A control method for a short-segment dynamic wireless power supply system for an electric vehicle

Abstract

The invention discloses a control method of an electric vehicle short-segment dynamic wireless power supply system. The system is mainly composed of a frequency-adjustable high-frequency power source, transmitting terminal fixed compensation capacitors, square segmented transmitting coils, switching control switches, a square receiving coil, a receiving terminal fixed compensation capacitor and an electric vehicle load. In order to solve the problem that when a receiving coil is located between two transmitting coils, the receiving power is reduced due to the adoption of a single transmitting coil power supply mode, the transmitting terminal topological transformation and high-frequency power source frequency adjustment control method is provided. By the adoption of the system and the control method, it can be achieved that the electric vehicle continuously picks up energy in the driving process, the problem that the endurance of the electric vehicle is poor is effectively solved, and the method mainly solves the problem that when the receiving coil is located between the two primary coils, the receiving power is severely reduced.

Description

Technical field [0001] The invention relates to the field of wireless charging of electric vehicles, in particular to a novel segmented dynamic wireless power supply system for electric vehicles and a control method thereof. Background technique [0002] The rapid development of electric vehicles, automobiles are gradually getting rid of the dependence on fossil energy, from traditional vehicles to hybrid vehicles, and finally to pure electric vehicles. However, the energy density of current on-board batteries is still difficult to compare with gasoline. Although with the continuous advancement of electric energy storage technology, lithium-ion batteries have gradually replaced lead-acid batteries, and some problems have been improved. Electric vehicles still need large and heavy battery packs as power. Energy storage equipment and the relatively limited endurance of electric vehicles are still key factors restricting the development of electric vehicles. [0003] Wireless power t...

AI Technical Summary

Problems solved by technology

However, for the dynamic wireless power supply scheme for electric vehicles with a short segment structure, when the secondary coil is located in the middle of the two primary coils, if only a single primary coil is used for power supply, it is difficult to maintain a high level of reception due to large changes in the mutual inductance parameters. Power; if the short segment coils are all energized, the system loss will be greater

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