Coaxial Propeller Driving Unit for UAV
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Solution Overview
Problem
Conventional UAVs are often bulky and heavy, making them inconvenient to carry and store due to the extended arrangement of propellers, which complicates handling and storage.
Innovation Solution
A propeller driving unit with two motor modules coaxially arranged within a common shaft assembly, allowing independent operation of each propeller set, reducing size and weight, and enabling a compact design that facilitates easier handling and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If propellers are extended outwardly from the main body of the UAV, then the UAV can generate sufficient lift and thrust for flight, but the UAV becomes bulky and heavy, making it inconvenient to carry and store
Solution Approach 1:
The patent applies nesting by placing one motor module inside another motor module in a coaxial arrangement. The first motor module is positioned within the second motor module, allowing both motors to occupy the same spatial envelope. This nested configuration enables the UAV to maintain multiple propellers for adequate lift and thrust generation while significantly reducing the overall footprint and weight of the motor assembly, making the UAV more portable and easier to store.
2Stability of the object's composition
If propellers are extended outwardly from the main body of the UAV, then the UAV can achieve stable flight control, but the extended arrangement complicates handling and storage
Solution Approach 1:
The nested motor module configuration allows the UAV to maintain multiple independently controlled propellers for flight stability while compacting the overall structure. The coaxial arrangement with one motor inside another reduces the radial extension needed, making the UAV more compact and easier to handle and store without sacrificing flight control capabilities.
Solution Approach 2:
The patent divides the motor system into separate, independently controllable motor modules. Each motor module can be independently controlled to drive its associated propeller, allowing for precise flight stability control. This segmentation enables the system to achieve stable flight while maintaining a compact structure that is easier to handle and store compared to conventional extended arrangements.
3Stability of the object's composition
If multiple motor modules are arranged to drive independent propellers, then flight control and stability are improved, but the device size and complexity increase
Solution Approach 1:
The nested arrangement of motor modules reduces device complexity by optimizing space utilization. Instead of requiring separate mounting structures and larger housing for multiple motors, the coaxial nested configuration allows motor modules to share the same spatial envelope, reducing the overall structural complexity and number of components needed to support multiple independently controlled propellers.
Solution Approach 2:
The patent merges multiple motor modules into a single integrated coaxial assembly. The first and second motor modules are combined in a nested configuration, sharing common structural elements and mounting interfaces. This merging approach maintains the independent control capability of each motor while reducing the overall device complexity compared to having separate, distributed motor assemblies.
Data Source
AI summary
A propeller driving unit for an unmanned aerial vehicle (UAV). The propeller driving unit comprises a motor unit comprising a first motor module and a second motor module, with the first motor module being adapted to independently drive a first propeller or a first set of propellers, the second motor module being adapted to independently drive a second propeller or a second set of propellers; wherein the first and second motor modules are coaxially arranged within the motor unit. The invention also relates to an unmanned aerial vehicle comprising the described propeller driving unit.