Coreless Transformer Four-Coil Magnetic Coupling
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Solution Overview
Problem
Traditional power transformers are costly and heavy due to their steel core and copper windings, necessitating a more efficient design for power transmission and distribution.
Innovation Solution
A four-coil ensemble system with fixed spacing geometry, comprising a drive coil, primary resonant coil, secondary resonant coil, and load coil, where energy is transferred magnetically without a core, utilizing scaling parameters to optimize coupling and achieve a pre-defined transmission coefficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a steel core is used in traditional power transformers, then magnetic coupling and energy transfer efficiency are improved, but the device becomes heavy and expensive
Solution Approach 1:
The patent removes the steel core from the transformer design, extracting the heavy magnetic core component while maintaining energy transfer functionality through alternative means (magnetic coupling between coils). This directly addresses the contradiction by eliminating the source of weight while preserving the essential energy transfer function.
Solution Approach 2:
The patent replaces the mechanical steel core structure with a magnetic field-based coupling system between coils. Instead of relying on physical magnetic core material, the system uses electromagnetic induction and magnetic coupling between the primary and secondary coils to achieve energy transfer, substituting a mechanical structure with a field-based mechanism.
2Power
If a steel core and copper windings are used in traditional power transformers, then power transmission capability is improved, but the device becomes costly and heavy
Solution Approach 1:
The patent extracts and eliminates the expensive steel core and heavy copper windings from the traditional transformer design. By removing these costly materials, the invention significantly reduces manufacturing costs while maintaining power transmission capability through the coil-based magnetic coupling system.
Solution Approach 2:
The patent changes the fundamental parameters of the transformer design by operating at high frequencies (e.g., 6.78 MHz) and using different coil configurations (number of turns, dimensions, spacing). These parameter changes enable power transmission without requiring traditional heavy materials, thereby reducing cost while maintaining functionality.
3Reliability
If traditional transformer designs are used, then magnetic coupling is achieved, but the device becomes heavy and expensive
Solution Approach 1:
The patent replaces the mechanical steel core that provides magnetic coupling with an electromagnetic field-based coupling system. The magnetic coupling reliability is maintained through optimized coil designs, proper spacing, and high-frequency operation, while eliminating the heavy steel core structure.
Solution Approach 2:
The patent employs dynamic optimization of the magnetic coupling system by adjusting coil parameters (number of turns, dimensions, spacing) and operating frequency to maximize coupling efficiency. This dynamic approach ensures reliable magnetic coupling without requiring static heavy structural support from a steel core.
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
This coreless transformer design enhances efficiency and reduces costs by optimizing energy transfer between coils, achieving high transmission coefficients and efficient power handling without the need for a magnetic core, as demonstrated by simulations and measurements up to 400 kHz.
Implementation Method 1
the drive coil producing magnetic fields and the primary resonant coil being magnetically coupled to the drive coil
Implementation Method 2
the primary resonant coil being magnetically coupled to the drive coil producing energy that is stored by the primary resonant coil
Implementation Method 3
the secondary resonant coil being magnetically coupled to the primary resonant coil to propagate the energy stored in the primary resonant coil to the secondary resonant coil without using a magnetic core
Implementation Method 4
the secondary resonant coil is then magnetically coupled to the load coil where the energy is transferred to the load coil
Data Source
AI summary
A transformer system is provided that includes an ensemble of four magnetically coupled coils having fixed spacing geometry. The ensemble of four magnetically coupled coils includes a load coil, a primary resonant coil, a drive coil and a secondary resonant coil. All coils are coupled in the transformer system, but the first resonant coil is highly coupled with the drive coil so that the resonant coil can receive energy from the drive coil and the second resonant coil is highly coupled to the load coil so that the load coil can extract energy efficiently from the second resonant coil. Additionally, the primary resonant coil may be at least partially nested coaxially inside the drive coil and/or the secondary resonant coil may be at least partially nested coaxially inside the load coil.