Resonance Antenna Frequency Tuning for Wireless Power Matching
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Solution Overview
Problem
Existing wireless power transmission systems fail to optimize power supply according to the required power of the receiving device, leading to inefficient and potentially overheating issues due to one-sided power transmission without recognizing the vehicle's power needs.
Innovation Solution
A method that adjusts the resonance frequency of the receiving antenna by changing its induction coefficient and electrostatic capacity to match the received power to the required power, allowing for efficient power transmission without the need for additional communication equipment, and can even set the received power to zero when not required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control signals are superimposed on AC power to simplify the system, then the amount of communication equipment is reduced, but power transmission cannot be optimized according to the receiving device's power requirements
Solution Approach 1:
The power receiving device autonomously adjusts its own resonance frequency by changing the induction coefficient and electrostatic capacity of its resonance antenna to match the transmission frequency from the power transmitting device. This self-adjustment mechanism eliminates the need for complex communication equipment to convey power requirements, while still enabling optimized power transmission according to the receiving device's actual needs.
2Power
If power is transmitted one-sidedly without recognizing required power, then power transmission can be initiated, but optimum power transmission is not performed and the receiving device may overheat
Solution Approach 1:
The power receiving device continuously monitors its own power requirements and resonance conditions, then feeds back this information by autonomously adjusting its resonance frequency to match the transmitting device's frequency. This feedback mechanism ensures that power transmission is always optimized to the receiving device's actual needs, preventing overheating while maintaining efficient power transfer.
3Productivity
If resonance frequency is adjusted to match received power to required power, then power transmission efficiency is optimized, but the device configuration becomes more complex
Solution Approach 1:
The power receiving device performs self-adjustment of its resonance frequency by autonomously changing its own circuit parameters (induction coefficient and electrostatic capacity) to match the transmitting device's frequency. This self-service approach achieves optimized power transmission efficiency without requiring external control systems or complex communication equipment, thereby maintaining relatively simple device configuration.
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 ensures high transmission efficiency, prevents overheating, simplifies the device configuration, and accurately matches power supply to demand, reducing component complexity and energy waste.
Implementation Method 1
transmits power from a first resonance antenna to a second resonance antenna in a noncontact manner through resonance of a magnetic field
Implementation Method 2
setting transmission efficiency between the first resonance antenna and the second resonance antenna as first transmission efficiency by changing a frequency of supply power of the power transmitting device
Implementation Method 3
changing a resonance frequency by change of at least one of an induction coefficient and electrostatic capacity of the second resonance antenna to change the transmission efficiency between the first resonance antenna and the second resonance antenna to second transmission efficiency smaller than the first transmission efficiency
Implementation Method 4
changing a resonance frequency by change of at least one of an induction coefficient and electrostatic capacity of the second resonance antenna
Implementation Method 5
changing a resonance frequency by change of at least one of an induction coefficient and electrostatic capacity of the second resonance antenna
Data Source
AI summary
A wireless power transmission method transmits power from a first resonance antenna to a second resonance antenna in a noncontact manner through resonance of a magnetic field. The first resonance antenna is a resonance antenna of a power transmitting device, the second resonance antenna is a resonance antenna of a power receiving device. The wireless power transmission method includes setting a first transmission efficiency between the first resonance antenna and the second resonance antenna by changing a frequency of supply power of the power transmitting device. Power transmitted from the first resonance antenna to the second resonance antenna is gradually increased. A resonance frequency is changed by changing an induction coefficient or electrostatic capacity of the second resonance antenna to change the transmission efficiency between the first and second resonance antenna to a second transmission efficiency smaller than the first transmission efficiency, thereby matching received power to required power.