Electric Drive Control for Rotary Blade Locking and Idle Rotation
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Solution Overview
Problem
There is a need for a technique to lock rotary blades or screws in a specific angle range to address issues such as air resistance and idle rotation in electric vertical take-off and landing aircraft, as well as other applications like ships with electric drive systems.
Innovation Solution
A control device with a lock control unit is provided to lock the rotation of rotating bodies within a set lock angle range, using a lock control unit, angle acquisition unit, and pulse output unit to manage the rotation of rotary blades and screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If rotary blades are allowed to rotate freely when not in use, then the structure remains simple, but air resistance increases and efficiency deteriorates
Solution Approach 1:
The lock control unit performs preliminary locking action when the rotating body is not in use, positioning it at a predetermined angle before operation. This preliminary positioning prevents idle rotation and reduces air resistance, while the control unit integrates the locking function without adding complex mechanical structures.
Solution Approach 2:
The patent replaces complex mechanical locking mechanisms with an electrical control system. The lock control unit uses electrical signals to control the motor, which automatically positions and locks the rotating body at the predetermined angle, eliminating the need for complex mechanical locks while reducing air resistance.
2Measurement precision
If detection units are added to precisely control rotation locking, then rotation control precision improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The control device utilizes the motor's own position feedback mechanisms and control algorithms to achieve precise rotation locking without adding external detection units. The motor controller internally calculates and adjusts the rotation angle based on operational signals, allowing the system to self-regulate and lock at the predetermined angle while maintaining simplicity.
Solution Approach 2:
The motor and control unit serve multiple functions: they drive the rotating body during operation and simultaneously control its positioning and locking when not in use. This multi-functionality eliminates the need for separate detection and locking mechanisms, achieving precise rotation control without increasing device complexity.
Data Source
AI summary
A control device of an electric drive system for rotationally driving one of a rotary blade and a screw that are a rotating body. The control device has an angle acquisition unit configured to acquire an angle of the rotating body, and a lock control unit configured to lock a rotation of the rotating body within a set lock angle range based on the acquired angle by the angle acquisition unit.