Propeller Governor for Electric Synchronous Thrust Torque Control
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Solution Overview
Problem
Conventional propeller governors in aircraft maintain propeller speed by adjusting pitch to control torque, but this approach is not effective in managing torque demand in synchronous electric transmission systems, where power regulation within control, supply, and capacity limits is challenging.
Innovation Solution
A new control system where propeller pitch is adjusted based on electric current to maintain a constant current draw, using a comparator and propeller pitch actuator to regulate torque, allowing closed-loop feedback control to stabilize the system and prevent oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional propeller governor maintains propeller speed by adjusting pitch to control torque, then propeller speed is maintained, but torque demand management in synchronous electric transmission systems becomes ineffective
Solution Approach 1:
The patent inverts the conventional governor approach by not controlling propeller speed directly, but instead controlling torque demand through pitch adjustment. The governor responds to torque demand signals from the synchronous electric transmission system and adjusts propeller pitch accordingly, allowing the system to maintain speed indirectly while effectively managing torque demand within transmission limits.
Solution Approach 2:
The patent implements a feedback control mechanism where the governor receives torque demand information from the synchronous electric transmission system and continuously adjusts propeller pitch to maintain appropriate torque levels. This closed-loop feedback enables effective torque management while preserving propeller speed stability.
2Loss of energy
If synchronous electric transmission system is used, then system efficiency increases and weight decreases, but power regulation within control and supply limits becomes challenging
Solution Approach 1:
The patent introduces a specialized governor as an intermediary device between the synchronous electric transmission system and the propeller. This governor acts as a mediator that simplifies power regulation by translating complex transmission system requirements into straightforward propeller pitch adjustments, thereby reducing overall system complexity while maintaining high efficiency.
3Force
If propeller pitch is adjusted to maintain constant current draw, then torque control in synchronous motor improves, but system oscillations may occur without proper feedback control
Solution Approach 1:
The patent implements feedback control where the governor continuously monitors current draw and propeller pitch position, making real-time adjustments to maintain constant current while preventing oscillations. The feedback mechanism ensures stable torque control by detecting deviations and correcting them before they amplify into oscillations.
Data Source
AI summary
A thrust propeller variable pitch actuator is controlled by a governor that uses propeller pitch as a variable to increase or decrease torque—not to maintain the propeller speed or RPM but instead to maintain certain established electric current supplied to rotate the thrust propeller.