Power Supply Apparatus with Multi-Frequency Resonance Prioritization
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Solution Overview
Problem
The magnetic resonance scheme for non-contact power transfer to multiple terminal devices results in reduced power transmission to each device as the number of devices in the transfer range increases, leading to unintended power transmission to devices that should not receive it, falling short of expected power delivery to prioritized devices.
Innovation Solution
A power supply apparatus with a near-field wireless communication unit that sets multiple resonance frequencies and a control unit to determine priority levels for communication terminals, allowing for differential power transmission based on registration state, ensuring high power to high-priority devices and low power to low-priority devices within the same transfer range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If magnetic resonance scheme is used to transfer power to multiple terminal devices simultaneously, then the power transfer range is extended and multiple devices can be charged at once, but the power transmitted to each individual device is reduced
Solution Approach 1:
The patent segments the power transmission by assigning different resonance frequencies to different terminal devices. The power supply device transmits power at multiple distinct frequencies simultaneously, allowing each device to resonate at its assigned frequency and receive adequate power even when multiple devices are being charged at the same time.
Solution Approach 2:
The patent changes the frequency parameter of power transmission to resolve the contradiction. By transmitting power at multiple different frequencies rather than a single frequency, the system can maintain sufficient power levels for each device while charging multiple devices simultaneously, as each device is tuned to receive power at its specific resonant frequency.
2Reliability
If power is transmitted to all devices within transfer range, then no device is left without power, but unregistered devices receive power that should be allocated to registered devices
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices transmit identification information to the power supply device. The power supply device uses this feedback to determine whether each device is registered, and accordingly assigns resonance frequencies and power levels - granting power to registered devices while preventing or limiting power transmission to unregistered devices.
Solution Approach 2:
The patent applies different power transmission qualities to different devices based on their registration status. Registered devices receive full power allocation with dedicated resonance frequencies, while unregistered devices either receive no power or significantly reduced power, creating a differentiated power distribution system that prioritizes authorized users.
3Power
If multiple resonance frequencies are used to prioritize power transmission, then registered devices receive sufficient power, but the system complexity increases
Solution Approach 1:
The patent makes the power supply device multi-functional by equipping it with the capability to transmit power at multiple resonance frequencies simultaneously and to identify different terminal devices. This universal design allows a single power supply device to serve multiple registered devices with different power requirements, eliminating the need for separate power transmission systems for each device.
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 enables efficient power distribution by prioritizing power transmission to registered devices, ensuring they receive a larger amount of power while minimizing power transfer to unregistered devices, thus optimizing power transfer efficiency and meeting the expected power requirements of each terminal.
Implementation Method 1
a power transmission coil is provided in the power transmission-side device and a power reception coil is provided in the power reception-side terminal device. Then, the part where the power transmission coil of the power transmission-side device is provided is brought near to that where the power reception coil of the power reception-side device is provided to produce the magnetic flux coupling between the power transmission coil and the power reception coil so that the power transmission is attained in a non-contact manner
Implementation Method 2
an LC circuit including a coil, a capacitor, and so forth is provided in each of the power transmission-side device and the power reception-side device to establish the electric field-and-magnetic field resonance between both the LC circuits so that the wireless power transfer is achieved
Data Source
AI summary
A power supply apparatus including a near-field wireless communication unit that wirelessly communicates with a plurality of communication terminals, a power transmission unit that sets a plurality of resonance frequencies to transfer power in a non-contact manner to each of the plurality of communication terminals, and a control unit that determines a priority level of each of the communication terminals based on identification information received from the communication terminals and determines an amount of power transmitted at each of the resonance frequencies based on the determined priority levels.