Mutual inductance optimization method of topological structure of dynamic wireless charging system of electromobile

Abstract

The invention discloses a mutual inductance optimization method of a topological structure of a dynamic wireless charging system of an electromobile. The method comprises the following steps that onetransmitting coil-to-four receiving coil structure system model is constructed; main parameters of coils are set, under shifting of different coils, according to a mutual inductance formula of one transmitting coil-to-one receiving coil, a mutual inductance value between each receiving coil and the corresponding transmitting coil is calculated; according to a total mutual inductance formula of a one-transmitting coil-to-four receiving coil structure, a total mutual inductance value is calculated; per unit processing is conducted on the mutual inductance value; whether or not a current per unitvalue meets the requirements is judged, the current per unit value is compared with a set value, and if the current per unit value is greater than the set value, the current total mutual inductance value, the current per unit value and the current main parameters of the coils are stored as set values; if the current per unit value is less than the set value, the main parameters of the coils are further adjusted until the current per unit value is larger than the set value. The method can achieve that when the receiving coils and the transmitting coil shift, the total mutual inductance betweenthe receiving coils and the transmitting coil is constant.

Description

technical field [0001] The invention relates to the field of wireless energy transmission, in particular to a mutual inductance optimization method for the topology structure of a dynamic wireless charging system for electric vehicles. Background technique [0002] The charging system is one of the core components of electric vehicles, and its performance directly affects the safety and convenience of electric vehicles. Currently, there are two main charging methods for electric vehicles: plug-in wired charging and wireless charging. The main problems of the plug-in wired charging method are as follows: (1) Due to the existence of charging sockets and cables, the flexibility of electric vehicle charging is greatly reduced; (2) The large charging current constitutes a potential danger of leakage and electric shock, It is easy to generate contact sparks, and the safety is not strong. The wireless charging method mainly transmits electric energy through a magnetic field, and ...

AI Technical Summary

Problems solved by technology

However, when the electric vehicle is parked and charged, the transmitting coil and the receiving coil will inevitably be offset, resulting in a change in the mutual inductance between the coils, which will cause a sharp fluctuation in the output voltage and a decrease in efficiency, endangering the safety of the dynamic wireless power supply system for electric vehicles sex and stability

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