Heat-Dissipating Fan With External Drive Circuit
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Solution Overview
Problem
Conventional heat-dissipating fans face challenges in achieving a compact design due to the axial height limitations imposed by the stator core and drive circuit components, making it difficult to integrate them into miniature electronic devices.
Innovation Solution
The design incorporates a shaft seat with a coil base that omits electronic drive circuit elements, featuring a coil unit integrated between insulating layers and a connection port for external drive circuit connection, along with an impeller and housing that guide air currents, reducing axial height and volume while simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stator core and drive circuit are included in the heat-dissipating fan, then the fan can achieve reliable motor operation, but the axial height and volume of the fan increase
Solution Approach 1:
The drive circuit is extracted from the internal structure of the heat-dissipating fan and relocated to an external position. The coil base includes only the coil unit and connection port, while the drive circuit is mounted externally on the housing, eliminating the need for a separate stator core and reducing internal axial height.
Solution Approach 2:
The drive circuit is relocated from the internal axial dimension to an external mounting position on the housing. This dimensional reorganization allows the internal axial height to be reduced while the drive circuit functionality is maintained in a different spatial location.
2Reliability
If a stator core and drive circuit are included in the heat-dissipating fan, then the fan can achieve reliable motor operation, but the volume of the fan increases
Solution Approach 1:
The drive circuit is extracted from the internal volume of the fan assembly and mounted externally on the housing. This removes the volume occupied by the stator core and drive circuit from the internal fan structure, reducing the overall volume while maintaining functionality.
3Length of stationary object
If the coil unit is positioned closer to the impeller to reduce axial height, then the axial height is reduced, but the air gap may be compromised affecting motor performance
Solution Approach 1:
By extracting the drive circuit from the internal structure, the coil unit can be positioned optimally within the reduced internal space. The connection port on the coil base provides flexible electrical connection while maintaining the necessary air gap between the coil unit and impeller for proper motor performance.
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 effectively reduces the axial height and volume of the heat-dissipating fan, enabling a more compact and lightweight design suitable for miniature electronic devices with enhanced air driving efficiency.
Implementation Method 1
a coil unit (22) coupled to the base portion... The coil unit is intermediate the outer layer and the fixed portion of the shaft seat along the axis... A permanent magnet (32) is coupled to the hub and aligned with the coil unit (22)
Data Source
AI summary
A heat-dissipating fan includes a shaft seat. A coil base is coupled to the shaft seat. The coil base includes a base portion and a coil unit coupled to the base portion. The base portion includes a connection port electrically connected to the coil unit. The connection port is connected to a drive circuit. An impeller includes a hub and a permanent magnet. A shaft is coupled to the hub and rotatably coupled to the shaft seat about an axis. The permanent magnet is coupled to the hub and aligned with the coil unit. Since the coil base does not include electronic elements of the drive circuit, the axial height of the heat-dissipating fan is reduced, and the structure of the heat-dissipating fan is simplified.