Wireless Power Reception Apparatus with Load Change Detection
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Solution Overview
Problem
In wireless power transmission systems, fluctuations in power consumption among multiple power reception apparatuses can lead to overvoltage or instantaneous power interruptions, potentially damaging the wireless power transmission circuits.
Innovation Solution
A power reception apparatus equipped with a detection unit to monitor changes in power consumption and transmit requests to the power transmission apparatus to adjust the reception power, preventing overvoltage and interruptions by requesting power adjustments before load operation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single power transmission apparatus simultaneously transmits electric power to multiple power reception apparatuses, then power transmission efficiency is improved, but power reception stability deteriorates due to power consumption fluctuations
Solution Approach 1:
The power reception apparatus transmits a request for changing reception power to the power transmission apparatus before the load unit is operated in response to the detected instruction. This preliminary action allows the power transmission apparatus to adjust the transmission power in advance, preventing power reception instability caused by sudden load changes while maintaining simultaneous power transmission to multiple devices.
2Adaptability or versatility
If power consumption of a power reception apparatus changes during operation, then operational flexibility is improved, but overvoltage or power interruption occurs affecting other reception apparatuses
Solution Approach 1:
The power reception apparatus applies preliminary anti-action by transmitting a power change request before the load operation causes power consumption changes. This prevents overvoltage or power interruption from occurring in the first place, thereby protecting other power reception apparatuses from harmful effects while allowing operational flexibility.
Solution Approach 2:
The system implements feedback by having the power reception apparatus monitor its own power consumption changes and communicate these changes to the power transmission apparatus. The transmission apparatus then adjusts the transmission power accordingly, creating a closed-loop control system that prevents overvoltage and power interruption while maintaining adaptability.
Data Source
AI summary
An object of the present invention is to transmit a request for a setting of power transmission in accordance with change of power consumption to a power transmission apparatus.A power reception apparatus according to the present invention includes a power reception unit which wirelessly receives electric power from a power transmission apparatus, a detection unit which detects an instruction for controlling a load unit which operates using the electric power received by the power reception unit, and a transmission unit which transmits, to the power transmission apparatus, a request for changing an amount of reception power in accordance with change of an amount of power consumption of the load unit caused when the load unit is operated in response to the instruction detected by the detection unit while the power reception unit receives the electric power, before the load unit is operated in response to the instruction.