Negative resistor-based series-parallel wireless power transmission system

Abstract

The invention discloses a negative resistor-based series-parallel wireless power transmission system, which comprises a negative resistor and a transmitting circuit which are connected with each other, and a receiving circuit and a load which are connected with each other, wherein the transmitting circuit comprises a primary side capacitor and a primary side transmitting coil which are connected in series; the primary side transmitting coil comprises a primary side inductor and a transmitting circuit internal resistor which are connected in series; the transmitting circuit internal resistor refers to all positive resistors, except for the resistors reflected to a primary side from a secondary side, of the transmitting circuit; the receiving circuit comprises a secondary side receiving coiland a secondary side capacitor which are connected in parallel; the secondary side receiving coil comprises a secondary side inductor and a receiving circuit internal resistor which are connected inseries; and the receiving circuit internal resistor refers to all positive resistors, except for the load, of the receiving circuit. Energy supply for the circuits is achieved by using the property that energy is generated by the negative resistor, so that a high-frequency inverter source in a traditional series-parallel wireless power transmission system is replaced, and the system is simpler instructure, higher in working frequency and more stable in transmission efficiency.

Description

technical field [0001] The present invention relates to the field of wireless power transmission or wireless power transmission technology, in particular to a series-parallel wireless power transmission system based on negative resistance. Background technique [0002] Wireless power transmission technology can realize complete electrical isolation between power supply and electrical equipment, and has the advantages of safety, reliability and flexibility. As early as the end of the 19th century, Nikola Tesla used the principle of wireless power transmission to light up a light bulb without any wire connection. Wireless power transmission based on magnetic coupling resonance is a breakthrough made by MIT scholars in the field of wireless power transmission. Since it was published in 2007, it has aroused great repercussions in the field of wireless power transmission. More and more scholars Join in the basic research and application development of wireless power transfer tec...

AI Technical Summary

Problems solved by technology

In order to meet the development trend of high-frequency and high-efficiency wireless power transmission systems, switch-type driving sources (power amplifiers) such as class D and class E power amplifiers are usually used. Although the theoretical efficiency of this type of power amplifier reaches 100%, the output Low power, only suitable for low power applications

At present, bridge inverters composed of IGBT and MOSFET tubes are mostly used in high-power applications, and different soft-switching algorithms are used to realize wireless transmission of electric energy, but its operating frequency is low and the transmission distance is short.

Therefore, restricted by factors such as power switching tubes and circuit topology, it is still quite difficult to realize high-frequency (above MHz), high-reliability, and high-power switching converters under the existing technical conditions.

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