Multi-mode Wireless Power Transmitter with Interference Blocking
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Solution Overview
Problem
Wireless power transmission devices supporting both electromagnetic induction and resonance schemes experience power loss due to mutual interference between induction and resonant coils, limiting efficiency and charging time.
Innovation Solution
A multi-mode wireless power transmission method and device that employs a parallel LC tank and power interruption circuits to block interference between induction and resonant coils, using switches and variable parallel LC tanks to manage frequency bands and prevent power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both electromagnetic induction and resonance coils are positioned on the same charging bed to support multiple wireless power transmission schemes, then the adaptability and versatility of the device is improved, but mutual interference between the coils causes power loss and reduces transmission efficiency
Solution Approach 1:
The charging bed is segmented into multiple independent coil units, each capable of operating in different wireless power transmission modes (electromagnetic induction or electromagnetic resonance). The controller can selectively activate specific coil units based on the charging requirements, preventing mutual interference between coils operating in different modes while maintaining multi-mode capability.
2Adaptability or versatility
If both electromagnetic induction and resonance coils are positioned on the same charging bed to support multiple wireless power transmission schemes, then the adaptability and versatility of the device is improved, but the device complexity increases due to the need for interference management
Solution Approach 1:
The controller continuously monitors the operating status of each coil unit and the charging requirements, automatically selecting the appropriate coil units and transmission modes. This feedback mechanism simplifies the overall system complexity by eliminating the need for manual configuration while maintaining adaptability to different charging scenarios.
3Device complexity
If interference between coils is not blocked, then the device complexity is reduced, but power loss occurs and charging time increases
Solution Approach 1:
The controller acts as an intermediary that manages the operation of multiple coil units. By intelligently selecting which coils to activate and in what modes, the controller prevents mutual interference without requiring complex physical isolation structures, thus maintaining system simplicity while ensuring efficient power transmission and reasonable charging time.
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 approach minimizes power loss and maximizes transmission efficiency, reducing charging time by adaptively blocking mutual interference between coils.
Implementation Method 1
a parallel LC tank and power interruption circuits to block interference between induction and resonant coils, using switches and variable parallel LC tanks to manage frequency bands
Implementation Method 2
Wireless power transmission (or wireless energy transfer) is a technology for wirelessly transmitting electric energy from a transmitter to a receiver using the induction principle of a magnetic field
Data Source
AI summary
The present invention relates to a multi-mode wireless power transmission method and a device for the same. A wireless power transmitter for supporting a plurality of wireless power transmission modes, according to one embodiment of the present invention, can comprise: a first transmitter for transmitting a first power signal corresponding to a first wireless power transmission mode; a second transmitter for transmitting a second power signal corresponding to a second wireless power transmission mode; and a first power cutoff circuit coupled to the first transmitter so as to block the incoming second power signal and allow the first power signal to pass therethrough. Therefore, the present invention can minimize power consumption in the wireless power transmitter supporting the plurality of wireless power transmission modes, and can maximize power transmission efficiency.