Inductor Unit Magnetic Flux Angle Optimization
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Solution Overview
Problem
Conventional inductor units for wireless power transmission face challenges in reducing both coupling coefficient and leakage magnetic field simultaneously, leading to decreased transmission efficiency and complex power control due to magnetic coupling between inductors.
Innovation Solution
The inductor unit is designed with a specific arrangement where the angle between the magnetic flux directions of two inductors is set between 50 degrees and 70 degrees, allowing the coupling coefficient to be minimized while reducing the leakage magnetic field by generating magnetic fields in reverse phase, thus enabling efficient power transmission with reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the angle between magnetic flux directions of inductors is set to vertical (90 degrees) to suppress magnetic coupling, then the coupling coefficient decreases, but the leakage magnetic field cannot be reduced effectively
Solution Approach 1:
The patent changes the angle parameter between magnetic flux directions from conventional values (0 degrees for parallel, 90 degrees for vertical) to a specific range of 50-70 degrees. This parameter optimization simultaneously achieves minimal coupling coefficient (near zero) and effective reduction of leakage magnetic field, resolving the technical contradiction between suppressing magnetic coupling and reducing leakage field.
2Area of stationary object
If inductors are placed closer together to increase power transmission capacity, then the device size decreases, but magnetic coupling between inductors increases causing transmission efficiency loss and complex power control
Solution Approach 1:
By optimizing the magnetic flux angle parameter to 50-70 degrees, the patent enables close inductor placement without significant magnetic coupling interference. This allows compact device design while maintaining high transmission efficiency, as the minimized coupling coefficient prevents energy loss even when inductors are positioned closely together.
3Power
If multiple inductors are used to transmit large power wirelessly, then the power transmission capacity increases, but magnetic coupling causes complicated power control
Solution Approach 1:
The optimized magnetic flux angle of 50-70 degrees minimizes coupling between multiple inductors, allowing independent or simplified control of each inductor. This reduces the complexity of power control systems while maintaining the ability to transmit large power levels through multiple inductors working in parallel.
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 configuration effectively decreases the coupling coefficient to near zero, reduces leakage magnetic field, and allows for closer inductor placement, enhancing transmission efficiency and reducing positional displacement tolerance.
Implementation Method 1
an inductor unit having a plurality of inductors and a small coupling coefficient between inductors... each inductor comprises a core and a winding wound around the core
Data Source
AI summary
An inductor unit according to one embodiment includes a first inductor comprising a first core and a first winding wound around the first core; and a second inductor comprising a second core and a second winding wound around the second core. The first inductor and the second inductor are disposed so that an angle is larger than 0 degree and smaller than 90 degrees. The angle is formed by: a first straight line coupling a first intersection point of a first center line in parallel with a first magnetic flux direction of the first core and a second center line perpendicular to the first magnetic flux direction, and a second intersection point of a third center line in parallel with the second magnetic flux direction of the second core and a fourth center line perpendicular to the second magnetic flux direction; and the first center line.