Wireless Power LC-LCC Circuit for Stable Coil-to-Coil Transmission

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Solution Overview

Problem

Inductive charging methods for wireless power transmission face limitations in power transmission efficiency and safety, particularly in applications beyond the mobile sector, necessitating improvements for wider commercialization and enhanced reliability.

Innovation Solution

A wireless power transmission system utilizing an LC-LCC topology circuit with a constant voltage supply unit, including capacitors and inductors, to maintain stable power supply and reduce voltage variation, ensuring reliable and safe power transmission across multiple devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If inductive charging method is used for wireless power transmission, then power can be transmitted wirelessly to electronic devices, but power transmission efficiency is limited and safety concerns arise

Engineering Contradiction:
Improvepower transmission safetyVSAvoidpower transmission efficiency
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies parameter changes by transitioning from traditional inductive charging parameters to resonant inductive coupling parameters. Specifically, the system adjusts the operating frequency to match the resonant frequency of both transmission and reception coils, and modifies the coupling coefficient by optimizing coil positioning and geometry. These parameter adjustments enable efficient power transmission over extended distances while maintaining safety through controlled magnetic field distribution.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics through adaptive control mechanisms that continuously adjust transmission parameters based on real-time conditions. The system dynamically modifies power transmission levels, frequency, and coil coupling based on load requirements and positional variations, thereby optimizing efficiency while maintaining safety constraints throughout the power transfer process.

Inventive Principle:
Principle #15Dynamics

2Length of stationary object

If inductive charging method is used, then wireless power transmission can be achieved, but transmission distance is short

Engineering Contradiction:
Improvetransmission distanceVSAvoidpower transmission stability
Core Design Contradiction:
Length of stationary objectVSReliability

Solution Approach 1:

The patent extends transmission distance by changing key parameters: operating frequency is increased to resonate at higher frequencies, coil geometry is optimized for longer-range coupling, and power levels are adjusted to maintain stable transmission over extended distances. These parameter modifications enable reliable power transmission beyond the limited range of conventional inductive charging.

Inventive Principle:
Principle #35Parameter changes

3Stability of the object's composition

If constant voltage supply unit with LC-LCC topology is used, then voltage stability is improved, but device complexity increases

Engineering Contradiction:
Improvevoltage stabilityVSAvoidcircuit complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the power supply system into distinct functional modules: rectification stage, LC-LCC resonance circuit stage, and voltage regulation stage. Each module performs a specific function and can be independently optimized or replaced. This modular segmentation achieves stable constant voltage output while managing circuit complexity through functional decomposition.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements universality by designing the constant voltage supply unit to perform multiple functions: power rectification, resonance enhancement, voltage stabilization, and adaptive regulation. The LC-LCC topology serves as a multi-functional element that simultaneously achieves resonance coupling and voltage regulation, reducing the need for separate dedicated circuits and thereby managing overall system complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 system maintains a constant voltage and current, regardless of load changes, enhancing power transmission efficiency and safety, enabling stable operation of internal circuits and reducing magnetic field leakage.

Implementation Method 1

a reception coil configured to output a first alternating current (AC) inducted from a magnetic field generated by an external electronic device

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a transmission coil configured to generate a magnetic field for wireless power transmission by a second AC constant current

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250309694A1Device and method for wireless power transmission in electronic device
Publication Date: 2025.10.02 SAMSUNG ELECTRONICS CO LTD
  • US20250309694A1 patent drawing
  • US20250309694A1 patent drawing
  • US20250309694A1 patent drawing

AI summary

A device and method for providing wireless power transmission in an electronic device are provided. To connect a transmitting coil with a receiving coil of the electronic device, a constant voltage supply unit may be configured such that a first capacitor, an inductor, and a second capacitor are arranged to connect an output terminal of the receiving coil and an input terminal of the transmitting coil in series, and a third capacitor may be arranged between the inductor and the second capacitor to connect the inductor and the second capacitor to the ground.