Wireless Power Receiver with Dual-Mode Frequency Detection
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Solution Overview
Problem
Current wireless power transfer stations are inefficient and slow due to lack of robust connection setup methods, inability to quickly detect and adapt to different standards, and limited communication distance, leading to delayed charging and incompatibility with various wireless power transfer standards.
Innovation Solution
A device capable of operating in broadband and narrowband modes to efficiently receive wireless power, with a receiver module that determines carrier frequencies, transmits response signals, and includes a power logic module for intelligent power distribution, along with a sensor and display module for optimal positioning, enabling faster setup and compatibility with multiple standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional WPT communication protocols are used for connection setup, then the system is simple to implement, but the charging initialization time is slow and connection accuracy is low
Solution Approach 1:
The receiver performs broadband scanning to detect carrier frequencies before establishing narrowband communication, preparing the connection in advance. This preliminary frequency detection action reduces the time required for formal connection setup by having the receiver ready to communicate immediately when a transmitter is found.
Solution Approach 2:
The connection setup process is divided into two distinct phases: broadband frequency detection phase and narrowband communication phase. This segmentation allows each phase to be optimized independently - broadband for quick scanning and narrowband for accurate communication - thereby reducing overall initialization time while maintaining simplicity.
2Adaptability or versatility
If broadband mode is used for signal reception, then the receiver can detect multiple carrier frequencies, but the signal reception precision is reduced
Solution Approach 1:
The reception process is segmented into broadband scanning mode for detecting multiple carrier frequencies and narrowband communication mode for precise signal reception. The receiver switches from broadband to narrowband mode after detecting the carrier frequency, thereby achieving both wide frequency coverage and high precision communication.
Solution Approach 2:
The receiver dynamically adjusts its bandwidth based on the operational phase - using wide bandwidth during initial scanning to detect multiple frequencies, then switching to narrow bandwidth during communication to improve signal precision. This dynamic adaptation resolves the contradiction between versatility and precision.
3Adaptability or versatility
If a fixed frequency receiver is used, then the device complexity is low, but the compatibility with multiple WPT standards is limited
Solution Approach 1:
The receiver is designed with multi-functionality to operate in both broadband scanning mode and narrowband communication mode, and to support multiple WPT standards including WiTricity and AirFuel. This universal design allows a single receiver to adapt to different standards without requiring multiple specialized receivers, thereby improving compatibility while controlling complexity.
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
This solution significantly reduces charging initialization time, enhances compatibility with various standards, and optimizes power transfer efficiency by allowing earlier communication and intelligent power routing, improving user experience and device charging speed.
Implementation Method 1
a receiver module configured to determine a carrier frequency of the received signal
Implementation Method 2
in the narrowband mode, the receiver is configured to receive signals primarily at the determined carrier frequency while filtering signals outside the immediate vicinity of the carrier frequency
Data Source
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AI summary
A wireless power transfer system is disclosed that includes a power station and a chargeable device. The power station transmits discovery beacons in order to detect a chargeable device within its vicinity using any available communication protocols and/or standards. Once a device is discovered, the power station can perform coil selection with the device in order to select preferred coils for power transfer. In addition, the chargeable device is capable of detecting the beacon signal and providing a response to notify the power station of its presence. The chargeable device is capable of performing its own coil selection for further optimization and includes various assistance functionality to aid a user in optimizing a connection with the power station.