Hybrid wireless power transmission system based on negative resistor

Abstract

The invention discloses a hybrid wireless power transmission system based on a negative resistor. The system comprises the negative resistor, a transmitting circuit, a receiving circuit and a load, wherein the negative resistor and the transmitting circuit are connected, and the receiving circuit and the load are connected. The transmitting circuit comprises a first coupling electrode plate, a transmitting coil and a primary side compensation capacitor, wherein the first coupling electrode plate is connected to a primary side circuit, the transmitting coil and the primary side compensation capacitor are connected in series with the first coupling electrode plate, the transmitting coil comprises a primary side inductor and an internal resistor of the transmitting circuit, and the primary side inductor is connected in series with the internal resistor of the transmitting circuit. The receiving circuit comprises a second coupling electrode plate, a receiving coil and a secondary side compensation capacitor, wherein the second coupling electrode plate is connected to a secondary side circuit, the receiving coil and the secondary side compensation capacitor are connected in series withthe second coupling electrode plate, the receiving coil includes a secondary side inductor and an internal resistor of the receiving circuit, and the secondary side inductor is connected in series with the internal resistor of the receiving circuit. The transmitting circuit and the receiving circuit simultaneously supply power to the load for wireless power transmission through two modes, and themodes include electric field coupling between the coupling electrode plates and magnetic field coupling between the transmitting and receiving coils. The transmission distance of a coupling system canbe increased, and high-power, long-distance and stable wireless power transmission is achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless power transmission, in particular to a hybrid wireless power transmission system based on negative resistance. Background technique [0002] Due to the need for a large number of metal wires and cumbersome wiring projects, the traditional wired power transmission method has obvious shortcomings such as reducing the flexibility of electrical devices and being greatly affected by the working environment. In order to solve the limitations of traditional power transmission methods, wireless power transmission technology has been proposed many years ago. This method is convenient to take power, saves metal resources and does not require complicated wiring projects, which makes up for the defects of traditional wired power transmission methods. [0003] Wireless power transmission technologies mainly include magnetic field coupling, electric field coupling and microwave. Although the transmis...

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Problems solved by technology

[0004] In addition, in traditional wireless power transmission systems, in order to meet the development trend of high frequency and high efficiency, switch-type driving sources (power amplifiers) such as class D and class E power amplifiers are usually used, but they can only be used in low power applications ;In high-power occasions, a bridge inverter composed of IGBT and MOSFET tubes is used, and different soft-switching algorithms are used to realize power transmission, but its operating frequency is low and the transmission distance is short.

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