Wireless Power Transmitter Authentication Control
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Solution Overview
Problem
In wireless power transmission systems, after a power reception apparatus is fully charged, the power transmission apparatus may continue to perform unnecessary authentication processing and communication with the reception apparatus still within its range, leading to inefficiencies and increased power consumption.
Innovation Solution
A power transmission apparatus with a detection unit, authentication unit, and control unit that stops power transmission and prevents re-authentication when the power reception apparatus is fully charged, ensuring that authentication processing only occurs with new objects within the transmission range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power transmission apparatus continues to perform authentication processing with the power reception apparatus after full charge, then the detection of new objects may be improved, but unnecessary power consumption and processing occur
Solution Approach 1:
The control unit sets an authentication prohibition period immediately after power transmission stops due to full charge detection. This preliminary action prevents the authentication unit from performing unnecessary authentication processing during this period, thereby avoiding wasted energy while maintaining the ability to detect new objects that enter the transmission range after the prohibition period expires.
2Ease of operation
If the power transmission apparatus performs authentication processing with fully charged devices, then communication connectivity is maintained, but system efficiency decreases
Solution Approach 1:
The control unit proactively sets an authentication prohibition period before any potential unnecessary authentication can occur. This preliminary timing mechanism ensures that the authentication unit will not waste processing resources on fully charged devices, thereby improving system efficiency while still allowing connectivity to be re-established when new objects enter the range after the prohibition period.
3Difficulty of detecting and measuring
If the power transmission apparatus continuously monitors for objects in transmission range, then detection capability is improved, but unnecessary processing with fully charged devices increases
Solution Approach 1:
The control unit sets an authentication prohibition period as a preliminary measure that temporarily suspends authentication processing. This allows the detection unit to continue monitoring for new objects in the transmission range without the overhead of performing authentication processing on fully charged devices, thereby reducing wasted processing time while maintaining detection capability.
Data Source
AI summary
A power transmission apparatus that wirelessly transmits power includes a detection unit that detects an object, an authentication unit that performs authentication processing including a determination whether the object detected by the detection unit is a power reception apparatus, a power transmission unit that wirelessly transmits power according to a result of the authentication processing performed by the authentication unit, a reception unit that receives a power transmission stop request, and a control unit that stops power transmission according to reception of the power transmission stop request and controls the authentication unit so that the authentication processing is not performed in a period from when the power transmission is stopped to when another object different from the object determined to be a power reception apparatus is detected by the detection unit.