Non-contact Power Transmission Device With Segmented Magnetic Core
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing non-contact power transmission technologies face inefficiencies in core distance maintenance and limited application range, with transformer designs lacking flexibility in leakage inductance and coupling ratio design, resulting in low efficiency and limited load conditions.
Innovation Solution
A non-contact power transmission device with a transformer having a primary and secondary circuit with divided windings and switching elements, capacitors, and adjustable coupling ratios, using a convex and concave core configuration to enhance electromagnetic coupling, allowing for flexible design and high output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-contact power supply device uses a primary unit and secondary unit of a coupling transformer made separable, then power can be supplied non-contact to a load connected to the secondary unit, but it is difficult to maintain efficiency with respect to the distance between the cores
Solution Approach 1:
The invention divides the transformer into separable primary and secondary units with engageable convex and concave cores. This segmentation enables non-contact power supply while maintaining efficient coupling when engaged, resolving the contradiction between operational ease and energy loss by allowing separation when not in use but ensuring tight coupling when connected.
Solution Approach 2:
The invention employs asymmetric convex and concave core shapes that engage with each other to maintain precise alignment and optimal coupling ratio. This asymmetric design ensures that even when separated and reconnected, the cores maintain consistent positioning, thereby maintaining transmission efficiency while enabling non-contact operation.
2Loss of energy
If the transformer part of the resonant converter is used as a connector, then the efficiency may be increased, but the load conditions are limited and the range of application is limited
Solution Approach 1:
The invention incorporates variable coupling ratio capability through the engageable core design, allowing the transformer to adapt to different load conditions dynamically. The coupling ratio can be adjusted by changing the engagement depth or position of the convex and concave cores, enabling efficient operation across a wide range of load conditions rather than being limited to fixed resonant frequencies.
Solution Approach 2:
The invention enables changeable coupling ratios as a key parameter, allowing the transformer to optimize performance for different applications and load conditions. By varying the coupling ratio through the engageable core mechanism, the system can maintain high efficiency across diverse operating conditions, expanding the range of applicable loads beyond fixed resonant converters.
3Ease of manufacture
If the transformer structure is applied to the circuit, then the degree of freedom in designing the leakage inductance is low, but the degree of freedom for application is also low
Solution Approach 1:
The separable primary and secondary units with engageable cores allow independent design and optimization of each unit's inductance characteristics. This segmentation provides greater freedom in designing leakage inductance for each unit while maintaining overall system flexibility for various applications, resolving the contradiction between manufacturing ease and application versatility.
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 solution enables safe and efficient power transmission while preventing short circuits and system deterioration, offering a versatile power transmission system with improved coupling ratios and high output capabilities.
Implementation Method 1
a primary circuit for supplying power and a secondary circuit for supplying power supplied from the primary circuit, to a load are coupled via a transformer
Implementation Method 2
the transformer preferably includes a convex core and a concave core having shapes engageable to each other
Data Source
AI summary
A non-contact power transmission device is configured with which a primary circuit that supplies power and a secondary circuit that supplies the power supplied from the primary circuit to a load are coupled via a transformer, the non-contact power transmission device capable of connecting a storage battery and an application using the primary circuit and the secondary circuit.