Fan Motor PCB Mounting for Compact High-Profile Components
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Solution Overview
Problem
Fan motors face limitations in design height and reduced printed circuit board area, which restrict the mounting of components with large heights and compromise heating efficiency, leading to degraded performance.
Innovation Solution
The fan motor design includes a printed circuit board with a first mounting portion inside the blade's radius and a second mounting portion outside, allowing components of varying heights to be mounted, and a board coupling portion with component holes between the blade's surfaces for enhanced cooling, along with a board cover for air circulation and cable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the printed circuit board is positioned under the blade with components mounted on it, then the fan motor structure is compact, but components with large heights cannot be mounted due to design height limitations
Solution Approach 1:
The printed circuit board is divided into two distinct mounting portions: a first mounting portion positioned inside the blade's radius and a second mounting portion positioned outside the blade's radius. This segmentation allows different components to be mounted at different radial positions, enabling components with large heights to be mounted on the second portion while maintaining compact structure overall.
2Ease of operation
If a hole is formed in the printed circuit board for shaft passage, then the rotor shaft can pass through, but the total area of the printed circuit board decreases reducing heating efficiency
Solution Approach 1:
The printed circuit board features localized heating portions with different area allocations. The first heating portion is positioned at a first radius from the center and the second heating portion at a second radius, allowing strategic placement of heating elements to maximize effective heating area while accommodating the shaft passage hole.
3Ease of operation
If the printed circuit board area is reduced to accommodate shaft holes, then the shaft can pass through, but performance of mounted components degrades due to reduced heating efficiency
Solution Approach 1:
The patent transitions from considering only the two-dimensional area of the printed circuit board to a three-dimensional approach by creating multiple heating portions at different radial distances from the center. This dimensional approach allows the shaft hole to be accommodated while maintaining sufficient heating area through strategic placement of heating zones at different radii.
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 configuration enables the mounting of components with large heights within a limited design height while maintaining effective cooling and electromagnetic compatibility, even with a reduced printed circuit board area, improving overall performance.
Implementation Method 1
the stator and the rotor may induce an electromagnetic interaction to induce rotation of the rotor
Implementation Method 2
a board cover for air circulation and cable connection
Data Source
AI summary
The present invention provides a fan motor which includes a housing, a stator disposed inside the housing, a rotor disposed inside the stator, a blade coupled to the rotor and a printed circuit board disposed under the blade, wherein the housing includes an upper housing and a lower housing, wherein a board coupling portion to which the printed circuit board is coupled is disposed concavely formed at a lower outer surface of the lower housing, and the first mounting portion of the printed circuit board is coupled to the board coupling portion, wherein the board coupling portion includes a component hole and the component hole is disposed between an outer circumferential surface of the blade and an inner circumferential surface thereof. Therefore, an advantageous effect that a component having a large height may be mounted within a limited design height.