Wireless Multi-Charger System Foreign Substance Detection
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Solution Overview
Problem
Conventional wireless chargers face inefficiencies in charging multiple devices simultaneously and are prone to damage due to foreign substances, leading to increased charging time and potential safety hazards.
Innovation Solution
A wireless multi-charger system with a central controller and full-bridge resonant converters, capable of detecting foreign substances and adjusting power transmission to prevent damage, while allowing for simultaneous charging of multiple devices with improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional wireless charger charges only one portable terminal block at a time, then the charging process is simple and reliable, but the total charging time for multiple devices increases significantly
Solution Approach 1:
The wireless charger is divided into multiple independent charger blocks (first charger block, second charger block, etc.), each capable of charging one portable terminal block simultaneously. This segmentation allows the system to charge multiple devices at once while maintaining the simplicity and reliability of individual charging units.
Solution Approach 2:
Multiple charger blocks are integrated into a single wireless charger system that shares common control logic and power management. The controller coordinates the operation of all charger blocks, enabling simultaneous charging of multiple devices while maintaining system-wide optimization and control.
2Loss of time
If the wireless charger operates with a single charger block, then the control system is simple, but the total charging time for multiple devices becomes excessively long
Solution Approach 1:
The system uses multiple charger blocks that can operate in parallel, significantly reducing the total charging time for multiple devices. Each charger block functions independently to charge one device at a time, but collectively they provide multi-device charging capability.
Solution Approach 2:
The controller activates only the necessary number of charger blocks based on the charging demand. When only one device needs charging, only one charger block is activated; when multiple devices are present, additional charger blocks are activated accordingly, optimizing resource usage.
3Ease of operation
If metals are disposed adjacent to the magnetic field in the primary coil, then the wireless charger may provide convenient wireless power transmission, but the wireless charger may be damaged due to increased power loss
Solution Approach 1:
The controller continuously monitors the operation status of each charger block and detects abnormalities such as excessive power loss or unusual current draw. When metals are detected adjacent to the magnetic field, the feedback mechanism identifies the issue and triggers appropriate protective actions to prevent damage to the wireless charger.
Solution Approach 2:
The controller acts as an intermediary between the charger blocks and the power source, mediating the power transmission process. It monitors the interaction between the magnetic field and surrounding objects, and when harmful effects are detected (such as metal interference), it adjusts or terminates power transmission to prevent damage.
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
The system significantly reduces total charging time, prevents device damage from foreign substances, and maintains stable charging efficiency even when devices are moved during charging.
Implementation Method 1
an induced electromotive force is generated in the secondary coil by the magnetic field formed in the primary coil, and electricity induced from the induced electromotive force is charged in the secondary coil
Implementation Method 2
full-bridge resonant converters, capable of detecting foreign substances and adjusting power transmission
Data Source
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AI summary
Disclosed are a wireless multi-charger system capable of saving the total charging time of a large number of wireless power transmission devices since one wireless multi-power transmission device includes a plurality of the wireless power transmission devices so that a large number of the wireless power transmission devices can be charged with electricity, and preventing the damage of the wireless power transmission devices and the wireless multi-power transmission device although foreign substances are put on charger blocks that are not charged. The wireless multi-charger system (A) according to the present invention includes an external body formed as a wireless charger case 11, wherein the wireless charger case has a wireless charger table 12 formed in an upper surface thereof, wherein the wireless charger table has a plurality of charger blocks 14, each of which includes a primary charging core 13, wherein the full-bridge resonant converter is present in a plural form and coupled respectively to a plurality of the charger blocks, wherein a multi-gate driver module is provided to transmit a converted power signal to each of a plurality of the full-bridge resonant converters under the control of the central controller, and wherein a reception signal processor module coupled to a plurality of the charger blocks to process a signal transmitted from the wireless power transmission device 30 and supply the processed signal to the central controller is provided.