Magnetic Rotor Locking for Drag Reduction in eVTOL Aircraft
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Solution Overview
Problem
In electric multi-propulsion systems, such as eVTOL aircraft, rotors not in use during flight generate undesirable drag, which affects efficiency and performance.
Innovation Solution
A magnetic locking system comprising a first and second magnetic component, fixedly attached to an electric aircraft rotor, with a controller to engage and disengage the lock, preventing rotor movement and thus reducing drag by locking unused propellers in optimal positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the rotor is left free to move, then the rotor can rotate freely for propulsion, but drag is generated when the rotor is not in use
Solution Approach 1:
The patent replaces traditional mechanical locking mechanisms with a magnetic locking system. The magnetic lock uses magnetic fields to engage with the rotor, providing a contactless locking mechanism that prevents rotor movement and reduces drag when the rotor is not in use, while allowing free rotation when engaged for propulsion
Solution Approach 2:
The magnetic locking system changes the operational state of the rotor by transitioning between locked and unlocked positions through magnetic field engagement. The controller activates the magnetic lock to change the rotor's parameter from free-moving to constrained, reducing drag during non-propulsion phases
2Loss of energy
If a magnetic lock is engaged to prevent rotor movement, then drag is reduced, but system complexity increases
Solution Approach 1:
The magnetic locking system extracts only the essential function needed to reduce drag - the ability to prevent rotor movement when not in use. By using a simple magnetic lock mechanism with minimal components (magnetic lock, controller, and engagement components), the system avoids the complexity of traditional mechanical locking systems while achieving the drag reduction goal
Solution Approach 2:
The magnetic lock acts as an intermediary between the controller and the rotor. Instead of directly mechanical connection, the magnetic field serves as the mediator to transmit the locking force, simplifying the overall system architecture while maintaining effective rotor control
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
The magnetic locking system effectively reduces drag by preventing movement of unused rotors, enhancing the aircraft's efficiency during flight transitions and operations.
Implementation Method 1
a magnetic lock having a first magnetic component and a second magnetic component fixedly attached to a rotor of an electric aircraft
Data Source
AI summary
A magnetic locking system and methods for restricting movement of an electric aircraft motor is provided. A locking system may include a magnetic lock, which includes a first magnetic component and a second magnetic component. First and second magnetic components may be configured to attract each other and thus lock rotor in a certain position. The first or second magnetic component may include an electromagnet so that magnetic lock may be engaged or disengaged based on one or more parameters, such as a detection by a sensor or a signal generated by a controller.