Wireless Power Transmitter Standard Detection Sequence
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Solution Overview
Problem
The Qi and PMA wireless power standards have different start-up sequences, requiring power transmission apparatuses to determine the standard supported by the power receiving apparatus, which increases the time required for system initialization and can lead to mismatched operation modes.
Innovation Solution
A control method for wireless power transmission apparatuses that uses digital and analog pings to determine the supported standard, optimizing the sequence based on the prevalence of each standard and selecting the most efficient transmission coil for power delivery, thereby reducing judgment time and preventing mismatched operation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power transmission apparatus sequentially checks both Qi and PMA standards to determine the supported standard, then the compatibility with multiple standards is improved, but the time required for system initialization increases
Solution Approach 1:
The patent applies preliminary action by performing a quick preliminary check using digital pings specific to each standard (Qi and PMA) before full initialization. The controller sends digital pings in an optimized sequence based on standard prevalence, and if a ping response is detected, it tentatively determines the standard early in the process, avoiding the need to sequentially perform complete checks of both standards and thereby reducing initialization time while maintaining compatibility.
2Reliability
If the power transmission apparatus performs multiple checks to ensure accurate standard determination, then the reliability of standard identification is improved, but the judgment time increases
Solution Approach 1:
The patent performs a preliminary standard determination using digital pings early in the initialization process, which provides a fast but potentially tentative identification. This preliminary action is followed by a confirmation phase where the controller verifies the standard determination through additional checks only if necessary, thereby maintaining high reliability while minimizing the time spent on standard identification.
Solution Approach 2:
The patent implements a dynamic standard determination process where the checking sequence and depth are adjusted based on preliminary results and detected responses. If a digital ping response is clearly detected, the controller can confidently determine the standard with fewer checks. The process adapts its rigor based on the situation, performing more checks only when the preliminary determination is uncertain, thus balancing reliability and time efficiency.
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
The method significantly reduces the time required to determine the power supply method and ensures efficient power delivery by optimizing the sequence and coil selection, preventing mismatched operation modes and improving startup efficiency.
Implementation Method 1
This provides a driving current flowing through the transmission coil 202, which generates an electric power signal S2 at the transmission coil 202 in the form of an electromagnetic signal.
Implementation Method 2
The reception coil 302 receives the electric power signal S2 from the transmission coil 202
Data Source
AI summary
First, a power receiving apparatus RX is detected (S100). Subsequently, a pre digital ping is sent according to a first method (S112). Upon reception of an unique signal defined for the first method from the power receiving apparatus RX (YES in S114), tentative judgment is made that the power receiving apparatus RX supports the first method, and the flow transits to a final judgment operation (S120). When such an unique signal has not been received (NO in S114), tentative judgment is made that the power receiving apparatus RX supports a second method, and the flow transits to a final judgment operation (S130).