Wireless Power Transfer System with Adaptive Induction Resonance Switching
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Solution Overview
Problem
Existing wireless power transfer systems face challenges with contact terminals getting contaminated or short-circuited due to moisture, leading to charging errors, and require separate systems for magnetic induction and resonance schemes, which increases complexity and costs.
Innovation Solution
A wireless power transfer system-charger with a single power converting unit that controls both induction and resonance coils, allowing for adaptive frequency switching between magnetic induction and resonance schemes, reducing circuit complexity and improving competitiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate systems are used for magnetic induction and resonance schemes, then each scheme can be optimized independently, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines separate magnetic induction and resonance charging systems into a single integrated wireless power transfer system. The charger includes both an induction coil and a resonance coil that share common components including the power converting unit, control unit, and housing structure. This merging eliminates the need for separate independent systems while maintaining the ability to provide both induction and resonance charging functions through a unified device architecture.
Solution Approach 2:
The integrated charger is designed to perform multiple functions using a single device. The power converting unit can operate in different modes to support both magnetic induction charging and magnetic resonance charging. The control unit selectively activates either the induction coil or the resonance coil based on the charging requirements, making the single charger universal enough to handle various charging schemes without requiring separate dedicated systems for each function.
2Ease of operation
If contact terminals are exposed for charging connection, then charging connection is straightforward, but contamination and short-circuiting occur due to moisture
Solution Approach 1:
The patent replaces the mechanical contact-based charging system with a wireless power transfer system. Instead of requiring physical contact between charging terminals that are susceptible to moisture and contamination, the system uses electromagnetic fields for power transfer. The charger includes wireless transmission components (induction coil and resonance coil) that eliminate the need for exposed contact terminals, thereby maintaining charging convenience while eliminating the reliability issues associated with contact terminal contamination.
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 efficient and cost-effective wireless power transfer by simplifying the circuit design, reducing yield and price barriers, and ensuring reliable charging across different schemes.
Implementation Method 1
a power converting unit to convert a DC signal into an AC signal
Implementation Method 2
The magnetic induction scheme, which is a contactless energy transmission technique which generates electromotive force at one coil through the medium of a magnetic flux generated by allowing two coils to approach closely to each other and current to flow through the other coil
Implementation Method 3
The magnetic resonance scheme, which is a magnetic resonance technique which uses an electric or magnetic field without using any electromagnetic waves or electric currents
Implementation Method 4
the resonance-type antenna system is operated at an operating frequency which is determined by the induction coil and the parasitic capacitor connected in parallel to the induction coil
Data Source
AI summary
Disclosed is a wireless power transfer system-charger for wireless power transmission. The wireless power transfer system-charger includes: a power converting unit to convert a DC signal into an AC signal; a control unit to control the power converting unit with a first or second operating frequency; and an induction-type antenna system and a resonance-type antenna system connected in parallel to each other, wherein power is transmitted through the induction-type antenna system or the resonance-type antenna system according to a control of the control unit.