Wireless Power Transfer Profiles With Feedback-Based Charging Control

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Solution Overview

Problem

The efficiency of wireless charging systems varies based on various conditions, necessitating the need for adaptive power transfer profiles to optimize charging efficiency.

Innovation Solution

An electronic device with a wireless power transfer coil, inverter, and control circuitry that adjusts power transfer profiles based on received power information from the receiving device to determine an optimum power transfer profile.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a fixed power transfer profile is used for wireless charging, then the system operation is simple, but the charging efficiency varies and cannot be optimized for different conditions

Engineering Contradiction:

Improvecharging efficiencyVSAvoidsystem operation complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent implements dynamic power transfer profiles that adjust charging parameters in real-time based on received power information from the receiving device. The transmitting device monitors power transfer conditions and dynamically modifies the power transfer profile to optimize efficiency, transforming the static system into an adaptive one that responds to changing operating conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs feedback mechanisms where the receiving device sends received power information back to the transmitting device. This feedback loop enables the transmitting device to assess actual power transfer efficiency and adjust the power transfer profile accordingly, creating a closed-loop control system that continuously optimizes charging performance.

Inventive Principle:

Principle #23Feedback

2Loss of energy

If adaptive power transfer profiles are implemented to optimize charging efficiency, then energy loss is reduced, but device complexity increases due to additional control circuitry and communication protocols

Engineering Contradiction:

Improvepower transfer efficiencyVSAvoidcontrol circuitry complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into the control circuitry of the wireless power transmitting device. The same control circuitry that manages power transfer also processes communication packets, monitors power information, and adjusts operational parameters. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent optimizes power transfer efficiency by changing operational parameters such as frequency, power level, and timing based on received power information. Instead of adding complex hardware, the system achieves optimization through software-based parameter adjustments, which are implemented through existing control circuitry and require minimal additional complexity.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If real-time monitoring and adjustment of power transfer profiles is performed, then charging efficiency is maximized, but the communication overhead between devices increases

Engineering Contradiction:

Improvecharging speedVSAvoidcommunication overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent combines power transfer and communication functions into a unified system. Communication packets are transmitted and received during the power transfer process itself, utilizing the existing electromagnetic coupling between transmitting and receiving coils. This merging of functions eliminates the need for separate communication channels and reduces overall communication overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent maintains continuous power transfer while simultaneously exchanging communication packets. Rather than interrupting power transfer for communication or vice versa, the system performs both operations concurrently, ensuring that charging continues without interruption while necessary data exchange occurs within the power transfer framework.

Inventive Principle:

Principle #20Continuity of useful action

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

Enhances charging efficiency by dynamically adjusting power transfer profiles to match real-time operating conditions, improving overall system performance.

Implementation Method 1

a wireless power transmitting device transmits wireless power to a wireless power receiving device

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250364845A1Determining Power Transfer Profiles for Wireless Power Transfer Devices

Publication Date: 2025.11.27 APPLE INC

AI summary

A wireless charging system may include a wireless power receiving device that receives wireless power signals from a wireless power transmitting device. The wireless power receiving device may transmit received power information to the wireless power transmitting device. The wireless power transmitting device may determine a recommended power transfer profile using at least the received power information. The wireless power transmitting device may transmit the recommended power transfer profile to the wireless power receiving device.