Drone Motor Stator Protrusions for Heat Dissipation
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Solution Overview
Problem
Drone motors face challenges in heat dissipation and water/foreign substance ingress due to high heat generation and exposure in flying environments, which affects performance and reliability.
Innovation Solution
A motor design featuring a stator with annular yoke, teeth, and protrusions forming a flow path for air to dissipate heat, combined with a rotor cover and housing that prevents water ingress, allowing for efficient heat dissipation without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation structure is added to communicate inside and outside of the motor, then heat dissipation effect is improved, but water or foreign substances may invade into the motor
Solution Approach 1:
The patent merges the heat dissipation function with the protective housing structure by integrating flow paths directly into the stator and housing components. The housing serves dual purposes: protecting internal components while incorporating channels that allow heat to escape without requiring separate openings that would compromise protection.
Solution Approach 2:
The patent introduces air as an intermediary medium that carries heat away from the motor through designated flow paths. This mediator enables heat transfer from the internal stator to the external environment without direct exposure of internal components to external elements like water or foreign substances.
2Reliability
If the heat dissipation structure is spaced apart from the stator, then protection against water is improved, but heat dissipation effect is reduced
Solution Approach 1:
The patent embeds the heat dissipation flow paths within the structure of the stator and housing components themselves. The flow channels are nested inside the housing walls and stator structure, allowing close proximity to heat-generating components while maintaining the protective barrier against water and foreign substances.
Solution Approach 2:
The patent applies different structural qualities to different regions of the motor. The housing has localized thin-walled sections with integrated flow paths near the stator for efficient heat transfer, while other regions maintain thicker protective walls for water and foreign substance protection. This spatial variation in structural quality optimizes both heat dissipation and protection.
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
Enhances heat dissipation and prevents water from entering the motor, simplifying manufacturing and reducing costs while maintaining performance.
Implementation Method 1
high heat is generated by the stator on which a coil is wound
Implementation Method 2
heat generated therein is very high. Accordingly, it is necessary to embody a heat dissipation structure which communicates an inside and an outside of the motor
Implementation Method 3
a flow path for air to dissipate heat
Data Source
AI summary
Provided is a motor for a drone comprising: a rotary shaft; a stator including a hole in which the rotary shaft is disposed; a rotor disposed outside the stator; and a housing coupled to the stator, wherein the stator comprises a stator core and a coil wound around the stator core, wherein the stator core comprises an annular yoke coupled to the housing, teeth extending radially from the yoke, and a shoe disposed at one end of the teeth, wherein the teeth comprise protrusions projecting from the side surface thereof. As such, the present invention provides an advantageous effect of securing an air flow path for heat radiation to enhance a heat radiating effect while preventing water or foreign matter from flowing into the motor.