Wireless Power Transmitter Damping Circuit for In-Band Data Fidelity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless power transfer systems face challenges in achieving high power transfer levels while maintaining communication fidelity, especially at high frequencies, due to inefficiencies and interference caused by additional antennas and circuitry.

Innovation Solution

The implementation of a damping circuit in wireless transmission systems, which includes components like damping diodes, capacitors, and resistors, to reduce rise and fall times during signal transmission, thereby enhancing data rates and ranges without degrading communication standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional antennas and circuitry are used for simultaneous wireless power and data transfer, then communication functionality is improved, but device complexity and cost increase

Engineering Contradiction:

Improvecommunication functionalityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines wireless power transfer and data communication functions into a single antenna system. The same antenna used for power transfer also handles bidirectional communication, eliminating the need for separate communication antennas and reducing overall device complexity while maintaining full communication functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The communication circuit is designed to perform multiple functions: it enables bidirectional communication during power transfer, provides device discovery, and facilitates power negotiation. This multi-functional approach allows a single communication subsystem to replace what would traditionally require multiple dedicated components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If additional antennas are used for communication, then data transfer capability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvedata transfer capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent merges the communication antenna function with the power transfer antenna, eliminating the need for additional antenna components. This reduction in component count directly lowers bill of materials costs and simplifies the manufacturing assembly process while maintaining adequate data transfer capability through the shared antenna.

Inventive Principle:

Principle #5Merging (Combining)

3Power

If higher power levels are transmitted, then power transfer efficiency is improved, but communication fidelity deteriorates due to harmonic distortion

Engineering Contradiction:

Improvepower transfer levelVSAvoidcommunication fidelity

Core Design Contradiction:

PowerVSLoss of information

Solution Approach 1:

The patent employs periodic modulation of the power transfer signal to encode communication data. By using amplitude modulation where data is conveyed through periodic variations in the power signal envelope, the system maintains high power transfer levels while embedding communication information that remains readable despite the presence of harmonic distortion.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The communication circuit acts as an intermediary that extracts and decodes data from the modulated power signal. It uses signal processing techniques to separate the embedded communication data from the power transfer signal and its harmonics, maintaining communication fidelity even at elevated power levels where traditional separate antennas would suffer from interference.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This approach allows for higher power wireless power transfer beyond 300 mW while ensuring data communications remain compliant and efficient, even at elevated power levels, thus overcoming the limitations of legacy systems.

Implementation Method 1

an amplifier that includes a damping circuit configured for damping the AC wireless signal during transmission of the AC wireless signal and data signals

Methodology Applied

Scientific EffectDamping: Damping

Implementation Method 2

The amplifier includes at least one transistor that is configured to receive the driving signal at a gate of the at least one transistor and invert the DC input power signal to generate the AC wireless signal at the operating frequency

Methodology Applied

Scientific EffectElectrical signal inversion:

Implementation Method 3

wireless transfer of electrical power and/or electrical data signals

Methodology Applied

Scientific EffectElectromagnetic radiation:

Data Source

PatentUS20250192620A1Wireless Power Transmitter for High Fidelity Communications and High Power Transfer

Publication Date: 2025.06.12 NUCURRENT INC

AI summary

Wireless power transfer systems, disclosed, include one or more circuits to facilitate high power transfer at high frequencies. Such wireless power transfer systems include a damping circuit, configured to dampen a wireless power signal such that communications fidelity is upheld at high power. The damping circuit includes at least a damping transistor that is configured to receive, from the transmitter controller, a damping signal for switching the transistor to control damping during transmission of the wireless data signals. Utilizing such systems enables wireless power transfer at high frequency, such as 13.56 MHz, at voltages over 1 Watt, while maintaining fidelity of in-band communications associated with the higher power wireless power signal.