Wireless Power Frequency Control for Multi-Receiver Charging
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Solution Overview
Problem
Existing wireless charging systems face inefficiencies when charging multiple receivers simultaneously due to interference and mismatched load states, requiring appropriate power distribution based on varying receiver conditions.
Innovation Solution
A wireless power transmission device controls transmission frequency and resonant frequencies of multiple receivers independently, adjusting these parameters based on battery state and demanded power information to optimize power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single transmitter charges multiple receivers simultaneously, then space and cost are reduced, but receivers may interfere with each other and power distribution becomes difficult to control
Solution Approach 1:
The patent divides the power transmission system into multiple independent transmission coils, each capable of transmitting power to a specific receiver. This segmentation allows the transmitter to independently control power distribution to each receiver, preventing interference while maintaining the benefit of a single transmitter unit.
Solution Approach 2:
The patent employs dynamic frequency adjustment where the transmitter can change the resonant frequency of each transmission coil based on the specific needs and conditions of each receiver. This dynamic control enables the system to adapt to different load states and coil characteristics, ensuring stable power transmission without interference between receivers.
2Loss of energy
If resonant frequency is matched for optimal power transmission, then transmission efficiency is improved, but interference between multiple receivers increases
Solution Approach 1:
The patent assigns different resonant frequencies to different transmission coils based on their specific characteristics and the requirements of each receiver. This local differentiation allows each transmission path to operate at its optimal efficiency point without causing interference to other receivers, as each operates at a unique frequency.
Solution Approach 2:
The transmitter dynamically adjusts the resonant frequency parameter of each transmission coil based on real-time conditions such as receiver load state, battery level, and power demand. This parameter change capability allows the system to maintain optimal transmission efficiency while avoiding frequency conflicts between multiple receivers.
3Device complexity
If power is distributed equally to all receivers, then simplicity is maintained, but receivers with different battery states and power needs cannot be optimized
Solution Approach 1:
The patent implements a feedback mechanism where the transmitter receives information from each receiver about its battery state, power demand, and charging status. Based on this feedback, the transmitter dynamically adjusts the power distribution to each receiver, ensuring optimal charging efficiency while maintaining relatively simple control logic through standardized communication protocols.
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 enhances system efficiency by ensuring each receiver receives the optimal amount of power, minimizing interference and improving overall charging performance.
Implementation Method 1
a transmission coil configured to wirelessly transmit power to at least one of a plurality of receivers according to a transmission frequency
Implementation Method 2
the processor is configured to control at least one of the transmission frequency or resonant frequencies of the plurality of receivers
Data Source
AI summary
Provided is a method of wirelessly transmitting power and a device for performing the method. The wireless power transmission device includes a transmission coil configured to wirelessly transmit power to at least one of a plurality of receivers according to a transmission frequency and a processor configured to control at least one of the transmission frequency or resonant frequencies of the plurality of receivers, and the processor is configured to set the resonant frequencies of the plurality of receivers differently based on the transmission frequency at which the wireless power transmission device wirelessly transmits power, determine a transmission amount of power to be wirelessly transmitted to each of the plurality of receivers, and change at least one of the transmission frequency or the resonant frequencies of the plurality of receivers based on the transmission amount.