Power Adapter Detection of Aircraft In-Seat Power Limits
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Solution Overview
Problem
Existing power adaptors designed for high-capacity devices like high-end performance laptops fail to detect aircraft in-seat power sources, leading to potential circuit breaker tripping and power disruptions due to insufficient power capacity, which is typically limited to 60-100 Watts compared to standard AC power receptacles' 1350 Watts.
Innovation Solution
A power adaptor equipped with a controller that detects voltage distortions during the boost phase of power factor correction to identify underpowered aircraft in-seat power sources, renegotiating lower power limits with the load device to prevent excessive current draw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power adaptor is designed for high-capacity devices with standard AC power receptacles (1350 Watts), then the power delivery capability is improved, but the risk of circuit breaker tripping increases when connected to aircraft in-seat power sources (60-100 Watts)
Solution Approach 1:
The controller performs preliminary detection of voltage distortion during the boost phase before full power delivery is established. By detecting the characteristic voltage distortion pattern that indicates an aircraft power source, the system takes preliminary action to identify the power source type and adjust operating parameters accordingly, preventing the harmful effect of circuit breaker tripping before it occurs
Solution Approach 2:
The system dynamically adjusts its operation based on the detected power source characteristics. When voltage distortion indicating an aircraft power source is detected, the controller modifies the power delivery parameters to match the lower capacity of the aircraft power source, enabling the power adaptor to adapt its power delivery capability from high-capacity (1350 Watts) to aircraft-appropriate levels (60-100 Watts)
2Power
If the power adaptor draws high current to meet high-end device power requirements, then the power delivery capability is improved, but the harmful effect of excessive current draw on aircraft power sources occurs
Solution Approach 1:
The controller continuously monitors the input voltage during the boost phase and detects the characteristic voltage distortion that feedback from an aircraft power source under load. This feedback mechanism allows the system to identify when it is connected to an aircraft power source and adjust the current draw accordingly, preventing excessive current draw while maintaining optimal power delivery to the connected device
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
Enables the power adaptor to safely operate with low-capacity aircraft power sources by detecting voltage distortions, preventing circuit breaker tripping and ensuring stable power delivery to connected devices.
Implementation Method 1
The power adaptor may include a bulk capacitor and a controller. The controller may detect a voltage level of input power from the power source, charge the bulk capacitor, detect a distortion of the voltage level in response to charging the bulk capacitor
Data Source
AI summary
A power adaptor provides power from a power source to a load device. The power adaptor includes a bulk capacitor and a controller. The controller detects a voltage level of input power from the power source, charges the bulk capacitor, detects a distortion of the voltage level in response to charging the bulk capacitor, and sets an output power limit for the power adaptor from a maximum output power limit for the power adaptor to a reduced output power limit in response to detecting the distortion.