System and method for achieving wireless power transmission through ferromagnetic resonance

Abstract

The invention discloses a system and a method for achieving wireless power transmission through ferromagnetic resonance. The system for achieving the wireless power transmission through the ferromagnetic resonance comprises a transmitting terminal power frequency alternating current power supply, a transmitting terminal ferromagnetic resonator primary side coil, a transmitting terminal resonance capacitor, a receiving terminal ferromagnetic resonator vice side coil, a receiving terminal resonance capacitor and a receiving terminal load and the transmitting terminal ferromagnetic resonator primary side coil is connected with the receiving terminal ferromagnetic resonator vice side coil in a coupling mode. The method for achieving the wireless power transmission through the ferromagnetic resonance includes that a transmitting terminal and a receiving terminal utilize a non-linear relationship between the ferromagnetic material magnetic field intensity and the magnetic flux density to generate the ferromagnetic resonance or chaotic oscillation, magnetic coupling between the transmitting terminal ferromagnetic resonator primary side coil and the receiving terminal ferromagnetic resonator vice side coil is utilized to achieve resonance synchronization, and accordingly the resonance can be achieved in a whole frequency domain and the wireless power transmission is achieved. According to the system and the method for achieving the wireless power transmission through the ferromagnetic resonance, the interference to communication equipment is discarded in the principle due to consistency of self-oscillation resonance or the chaotic oscillation to achieve an efficient, high power and remote wireless power transmission purpose.

Description

technical field [0001] The invention belongs to the application field of wireless power transmission or non-contact power transmission, and in particular relates to a system and method for realizing wireless power transmission by using ferromagnetic resonance. Background technique [0002] Wireless power transmission technology can overcome many shortcomings of wired power transmission methods, such as the need for wire connections, easy contact sparks at wire joints, poor equipment movement flexibility, and unsightly environments. Therefore, this technology is widely used in electric power, household electronics, military, aerospace , urban electrified transportation, industrial robots, industrial and mining enterprise hoisting equipment and transportation equipment, underwater operations, high-rise building elevators and other fields have important application value and broad application prospects. [0003] At present, the resonant coupling wireless power transfer system m...

AI Technical Summary

Problems solved by technology

[0003] At present, the resonant coupling wireless power transfer system must be powered by a high-frequency power source, most of which require an RF power supply above MHz, which has high cost and low power, and requires that the power source, the transmitting coil and the receiving coil always have the same operating frequency or inherent frequency

For this reason, the resonant coupling wireless power transmission system has the following insurmountable problems: 1. High-frequency switching power supply is required, and power electronic switching devices or power amplifier devices are required in the power supply, thereby introducing switching losses to reduce transmission efficiency; 2. Environment and load changes When the power source, transmitting coil and receiving coil operating frequency or natural frequency will shift to different degrees, there will be a phenomenon of detuning, and high-efficiency wireless power transmission cannot be realized; 3. The high resonance frequency may cause damage to surrounding communication equipment. Interference; 4. The relationship between resonance frequency and transmission power, efficiency, and coupling coefficient is complicated, and it is difficult to control accurately; 5. The resonance frequency depends on the coil inductance and stray capacitance, which are closely related to the shape and material of the coil. Calculation and difficult to measure

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