Lead-Unity-Lag Power Factor Adjustment for Aerospace Generators
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Solution Overview
Problem
Modern aerospace and military power generation systems face challenges in increasing power density, reducing system losses, weight, and volume, while meeting new electrical power quality and electromagnetic interference requirements, particularly in the transition to more electric architectures.
Innovation Solution
A method and system employing lead-unity-lag power factor adjustment, which involves defining standard parameters, determining a power factor angle, calculating a unity power factor point, and adjusting operation parameters to shift the power factor angle, thereby optimizing power generation efficiency and reducing operational power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power generation capacity is increased to meet higher electrical power needs, then power output increases, but system losses and weight increase
Solution Approach 1:
The patent changes the operating parameters of the power generation system by adjusting the power factor angle through controller modification. This allows the system to operate at optimized power factor angles that reduce system losses while maintaining required power output levels, directly addressing the contradiction between power output and system losses
2Power
If power generation capacity is increased to meet higher electrical power needs, then power output increases, but weight and volume increase
Solution Approach 1:
By modifying the controller to adjust power factor angles, the system optimizes its operating parameters to achieve higher power density. This allows increased power output without proportional increases in weight and volume, as the optimization improves the ratio of power output to system mass
3Loss of energy
If power factor angle is adjusted to optimize efficiency, then operational power decreases, but current requirements increase
Solution Approach 1:
The patent adjusts the power factor angle parameter to optimize the balance between operational power and current requirements. The controller modification enables dynamic adjustment of this parameter to find the optimal operating point that minimizes operational power while maintaining acceptable current levels
Data Source
AI summary
A method employing a lead-unity-lag adjustment on a power generation system is disclosed. The method may include calculating a unity power factor point and adjusting system parameters to shift a power factor angle to substantially match an operating power angle creating a new unity power factor point. The method may then define operation parameters for a high reactance permanent magnet machine based on the adjusted power level.