Winding Unit Inductance Adjustment via Blank Portion
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Solution Overview
Problem
Existing non-contact power supply devices with adjustable coil turns have complex structures, leading to changes in transformation ratios and voltage applied to components, increasing costs due to the need for special winding units for each vehicle type and mounting configuration, and requiring adjustments in inductance values based on vehicle height and mounting position.
Innovation Solution
A winding unit with a simple structure that adjusts inductance values by forming a blank portion with a gap between coil turns, allowing for the control of magnetic flux passage without changing the number of turns, using a receiving portion with a movement restriction mechanism to prevent unintentional changes in inductance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of turns of coil is changed to adjust inductance value, then the resonance frequency can be adjusted, but the transformation ratio changes and the structure becomes complicated
Solution Approach 1:
The coil is divided into multiple independent coil portions (first coil portion, second coil portion, third coil portion, etc.) that can be selectively connected. Instead of changing the number of turns of a single continuous coil, the invention segments the coil into discrete portions that can be independently switched in or out of the circuit, simplifying the adjustment mechanism while maintaining the ability to change inductance values.
Solution Approach 2:
The invention introduces a dynamic switching mechanism that allows selective connection of different coil portions based on required inductance values. This dynamic reconfiguration capability enables adjustment of resonance frequency without physically changing the coil structure, maintaining simplicity while providing adaptability.
2Adaptability or versatility
If special winding units are provided for each vehicle model to adjust inductance, then power transmission characteristics can be optimized, but manufacturing cost increases
Solution Approach 1:
The invention creates a universal winding unit that can serve multiple vehicle types and mounting configurations. By using selectable coil portions with different inductance values, a single winding unit design can be adapted to various applications without requiring model-specific custom winding units, thereby reducing manufacturing costs while maintaining optimization capability.
Solution Approach 2:
Instead of creating different physical winding units for each vehicle type, the invention changes the electrical parameters (inductance values) by selectively connecting different coil portions. This parameter adjustment approach allows a single winding unit design to accommodate various vehicle types and mounting positions without increasing manufacturing complexity or cost.
3Ease of manufacture
If the coil structure is simplified to reduce manufacturing complexity, then production cost decreases, but the ability to adjust inductance value is limited
Solution Approach 1:
The coil is segmented into multiple standardized portions that can be selectively connected. This segmentation maintains manufacturing simplicity by using repetitive, standardized coil portions while providing adaptability through selective combination of these portions to achieve different total inductance values.
Solution Approach 2:
Different coil portions are designed with specific local characteristics (different inductance values) to serve different adjustment needs. Each coil portion has optimized local quality tailored to specific inductance requirements, while the overall structure remains simple and manufacturable through standardized design.
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 adjustment of inductance values without altering the number of coil turns, reducing manufacturing complexity and costs, maintaining constant wire positions, and improving the strength and size efficiency of the winding unit while ensuring desired power transmission characteristics.
Implementation Method 1
a winding portion (2) for transmitting/receiving power
Implementation Method 2
A blank portion (20) is formed between the two coil portions (22, 23) next to each other in the winding portion (2), the blank portion (20) having a gap with a dimension of at least one turn of the coil portion in the arrangement direction
Data Source
AI summary
A winding unit including a case is provided. The case has a receiving space capable of housing at least one turn of a coil portion in addition to a winding portion in a radial direction. In case, a blank portion having a dimension of one turn of the coil portion in the radial direction is formed between the two coil portions next to each other in the winding portion. When manufacturing the winding unit, the blank portion can be formed in a suitable position, and the number of turns of the winding portion (the number of coil portion) does not need to change. Further, an inductance value of the winding portion can be adjusted with simply structure.