Multi-receiving coil group structure for dynamic wireless charging and passive control algorithm

Abstract

A multi-receiving coil group structure for dynamic wireless charging and a passive control algorithm are characterized in that a primary side transmitting end coil of a wireless charging system and a receiving end secondary side coil on a trolley adopt double rectangular coils, each coil is composed of two small rectangular necklaces, and three magnetic cores are laid below the coil; the primary side transmitting end coils are laid on a path through which the trolley passes, and one transmitting coil is laid every other coil width; a secondary coil of the receiving end adopts two coils or four coils to form a coil group; pLECS software is adopted to verify the passive control constant-voltage constant-current charging of the trolley. According to the invention, the primary side coil and the secondary side coil can always have stable current mutual inductance in the moving process of the trolley. According to the invention, PI is combined with a passive control method to control the stability of the front-end voltage of the DC-DC circuit and the charging current of the load, specific data are obtained through circuit simulation, and whether the voltage and current value for stably controlling the charging of the load meet the standard or not is obtained.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a multi-receiving coil group structure and a passive control algorithm for dynamic wireless charging. Background technique [0002] With the rapid development of the logistics industry, the demand for intelligent handling is increasing. Through the use of intelligent handling vehicles, the corresponding work efficiency has been greatly improved and the operating cost has been reduced. The corresponding advantages are very obvious. Due to the advantages of small cars, users have higher requirements for their battery life, efficiency and safety of charging equipment. The traditional car is charged by a fixed plug, replacing the battery and charging by brushing the board. These methods may have potential safety hazards or affect work efficiency. Under such a background, the dynamic wireless charging technology of the car is safe and reliable and can improve The battery li...

AI Technical Summary

Problems solved by technology

The traditional car is charged by a fixed plug, replacing the battery and charging by brushing the board. These methods may have potential safety hazards or affect work efficiency. Under such a background, the dynamic wireless charging technology of the car is safe and reliable and can improve The battery life has been greatly developed

[0003] However, the existing dynamic wireless charging coil structure applied to the car is difficult to ensure that the mutual inductance value of the primary and secondary coils is constant during the dynamic charging process, and at the same time it is difficult to ensure the stability of the charging current during the movement of the car, which reduces the charging efficiency. , also can not meet the requirement of lithium battery constant current charging, which not only affects the charging efficiency, but also has a direct impact on the service life of lithium battery

Images