Motor Controller Reset Logic for Aircraft Power Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern aircraft power systems, which employ direct current (DC) buses and AC to DC power conversion, face challenges in protecting components from undesired conditions due to differences from traditional systems, leading to potential saturation of magnetic devices and degraded power quality.
Innovation Solution
A method and apparatus that include a condition detector and controller to identify and manage undesired conditions in the power system, such as unbalanced voltage, by disconnecting the power converter from the AC bus if conditions persist beyond a time delay, and reconnecting when conditions normalize, while resetting motor controllers if tripped conditions meet specific thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional aircraft power system protection methods are used, then protection is provided for traditional systems, but they do not provide desired protection for modern aircraft power systems with DC buses and AC to DC power conversion
Solution Approach 1:
The patent modifies protection parameters and thresholds to accommodate modern aircraft power systems with DC buses and AC to DC power conversion. The system adjusts voltage and current thresholds specifically for these modern configurations, enabling reliable protection while adapting to new system architectures that differ from traditional aircraft power systems.
2Reliability
If the power converter is disconnected from the AC bus when undesired conditions occur, then protection is provided for the power system, but unnecessary load interruptions may occur
Solution Approach 1:
The patent applies protection measures locally rather than system-wide. When undesired conditions are detected, the system selectively disconnects only the specific component or zone where the fault exists, rather than disconnecting the entire power system. This localized approach maintains power supply to unaffected loads while providing necessary protection.
Solution Approach 2:
The protection system dynamically adjusts its response based on real-time system conditions. Rather than using fixed disconnection thresholds, the system continuously monitors voltage, current, and other parameters, adjusting protection levels and disconnection decisions dynamically to distinguish between transient anomalies requiring protection and normal variations that should maintain load continuity.
3Productivity
If motor controllers are reset after tripping, then operational continuity is improved, but resetting may be inappropriate if accompanied by persistent undesired conditions
Solution Approach 1:
The patent implements a feedback mechanism that monitors system conditions before allowing motor controller reset. After a motor controller trips, the system continuously checks whether undesired conditions persist. Only when the feedback indicates that conditions have normalized does the system permit resetting, ensuring that reset actions are taken only when safe and appropriate.
Solution Approach 2:
Before resetting the motor controller, the system performs preliminary checks to verify that undesired conditions have cleared. This preliminary verification action prevents premature resetting that could occur during persistent fault conditions, ensuring that reset operations are preceded by confirmation of system safety.
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
This approach provides robust and coordinated protection for aircraft power systems, preventing unnecessary load interruptions and ensuring safe operation by isolating the affected area, thus minimizing the impact on other parts of the system.
Implementation Method 1
The power converter converts the alternating current power on the alternating current bus to direct current power on the direct current bus
Data Source
AI summary
An apparatus and method for resetting a motor controller. It is determined whether a tripping of the motor controller is accompanied by an undesired condition elsewhere in a power system wherein an alternating current bus receives alternating current power from a generator, a power converter converts the alternating current power on the alternating current bus to direct current power on a direct current bus, and the direct current power on the direct current bus powers the motor controller. In response to a determination that the tripping of the motor controller is accompanied by the undesired condition, it is determined whether the undesired condition is less than a threshold for more than a time delay. The motor controller is reset in response to a determination that the undesired condition is less than the threshold for more than the time delay.