Variable Magnetic Field Formation via Intersecting Power-Supplying Coils
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Solution Overview
Problem
Existing wireless power transmission systems focus on improving power transmission efficiency but lack the capability to form a magnetic field at a predetermined region, which limits the flexibility and control over magnetic field strength.
Innovation Solution
A magnetic field formation device that generates a variable magnetic field at a predetermined region using power-supplying coils and resonators, with adjustable coil orientations and a current output controller to manage current distribution and timing, allowing for high or low magnetic field strength formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple power-supplying coils are arranged with intersecting coil surface directions to form a variable magnetic field at a predetermined region, then the magnetic field strength and distribution can be controlled and enhanced, but the device complexity and structural arrangement become more complex
Solution Approach 1:
The magnetic field generation system is segmented into multiple independent power-supplying coils (first, second, and third coils) with different orientations. Each coil contributes to the magnetic field in a specific direction, allowing the magnetic field strength at the predetermined region to be controlled by adjusting individual coil parameters while maintaining manageable modular complexity
Solution Approach 2:
Different regions of space are provided with different magnetic field strengths by arranging coils with intersecting orientations. The first coil provides magnetic field in a first direction, the second coil in a second direction intersecting the first, and the third coil in a third direction intersecting both, creating localized variations in magnetic field strength and direction at the predetermined region
2Adaptability or versatility
If the coil surface directions of power-supplying coils are adjusted to control magnetic field distribution, then the magnetic field can be formed at specific regions with desired strength, but the ease of manufacture and assembly is reduced
Solution Approach 1:
The system provides dynamic control over magnetic field characteristics by enabling independent adjustment of each coil's current magnitude and direction. The coil surface directions are fixed in structure but the effective magnetic field contribution can be dynamically adjusted through current control, allowing flexible magnetic field formation while maintaining fixed structural orientations for easier manufacturing
3Use of energy by moving object
If power is transmitted wirelessly through electromagnetic induction or magnetic field resonance, then power transmission efficiency can be improved, but the capability to form magnetic field at predetermined regions with controlled strength is lost
Solution Approach 1:
The system changes multiple parameters simultaneously - using multiple coils with different orientations, adjusting current magnitudes and directions in each coil, and controlling the phase relationships between coils. These parameter changes enable both efficient wireless power transmission through magnetic field resonance and the capability to form magnetic fields at predetermined regions with controlled strength and direction
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 formation of variable magnetic fields with controlled strength at specific regions, enhancing magnetic field strength and efficiency while considering heat generation and power consumption, ensuring stable power delivery even during switching and stop processes.
Implementation Method 1
power-supplying coils configured to generate an induced current in the at least one power supplying resonator
Implementation Method 2
at least one power supplying resonator configured to generate the variable magnetic field
Data Source
Figure 1~2
Figure 3A~3B
Figure 4
AI summary
A magnetic field is formed at a predetermined region. A magnetic field formation device configured to generate a variable magnetic field at a predetermined region A includes: at least one power supplying resonator 121 configured to generate the variable magnetic field; and power-supplying coils 111 and 112 configured to generate an induced current in the at least one power supplying resonator 121, all of the power-supplying coils 111 and 112 and the at least one power supplying resonator 121 being disposed so that coil surfaces 111a, 112a, and 121a oppose the predetermined region A, and at least one of the power-supplying coils 111 and 112 being disposed to have a coil surface direction which intersects with coil surface directions of the other power-supplying coils 111 and 112.