Working frequency stabilization method for single-relay multi-load wireless power transfer system based on different number of loads connected

Abstract

The invention discloses a method for stabilizing the operating frequency of a single-relay multi-load wireless power transmission system based on the access of different numbers of loads. The single-relay multi-load wireless power transmission system includes a high-frequency power supply system, a transmitting coil, several receiving coils, and a trunk line The method is: based on the balanced power distribution of the receiving coils, the overall spatial distribution of the receiving coils is set, and then the relationship between the system operating frequency and the self-resonant frequency of each coil circuit under the condition of optimal transmission efficiency and maximum received power is derived. relationship, and the factors that affect the system operating frequency are obtained, and the method of changing the distribution radius of different numbers of receiving coils is used to adjust the system operating frequency, so that the system operating frequency is not changed by the increase or decrease of the number of receiving coils, and the charging power in each load is realized. balanced. It solves the key problems of the wireless power transfer system including single relay and multiple load modes, and provides more clear guidance for the multi-load application of the wireless power transfer system in the middle and long distances.

Description

technical field [0001] The invention relates to a method for stabilizing the operating frequency of a single-relay multi-load wireless power transmission system based on different numbers of loads connected, in particular to a method for stabilizing the operating frequency of the system under optimal transmission efficiency and maximum received power targets. Background technique [0002] In recent years, due to the friendliness and convenience of wireless power transmission technology that does not require cable connection, this technology has been applied in many industrial occasions. In contrast, in special fields such as deep sea, coal mine, and chemical industry, the traditional cable contact transmission method has many disadvantages and hidden dangers. It brings a series of problems such as difficulty in line laying and maintenance, and contact sparks. Since Tesla pioneered the field of wireless power transmission, many scholars at home and abroad have devoted themsel...

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Problems solved by technology

With the continuous expansion of the application field of wireless power transmission technology, close-fitting wireless charging has become increasingly unable to meet the needs of the public

In order to improve the transmission distance of the wireless power transmission system, many scholars at home and abroad have adopted the method of increasing the relay coil to increase the transmission distance of the system, but for the method of stabilizing the working frequency under the optimal transmission performance, especially when different numbers of loads are connected The frequency stabilization method has been studied by no one

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