Aircraft Cabin Power Conversion for Phase-Balanced Seat Distribution

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Solution Overview

Problem

Aircraft power distribution systems require seat/row-specific power supplies, increasing volume and weight, and suffer from phase imbalance leading to generator control unit difficulties and circuit tripping.

Innovation Solution

A converter unit receives high-frequency aircraft current and outputs a single or dual phase current with phase balancing, distributing it directly to power outlets without local power supplies, and optionally converting to direct current for USB ports using intelligent AC power outlet units or simple power supplies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If seat/row-specific power supplies are installed at each seat group to distribute power to entertainment units and power outlets, then power distribution capability is improved, but the overall volume and weight of the system increase

Engineering Contradiction:

Improvepower distribution capabilityVSAvoidsystem weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of stationary object

Solution Approach 1:

The patent consolidates multiple power supply functions into a single centralized power supply unit. This central unit performs both AC power conversion (from 115VAC to 110VAC at 50Hz) and DC power conversion (to 5-28VDC) that were previously distributed across multiple seat-specific power supplies. The merged architecture eliminates redundant components and reduces overall system weight while maintaining full power distribution capability to all seats through optimized wiring.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The centralized power supply unit is designed to perform multiple functions that were previously distributed: it converts aircraft 115VAC to both 110VAC for AC outlets and 5-28VDC for USB outlets and entertainment units. This universal power supply serves the entire cabin rather than requiring dedicated power supplies at each seat, achieving multi-functionality in a single location.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

Engineering Contradiction:

Improvepower distribution capabilityVSAvoidsystem volume

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The patent consolidates multiple power supply functions into a single centralized power supply unit. This central unit performs both AC power conversion (from 115VAC to 110VAC at 50Hz) and DC power conversion (to 5-28VDC) that were previously distributed across multiple seat-specific power supplies. The merged architecture eliminates redundant components and reduces overall system volume while maintaining full power distribution capability to all seats through optimized wiring.

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If traditional power distribution systems are used without phase balancing, then system simplicity is maintained, but phase imbalance occurs leading to generator control unit difficulties and circuit tripping

Engineering Contradiction:

Improvesystem simplicityVSAvoidsystem reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent incorporates a phase balancing mechanism in the centralized power supply that actively monitors and balances the three phases of 115VAC input power. The system uses feedback control to detect phase imbalances and adjusts power distribution to prevent overload on any single phase. This feedback-based phase balancing prevents generator control unit issues and circuit tripping while maintaining system reliability, with the added complexity being localized to the single central unit rather than distributed throughout the cabin.

Inventive Principle:

Principle #23Feedback

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

Reduces the need for seat/row-specific power supplies, minimizing volume and weight, and prevents phase overload, simplifying development and regulatory processes, while ensuring efficient power distribution to passenger devices.

Implementation Method 1

a converter unit in electrical communication with an aircraft power source and configured to receive an aircraft current from the aircraft power source. The aircraft current generally comprises a three-phase, high-frequency alternating current

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Implementation Method 2

The converter unit described herein preferably provides phase balancing of the input aircraft current to prevent overloading downstream in the system.

Methodology Applied

Scientific EffectPhase balancing:

Data Source

PatentUS20250330023A1Cabin Power Distribution Systems and Methods

Publication Date: 2025.10.23 SAFRAN PASSENGER INNOVATIONS LLC

AI summary

Vehicle power distribution systems are described comprising one or more converter units in electrical communication with a vehicle power source. The converter unit is configured to receive a three-phase, high-frequency alternating current generated by the vehicle power source, and output a single phase or dual phase first current. Power outlets and/or data ports may be in electrical communication with the converter unit, such that they can receive the first current. The system may also have a simple power supply that can receive the first current and convert this to a second current, which can be used to power in-flight entertainment devices and other components of the vehicle.