Wireless Power Packet Timing for Accurate Power Loss Calculation

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Solution Overview

Problem

In wireless power transmission systems, accurately calculating power loss is challenging due to unsynchronized timing between the wireless power transmission and reception apparatuses, leading to inefficient resource usage and processing waste.

Innovation Solution

The system includes a method for synchronizing the timing of power loss calculation by exchanging configuration and capability packets between the apparatuses, allowing them to recognize bidirectional data stream support and coordinate power transfer phases, using timing packets to align calculation windows.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If timing synchronization is not implemented between transmission and reception apparatuses, then the system can operate with simpler timing mechanisms, but power loss calculation accuracy deteriorates

Engineering Contradiction:
Improvepower loss calculation accuracyVSAvoidtiming synchronization complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system performs preliminary timing synchronization through configuration packets and capability packets before power transfer begins. The transmission apparatus sends a timing packet that defines a calculation window, and both apparatuses align their power loss calculations to this pre-established timing framework, ensuring accurate simultaneous measurements without continuous complex synchronization overhead

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

A timing packet serves as an intermediary mechanism between the transmission and reception apparatuses. This packet carries timing information that mediates the synchronization of power loss calculations, allowing both apparatuses to coordinate their measurements through a shared reference frame without requiring direct continuous communication

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If cumulative power loss calculation is used due to unpredictable packet timing, then the system can maintain simple packet scheduling, but processing resource efficiency deteriorates

Engineering Contradiction:
Improveprocessing resource efficiencyVSAvoidpower loss calculation complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The system implements periodic power loss calculation within defined calculation windows established by the timing packet. Instead of continuous or cumulative calculations, both apparatuses perform discrete periodic measurements at synchronized intervals, improving processing efficiency by limiting calculations to specific time periods when data is actually available

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The calculation window timing is predetermined and communicated in advance through the timing packet. This preliminary establishment of calculation schedules allows both apparatuses to prepare and execute power loss calculations efficiently at the right moments, avoiding wasted processing on timing predictions

Inventive Principle:
Principle #10Preliminary 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

This approach enables accurate power loss calculation and reduces processing resource waste by ensuring synchronized timing between the transmission and reception apparatuses, enhancing the efficiency of power transfer and resource management.

Implementation Method 1

a power pickup circuit configured to receive, from a wireless power transmission apparatus, wireless power generated based on magnetic coupling in a power transfer phase

Methodology Applied
Scientific EffectMagnetic coupling: Electromagnetic Induction

Data Source

PatentUS11881912B2Apparatus and method for transmitting or receiving data in wireless power transmission system
Publication Date: 2024.01.23 LG ELECTRONICS INC
  • US11881912B2 patent drawing
  • US11881912B2 patent drawing
  • US11881912B2 patent drawing

AI summary

The present application describes a wireless power reception device comprising: a power pickup circuit configured to receive, from a wireless power transmission device, a wireless power generated on the basis of magnetic coupling in a power transmission phase; and a communication and control circuit configured to transmit, to the wireless power transmission device, a configuration packet including first dual data stream information, or to receive, from the wireless power transmission device, a capability packet including second dual data stream information. Upper layer data can be effectively exchanged by clearly recognizing whether the upper layer data is bidirectionally transmitted between the wireless power transmission device and the wireless power reception device, and accuracy of power loss and saving of processing resources can be achieved by synchronizing the timing of calculating the power loss between the wireless power transmission device and the wireless power reception device.