The Single-tube Inverter ICPT Charging System For The Tracking Robot

The power battery of line follower robot uses contact charging method,the robot easily gets contact defect because of mechanical wear.To solve this problem,this paper researched in a type of single-switch inductively coupled power transfer(ICPT)charging system.This system adopted two-stage topology,the preceding stage was the single-tube inverter ICPT system,achieved the contactless charging operation.The post stage used Buck-Boost topology based on the charging management chip LTC4020 to realize quick-charging.Specific research contents are as follows.Firstly,the preceding stage single-tube inverter ICPT system was designed.The working principle of the single-tube ICPT system was described,and its equivalent circuit was established.The system was modeled and analyzed according to the equivalent circuit.The equivalent model of the coil was established to analyze the factors of the transmission efficiency of the original and secondary coil,and simulated the shape of the original and secondary coil,and then selected the optimal coil.The former system compensation circuit and the control circuit was designed.Secondly,the post stage lithium battery charge management circuit was designed.This paper described the working principle of Buck-Boost main circuit,designed the inductance for different working modes,calculated the switching loss and conduction loss of the switch,selected the optimal switch tube and designed the control circuit to protect the chip and the circuit.Design a variety of protection circuits for battery charging.Finally,the simulation and experiment of the single-tube inverted ICPT system and the lithium battery charging circuit were completed.Simulation and experimental results showed that the design of the robot with single-tube inverter ICPT charging system had reached the design requirements.