Wireless Charging Coil Control for Receiver Height Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmission systems lack effective methods for power control and efficient detection of power receivers regardless of their height, leading to suboptimal charging conditions.
Innovation Solution
A wireless power transmission system that maintains a ping value table mapping ping signal conditions to each height of a power receiver, detects the receiver by varying the ping signal based on recorded conditions, and controls the charge mode according to messages received from the power receiver, enabling efficient and optimized wireless power transmission and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single transmitter coil is used for power transmission, then the system structure is simple, but only one receiver can be charged at a time (lack of concurrent multiple charging)
Solution Approach 1:
The transmitter is segmented into multiple independent transmitter coils (first transmitter coil and second transmitter coil), each capable of independently transmitting power to a receiver. This segmentation enables concurrent multiple charging by allowing different receivers to be charged simultaneously through different coils, while keeping each coil's structure relatively simple.
Solution Approach 2:
Each transmitter coil is designed with universal functionality to transmit power to receivers regardless of their height position. The system can adaptively select which coil to use based on receiver position, making each coil a multi-functional unit that can serve different charging scenarios.
2Measurement precision
If the ping signal is fixed, then the detection method is simple, but the power receiver cannot be efficiently detected at different heights
Solution Approach 1:
The ping signal is transformed from a fixed signal to a dynamic signal that varies based on transmitter coil selection and receiver height. The system adaptively adjusts ping signal parameters (such as frequency, amplitude, or timing) according to the detected receiver position, enabling efficient detection across different heights while maintaining a relatively simple detection framework.
Solution Approach 2:
The system changes ping signal parameters (frequency, amplitude, duty cycle) based on the selected transmitter coil and estimated receiver height. By dynamically adjusting these parameters, the system achieves accurate receiver detection across varying heights without requiring a completely complex detection system.
3Productivity
If wireless power transmission is performed without height consideration, then the system is easy to operate, but power transmission efficiency decreases
Solution Approach 1:
The system performs self-service by automatically detecting receiver height and adaptively selecting the appropriate transmitter coil without user intervention. The controller autonomously optimizes power transmission parameters based on detected receiver position, maintaining high transmission efficiency while keeping the operation simple for the user.
Solution Approach 2:
The system implements feedback mechanisms where the controller continuously monitors receiver detection results and power transmission efficiency, then adjusts transmitter coil selection and ping signal parameters accordingly. This closed-loop feedback ensures optimal power transmission efficiency while maintaining ease of operation.
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 efficient wireless power transmission and charging without height restrictions, allowing for optimized charging conditions and improved power transmission efficiency.
Implementation Method 1
The magnetic resonance technique is a technique of generating magnetic field that oscillates with a resonance frequency in a transmitter coil and transferring energy intensively to a receiver coil designed with the same resonance frequency.
Implementation Method 2
The electromagnetic wave technique is a technique of receiving electromagnetic wave using several rectennas in a receiver and transforming it to electrical energy.
Data Source
AI summary
A wireless power transmitting and charging system is disclosed. A method for operating a power transmitter of the wireless power transmitting and charging system comprises the steps of: maintaining a ping value table where ping signal conditions are mapped according to the height of a power receiver; recognizing the power receiver by varying a ping signal according to the ping signal conditions recorded in the ping value table; and controlling a charging mode according to a message received from the power receiver.