Wireless Power Transmitter Communication for Dynamic Power Negotiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmission systems lack efficient and safe power management and authentication methods, especially when foreign substances are detected or the charging environment changes, preventing timely adjustments to power levels and authentication.
Innovation Solution
A method and apparatus for wireless power transmission systems that include a communication/control unit for negotiating power indicators and a power conversion unit to generate magnetic coupling, allowing for dynamic power adjustments and autonomous authentication through bit pattern responses and power indicator packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless power transmission apparatus transmits only a response to a request from the wireless power reception apparatus, then the communication protocol is simple, but the transmission apparatus cannot actively adjust power levels or perform authentication when foreign substances are detected or charging environment changes
Solution Approach 1:
The patent inverts the traditional communication role assignment by enabling the transmission apparatus (normally the slave) to initiate communication and transmit requests to the reception apparatus (normally the master). This allows the transmission apparatus to actively send power adjustment requests and authentication requests, resolving the limitation of passive response-only communication while maintaining protocol simplicity through role reversal rather than adding complex master control logic
Solution Approach 2:
The transmission apparatus performs self-service by autonomously detecting foreign substances and charging environment changes, then independently initiating communication to adjust power levels and perform authentication without waiting for reception apparatus requests. This self-initiated control enables adaptive power management while keeping the communication protocol straightforward
2Reliability
If the wireless power transmission apparatus cannot initiate communication, then the communication process is straightforward, but timely power adjustments and authentication cannot be performed when charging conditions change
Solution Approach 1:
The transmission apparatus is equipped with preliminary action capabilities to detect foreign substances and charging environment changes before they become critical issues. By proactively initiating communication and adjusting power levels in advance, the system ensures timely power management and authentication, preventing unsafe charging conditions while maintaining straightforward communication protocols
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
Enables the wireless power transmission apparatus to adjust power levels dynamically and initiate communication and authentication based on ambient conditions, ensuring safe and efficient power management.
Implementation Method 1
a power conversion unit configured to transmit a wireless power to the wireless power reception apparatus by generating magnetic coupling in a primary coil
Data Source
AI summary
A wireless power transmission apparatus including a controller configured to initiate a digital ping to solicit a response from a wireless power reception apparatus, receive the response from the wireless power reception apparatus, and perform a negotiation for a first power level with the wireless power reception apparatus, and a power converter configured to transmit a wireless power to the wireless power reception apparatus based on the first power level, wherein the controller is configured to transmit, to the wireless power reception apparatus in response to a received power packet, a bit pattern response requesting a communication by the wireless power transmission apparatus to change the first power level, and transmit a packet related to a second power level to the wireless power reception apparatus, and wherein the bit pattern response is defined as a pattern different from a bit pattern for an 8-bit ACK response, a bit pattern for an 8-bit NAK response and a bit pattern for an 8-bit ND response.