Linear Magnetic Core Multi-Pulse Electromagnetic Device
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Solution Overview
Problem
Electrical power transformers used in airplanes, such as transformer rectifier units and auto-transformer units, are heavy and generate significant thermal emissions, which reduce payload capacity and complicate engine compartment design and thermal management.
Innovation Solution
A multi-pulse electromagnetic device with a linear magnetic core configuration, featuring an elongated core with channels and an inner core member, where a primary winding generates a magnetic field that induces current in secondary windings, optimized for efficient power transformation with minimal weight and thermal emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional transformer core designs are used, then power transformation function is achieved, but weight increases and thermal emissions increase
Solution Approach 1:
The transformer core is divided into multiple discrete laminations stacked together to form the magnetic circuit. Each lamination is electrically insulated from others, creating a segmented structure that reduces eddy current losses and thermal emissions while maintaining magnetic flux pathways for power transformation
Solution Approach 2:
The core uses composite construction combining magnetic steel laminations with non-magnetic structural supports and insulation materials. This composite approach optimizes the balance between magnetic performance, mechanical strength, and thermal management, reducing overall weight and thermal emissions
2Power
If larger transformer components are used to handle power transformation, then power capacity increases, but payload capacity of airplane decreases
Solution Approach 1:
The design changes key parameters including using high-permeability magnetic materials to increase flux density, optimizing lamination thickness to reduce losses, and configuring the magnetic circuit geometry to maximize power capacity per unit weight, thereby increasing power transformation capacity while minimizing weight impact on payload
3Reliability
If conventional transformer core configuration is used, then magnetic flux is generated, but thermal management complexity increases
Solution Approach 1:
Heat-generating components and high-flux-density regions are extracted and isolated from the main core structure, allowing separate thermal management pathways. Critical magnetic flux pathways are separated from thermal management systems, simplifying the overall thermal control architecture while maintaining reliable flux generation
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
The solution enables efficient electrical power transformation with reduced weight and thermal emissions, enhancing airplane payload capacity and simplifying thermal management.
Implementation Method 1
An electric current flowing through the primary winding generates a magnetic field about the primary winding. The magnetic field is absorbed by the elongated core to generate the magnetic flux in the elongated core.
Implementation Method 2
The magnetic flux flowing in the elongated core causes an electric current to flow in each of the plurality of secondary windings.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An electromagnetic device may include an elongated core in which a magnetic flux in generable. The electromagnetic device may also include a first channel formed through the elongated core and a second channel formed through the elongated core. An inner core member is provided between the first channel and the second channel. The electromagnetic device may also include a primary winding wound around the inner core member and a plurality of secondary windings wound around the inner core member. An electric current flowing through the primary winding generates a magnetic field about the primary winding and the magnetic field is absorbed by the elongated core to generate the magnetic flux in the elongated core. The magnetic flux flowing in the elongated core causes an electric current to flow in each of the plurality of secondary windings.