Hybrid Coil Structure for Wireless Power Transmission
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Solution Overview
Problem
Conventional wired charging methods for portable devices are cumbersome, occupy significant workspace, and can lead to issues like instantaneous discharge, burnout, and reduced battery performance.
Innovation Solution
A wireless power transmission apparatus utilizing a hybrid type coil structure that combines a primary resonant coil and a primary inductive coil on the same plane, enabling efficient wireless power transmission through magnetic induction and resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired charging is used to charge portable devices, then electrical energy can be supplied reliably, but cables occupy considerable workspace and deteriorate appearance
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless electromagnetic field-based power transmission system. The transmitting device generates electromagnetic fields that induce current in the portable device's receiving coil, eliminating the need for physical cable connections while maintaining reliable power transfer.
2Power
If terminal supply method with cables is used, then power can be transmitted, but instantaneous discharge and burnout may occur due to potential differences
Solution Approach 1:
The patent replaces direct electrical contact through cables with contactless electromagnetic induction. The transmitting device's coil generates a magnetic field that induces current in the portable device's coil, eliminating potential differences at connection points and preventing instantaneous discharge and burnout hazards.
3Area of stationary object
If wireless power transmission is implemented, then workspace occupation is reduced, but device complexity increases
Solution Approach 1:
The patent employs resonant frequency matching between the transmitting device's coil and the portable device's receiving coil to enhance power transfer efficiency. By operating at specific resonant frequencies, the system achieves effective wireless power transmission without requiring overly complex circuitry, balancing simplicity with performance.
4Adaptability or versatility
If wireless power transmission apparatus is designed with both inductive and resonant coils, then functionality is enhanced, but manufacturing cost increases
Solution Approach 1:
The patent designs the transmitting device with both inductive and resonant coils that can operate independently or together. This multi-functional design allows the single device to support multiple charging modes (inductive charging, resonant charging, or combined mode), enhancing adaptability to different portable devices while consolidating what would otherwise require separate charging devices.
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 allows for stable wireless power transmission while minimizing volume and cost, and enables independent implementation of induction-based and resonance-based charging by incorporating a switch function.
Implementation Method 1
a first inductive coil supplying power to the primary resonant coil in a contactless form and generating at least one of magnetic induction and magnetic resonance
Implementation Method 2
generating at least one of magnetic induction and magnetic resonance by a driving signal to transmit wireless power
Data Source
AI summary
A coil structure for wireless power transmission is provided. The coil structure comprises: a primary resonance coil wound in a spiral shape around a centripetal point; a primary induction coil, which supplies power to the primary resonance coil in a nonconnected state with an input or output terminal of the primary resonance coil and is wound in a spiral shape on a substantially same plane around a substantially same centripetal point as the centripetal point; a switch configured to be parallel with the primary resonance coil so as to control the ON and OFF of an operation of the primary resonance coil; and a capacitor coupled to the primary resonance coil so as to form a magnetic resonance with the primary resonance coil.