Wireless Power Data Timing Synchronization for Accurate Loss Calculation
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in accurately calculating power loss due to asynchronous timing between the transmission and reception apparatuses, leading to inefficient resource utilization and potential damage from incompatible power transfers.
Innovation Solution
Implementing a method to synchronize the timing of power loss calculation between the wireless power transmission and reception apparatuses, enabling accurate bidirectional data exchange and reducing processing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless power transmission apparatus measures transmission power and the wireless power reception apparatus measures received power at different timings, then the system can operate independently without complex synchronization, but the power loss calculation becomes inaccurate
Solution Approach 1:
The patent implements a feedback mechanism where the wireless power reception apparatus sends received power measurements back to the transmission apparatus, and the transmission apparatus uses this feedback to calculate power loss. The system establishes a timing synchronization protocol where the reception apparatus responds to transmission apparatus measurements, creating a closed-loop feedback system that ensures both devices measure at synchronized timings, thereby improving power loss calculation accuracy without requiring complex centralized synchronization
Solution Approach 2:
Each apparatus independently manages its own measurement timing based on received timing information from the other apparatus. The transmission apparatus determines when to measure transmission power based on expected reception timing, and the reception apparatus measures received power at its own determined timing and reports back. This self-service approach allows both devices to autonomously synchronize their measurements without external coordination, reducing overall system complexity while maintaining measurement accuracy
2Reliability
If the wireless power transmission apparatus cumulatively calculates transmission power every offset, then it can account for variable timing, but processing resources are wasted
Solution Approach 1:
The system performs preliminary timing synchronization during the connection establishment phase, where the transmission and reception apparatus exchange timing information and determine their measurement schedules in advance. This preliminary action allows both devices to know exactly when measurements will occur, eliminating the need for cumulative calculations and enabling the transmission apparatus to calculate power loss efficiently using only the specific transmission power value corresponding to the synchronized measurement timing
Solution Approach 2:
The patent changes the calculation parameter from cumulative power values to specific instantaneous power values at synchronized timing points. Instead of accumulating transmission power over multiple offsets, the system uses the predetermined timing information to identify and use only the relevant transmission power measurement, significantly reducing processing requirements while maintaining calculation reliability through the synchronized timing protocol
3Productivity
If higher layer data transmission is implemented without clear bidirectional recognition, then the protocol can be simpler, but data exchange effectiveness is reduced
Solution Approach 1:
The patent segments the data transmission protocol into distinct directional phases: transmission apparatus sending higher layer data, acknowledgment phase where reception apparatus confirms receipt, and reception apparatus sending higher layer data with its own acknowledgment. This segmentation creates clear bidirectional recognition points in the protocol flow, enabling effective data exchange while maintaining manageable protocol complexity through structured, phase-separated communication
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 the accuracy of power loss calculation and reduces resource waste by synchronizing timing, ensuring stable and compatible power transfers between devices.
Implementation Method 1
In the electromagnetic induction method, a power transmission unit generates a magnetic field through a power transmission coil (i.e., a primary coil), and a power reception coil (i.e., a secondary coil) is placed at the location where an electric current may be induced so that power is transferred
Implementation Method 2
In the resonant method, energy is transmitted using a resonant phenomenon between the transmission coil and the reception coil. In this case, a system is configured so that the primary coil and the secondary coil have the same resonant frequency, and resonant mode energy coupling between the transmission and reception coils is used
Data Source
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AI summary
The present specification relates to an apparatus and a method for transmitting or receiving data in a wireless power transmission system. The present specification discloses 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.