Ring-Motor Ducted Fan Housing for High-Output Cooling
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Solution Overview
Problem
High output ducted fans face challenges in cooling the ring motor due to increased heat generation, which affects their performance.
Innovation Solution
The ducted fan design incorporates a housing with a cylindrical shape, a ring motor, and fan blades extending radially inward, featuring a first and second housing with an annular opening portion, stator core with fluid flow paths, and airfoil-shaped connecting portions to facilitate airflow for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the ring motor is used to drive the propeller in a ducted fan, then the fan can generate high output, but the heat generation amount of the ring motor increases and requires cooling
Solution Approach 1:
The housing is divided into a first housing and a second housing that can be separated from each other. The stator core is segmented with multiple fluid flow paths formed between the teeth, allowing cooling air to flow through different regions. This segmentation enables effective heat dissipation from the ring motor while maintaining high output capability.
Solution Approach 2:
Cooling air serves as an intermediary medium to transfer heat from the ring motor. The air flows through the fluid flow paths in the stator core and the gap between the rotor core and housing, absorbing heat and carrying it away. This intermediary cooling air enables heat dissipation without directly contacting the motor components.
2Temperature
If cooling structures are added to the ducted fan, then the ring motor can be cooled effectively, but the device complexity increases
Solution Approach 1:
The housing structure serves multiple functions: it provides mechanical support, contains the ring motor, and acts as a cooling system. The fluid flow paths in the stator core and the gap between the rotor core and housing are used both for magnetic flux circulation and for cooling air flow. This multi-functionality reduces device complexity while maintaining effective cooling.
Solution Approach 2:
The cooling system is merged with the existing housing and motor structure. The fluid flow paths are formed between the teeth of the stator core, utilizing the existing magnetic circuit structure. The gap between the rotor core and housing serves dual purposes as both a magnetic air gap and a cooling channel, eliminating the need for separate cooling components.
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 cools the ring motor by utilizing airflow through fluid flow paths and airfoil-shaped connecting portions, enhancing cooling efficiency and maintaining performance.
Implementation Method 1
a stator core with fluid flow paths formed between teeth
Implementation Method 2
airfoil-shaped connecting portions to facilitate airflow for efficient heat dissipation
Data Source
AI summary
A ducted fan that includes a housing with a cylindrical shape, a ring motor in the housing, and fan blades extending radially inward from an inner circumferential surface of the ring motor. The housing includes a first housing that covers a first side in an axial direction of the ring motor and a second housing that covers a second side in the axial direction of the ring motor. The second housing includes through holes penetrating the second housing at a portion on the second side in the axial direction with respect to the ring motor. The housing includes an outer circumferential wall including first and second wall portions located in outer circumferential portions of the first and second housings. The outer circumferential wall includes opening portions defined by a gap between the first and second wall portions.