Fluid-Core Electromagnetic Machine With Movable Magnetic Particles
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Solution Overview
Problem
Conventional electromagnetic devices, such as motors and generators, often utilize heavy and complex ferromagnetic cores that increase weight and reduce efficiency due to their solid construction, which limits their performance and weight reduction potential.
Innovation Solution
The use of a fluid-filled cavity within the former of the electromagnetic device, where the fluid has a relative permeability greater than air, allowing particles to move freely and align with magnetic flux, reducing the volume and weight of the core while maintaining or improving performance, and enabling uniform cooling and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional solid ferromagnetic cores are used, then structural strength and magnetic properties are maintained, but weight and complexity increase
Solution Approach 1:
The patent applies this principle by using a fluid (liquid or gas) instead of solid ferromagnetic material to fill the core cavity. The fluid contains magnetic particles that provide the necessary magnetic properties while the fluid itself being much lighter than solid ferromagnetic materials, thereby significantly reducing core weight while maintaining structural integrity through the containing structure.
Solution Approach 2:
The patent employs composite materials by combining a non-magnetic fluid with magnetic particles suspended within it. This creates a composite core material that exhibits magnetic properties similar to solid ferromagnetic materials but with dramatically reduced weight, as the fluid matrix provides bulk with minimal weight while the dispersed magnetic particles provide the required magnetic characteristics.
2Device complexity
If solid ferromagnetic materials are used, then magnetic flux density is maintained, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies parameter changes by transitioning from a solid ferromagnetic material to a fluid-based core system. This fundamental parameter change allows the core to adapt its magnetic properties dynamically while simplifying manufacturing processes. The fluid can be introduced through standard casting or injection techniques, avoiding complex assembly of laminated solid cores, thereby reducing device complexity while maintaining magnetic performance through appropriate selection of fluid and magnetic particle properties.
3Use of energy by moving object
If particles are fixed in solid core, then structural integrity is maintained, but magnetic flux alignment efficiency decreases
Solution Approach 1:
The patent applies dynamics by using a fluid medium instead of a fixed solid structure. The magnetic particles are suspended in the fluid, allowing them to move freely and dynamically align with magnetic flux lines when magnetic fields are applied. This dynamic capability enables optimal magnetic flux alignment and reduces energy losses, while the fluid containment structure maintains overall compositional stability by preventing particle escape while permitting internal particle movement.
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 fluid-filled core results in a lighter, more efficient electromagnetic device that requires less magnetic field to align particles, thus reducing current consumption and enhancing the overall performance of the electrical machine while maintaining structural integrity.
Implementation Method 1
The particles may be arranged to move freely within the cavity, so that they can move to areas of high magnetic flux and thus areas of low flux do not unnecessarily contain particles
Implementation Method 2
The fluid may comprise a ferrofluid, such as a colloidal liquid comprising ferromagnetic, or ferrimagnetic particles or nanoparticles suspended in a carrier fluid
Data Source
AI summary
The present disclosure relates to electromagnetic motors. In some disclosed embodiments, an electromagnetic motor or generator comprise a coil and a stator comprising a 3D-printed former disposed within the coil, the former comprising a cavity containing fluid particles of material in liquid or powdered form, the particles having a relative permeability which is greater than that of air. The particles are free to move and align with the magnetic field in manner according to the strength and pattern of the induced field.