Wireless Power Profile Switching for MPP Receiver Compatibility
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining compatibility between different power profiles, leading to unstable power transfer or potential damage due to overvoltage when devices with different power classes attempt to charge each other.
Innovation Solution
A method and device for an MPP wireless power receiver to recognize a different bit pattern or lack of response to a CFG packet, enabling it to receive power based on a profile different from the MPP, thus facilitating compatibility with BPP/EPP wireless power transmitters/receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an MPP wireless power receiver attempts to charge with a BPP/EPP wireless power transmitter, then power transfer may occur, but the system may experience unstable power transfer or potential damage due to overvoltage
Solution Approach 1:
The system performs preliminary detection during the configuration phase by monitoring whether the transmitter sends a CFG packet and what ACK pattern is returned. This preliminary identification of the transmitter's power profile class allows the receiver to adjust its charging parameters before actual power transfer begins, preventing overvoltage damage and instability during the charging process
Solution Approach 2:
The receiver dynamically changes its operating parameters based on the detected transmitter profile. When a BPP/EPP transmitter is detected (through different ACK bit patterns), the receiver adjusts its voltage, current, and power acceptance parameters to match the transmitter's capabilities, ensuring stable and safe power transfer across different power profiles
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 effective power transfer and reception between MPP and BPP/EPP systems, ensuring stable and safe charging across different power profiles.
Implementation Method 1
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil
Implementation Method 2
The magnetic resonance method is similar to the magnetic induction method in that is uses a magnetic field. However, the magnetic resonance method is different from the magnetic induction method in that energy is transmitted due to a concentration of magnetic fields on both a transmitting end and a receiving end, which is caused by the generated resonance
Data Source
AI summary
A method for receiving wireless power is performed in a wireless power transmission system by a wireless power receiver supporting a magnetic power profile (MPP), and is characterized in that: an identification (ID) packet is transmitted to a wireless power transmitter, wherein the ID packet includes information notifying the presence of an extended ID (XID) packet; the XID packet is transmitted to the wireless power transmitter, wherein the XID packet includes information notifying that the wireless power receiver supports the MPP; and a configuration (CFG) packet is transmitted to the wireless power transmitter, wherein, on the basis that the wireless power receiver receives ACK having a bit pattern different from MPP ACK in response to the CFG packet, or is unable to receive a response to the CFG packet, the wireless power receiver receives the wireless power on the basis of a profile different from the MPP.