, and a core connector that electrically connects the upper and lower cores. The core connector contacts the outer side surfaces of the cores, and the spacing distance between the primary and secondary coils is minimized to reduce parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of cores is decreased to slim the magnetic coupling device, then the overall thickness is reduced, but the insulation distance between primary coil and secondary coil becomes insufficient, causing discharge phenomena and increased parasitic capacitance
Solution Approach 1:
The core is divided into upper and lower core portions that are spaced apart, with the primary coil disposed between the upper core and primary yoke, and the secondary coil disposed between the lower core and secondary yoke. This segmentation allows each coil to be isolated from the opposite coil by multiple magnetic path components, maintaining adequate insulation distance even when overall device thickness is reduced.
Solution Approach 2:
The patent introduces a vertical spacing between upper and lower core portions in the thickness direction, creating additional dimensional separation. The primary and secondary coils are positioned in different vertical levels within the magnetic path, effectively using the thickness dimension to maintain insulation distance while keeping the device slim.
2Loss of energy
If the spacing distance between primary coil and secondary coil is reduced to minimize parasitic capacitance, then electromagnetic coupling efficiency improves, but the risk of discharge phenomena increases due to insufficient insulation
Solution Approach 1:
The upper core and lower core portions act as intermediary magnetic path components that physically separate the primary and secondary coils. These intermediary structures provide both magnetic coupling functionality and electrical insulation, allowing the coils to be positioned close together while preventing direct contact and discharge phenomena.
Solution Approach 2:
The patent replaces traditional mechanical insulation structures (such as insulating spacers or air gaps) with a magnetic path-based insulation system. The magnetic cores themselves provide the insulation function through their physical arrangement, eliminating the need for separate mechanical insulation components and enabling closer coil spacing.
3Power
If transformers are increased in number to meet power consumption requirements, then power supply capacity increases, but the area occupied in the power supply unit excessively increases
Solution Approach 1:
The patent combines primary and secondary magnetic paths into a single integrated magnetic coupling device structure. The upper and lower core portions form a unified magnetic circuit that supports both primary and secondary coils, effectively merging two separate transformer functions into one compact unit, thereby reducing the overall area required in the power supply unit.
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 effectively prevents discharge phenomena and reduces parasitic capacitance, allowing for the slimming of magnetic coupling devices while maintaining effective magnetic coupling characteristics.
Implementation Method 1
a core connector electrically connected to the upper core and the lower core, wherein the spacing distance between the primary coil and the secondary coil in the first direction is 0.025 or less times of the sum of the thickness of the upper core in the first direction and the thickness of the lower core in the first direction, and the core connector contacts the outer side surface of the upper core and the outer side surface of the lower core
Implementation Method 2
a magnetic coupling device includes a core portion including an upper core and a lower core spaced apart from each other in a first direction, a primary coil and a secondary coil disposed between the upper core and the lower core
Data Source
AI summary
A magnetic coupling device is disclosed. The magnetic coupling device includes a core portion including an upper core and a lower core spaced apart from each other in a first direction, a primary coil and a secondary coil disposed between the upper core and the lower core in the state of being spaced apart from each other in the first direction, and a core connector electrically connected to the upper core and the lower core. A discharge phenomenon of a slim magnetic coupling device is prevented by the provision of the core connector.