Wireless Charging Tray Time-Sharing Control for Multi-Device Efficiency
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Solution Overview
Problem
Existing noncontact power supply systems face inefficiencies when charging multiple electronic devices simultaneously, as they require complex circuit configurations and are prone to mutual induction, leading to decreased electric power transmission efficiency.
Innovation Solution
A feed system with a power transmission section using a magnetic field and a system control section that implements time sharing control to switch charging operations in electronic devices, eliminating the need for complicated impedance matching circuits and reducing mutual induction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If noncontact power supply is performed simultaneously for two or more electronic devices using a single charging tray, then user convenience and charging capacity are improved, but circuit configuration complexity increases and power transmission efficiency decreases
Solution Approach 1:
The charging process is segmented into time slots, with each electronic device being charged in sequence rather than simultaneously. The power transmission section alternates between devices, dividing the charging operation into discrete temporal segments that simplify the circuit configuration while maintaining multi-device charging capability
Solution Approach 2:
The system implements periodic charging cycles that alternate between different electronic devices. The power transmission section periodically switches between devices in a cyclic manner, allowing each device to receive dedicated power transmission during its assigned time slot, thereby reducing circuit complexity while supporting multiple devices
2Adaptability or versatility
If noncontact power supply is performed simultaneously for two or more electronic devices, then charging capacity is improved, but power transmission efficiency decreases due to mutual induction
Solution Approach 1:
The simultaneous charging process is segmented into sequential time slots, where each electronic device receives power transmission individually. This temporal segmentation eliminates mutual induction between devices by ensuring only one device is actively charged at any given moment, thereby maintaining high power transmission efficiency while supporting multiple devices
Solution Approach 2:
The system employs periodic switching between devices to eliminate mutual induction interference. By alternating power transmission in periodic cycles between different devices, the system prevents the simultaneous electromagnetic interactions that cause energy loss, thereby maintaining efficient power transmission across multiple devices
3Loss of energy
If impedance matching is performed for all electronic devices simultaneously, then power transmission efficiency is improved, but control difficulty increases
Solution Approach 1:
Impedance matching is performed separately for each electronic device during its dedicated time slot, rather than attempting simultaneous matching for all devices. This segmentation allows the system to optimize power transmission efficiency for each device individually using simple control logic, avoiding the complexity of coordinated multi-device impedance matching
Solution Approach 2:
The system periodically performs impedance matching for each device in sequence during its assigned time slot. This periodic, sequential approach to impedance matching maintains high power transmission efficiency for each device while keeping control difficulty low, as each matching operation is performed independently rather than as a complex simultaneous 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
This approach allows for efficient electric power transmission to multiple electronic devices without complex circuits, improving power transmission efficiency and simplifying the charging process.
Implementation Method 1
a feed apparatus (noncontact charger, or wireless charger) that performs noncontact power supply using electromagnetic induction, magnetic resonance, or the like
Implementation Method 2
a power receiving section receiving electric power transmitted from the power transmission section
Data Source
AI summary
A feed system includes a plurality of electronic devices; and a feed apparatus having a power transmission section performing electric power transmission using a magnetic field to the plurality of electronic devices. Each of the electronic devices includes a power receiving section receiving electric power transmitted from the power transmission section, and a switching section switching whether or not to carry out charging operation based on the electric power received by the power receiving section, according to time sharing control by a system control section.