An ultrasound-based wireless power transmission device that penetrates metal plates
A technology of wireless energy transmission and ultrasonic waves, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problem of wireless charging of electric equipment and the inability of electromagnetic waves to penetrate metal and other problems, to achieve the effect of solving electromagnetic interference, improving transmission capacity and transmission efficiency, and reducing reactive power loss
Inactive Publication Date: 2017-03-08
DALIAN UNIV OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the technical problem that electromagnetic waves cannot penetrate metal in the existing wireless power transmission technology and cannot wirelessly charge electric equipment in metal containers
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[0027] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions of the description.
[0028] Such as figure 1 As shown, an ultrasound-based wireless power transmission system through metal plates includes a power supply, a rectifier circuit, an inverter circuit, a PWM generation circuit, a drive circuit, an impedance matching circuit at a transmitting end, a transmitting transducer, a metal medium, and a receiving transducer device, receiving transducer impedance matching circuit, rectification and voltage stabilization circuit and load. The power-frequency alternating current provided by the power supply is rectified and converted by an inverter circuit to obtain high-frequency alternating current. The high-frequency alternating current is tuned and impedance-transformed by the impedance matching circuit of the transmitting transducer, and f...
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The invention provides a wireless electric energy transmission device based on ultrasonic waves capable of penetrating through a metal plate, and belongs to the technical field of wireless electric energy transmission. The device comprises a transmitting system, an energy transmission device and a receiving system. The energy transmission device comprises a transmitting transducer, a receiving transducer, the metal plate and an internal thread cylinder. The transmitting transducer is of a sandwich type longitudinal vibration piezoelectric transducer structure and comprises a piezoelectric ceramic piece, an electrode piece, a front cover plate with an external thread, a rear cover plate and a prestress bolt. The wireless electric energy transmission technology based on the ultrasonic waves is adopted, and the problem of electromagnetic interference which is difficult to avoid in the sensing coupling technology and the electric field coupling technology is effectively solved; the gap that the wireless power transmission technology based on the electromagnetism principle cannot be applied in a closed metal container is filed; impedance matching is carried out on the transmitting transducer and the receiving transducer, reactive losses are reduced, and the system transmission capability and efficiency are improved; the transducers are in threaded connection with a metal container, and therefore disassembly is convenient.
Description
technical field [0001] The invention relates to an ultrasound-based wireless power transmission device for penetrating metal plates, belonging to the technical field of wireless power transmission. Background technique [0002] Traditional power transmission is mainly carried out by direct contact of wires. However, in mines, oil drilling, underwater, and internal power supply of airtight equipment, the use of contact power transmission may cause problems such as explosion, sliding wear, contact sparks, and airtightness cannot be guaranteed, which will affect the service life of the equipment, personal property, etc. adverse effects on safety, etc. [0003] The wireless power supply method based on wireless power transmission technology has no direct electrical contact between the power supply and the electrical equipment, so the above-mentioned problems caused by wire contact can be effectively avoided. From the research at home and abroad, the most widely used wireless p...
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IPC IPC(8): H02J5/00H02N2/00H02N2/18
Inventor 刘丹宁陈希有许康
Owner DALIAN UNIV OF TECH