Research On Receiver Voltage Regulating Strategy Of Dynamic Load ICPT System

The principle of inductively coupled power transfer technology is to transfer the AC city through a series of rectifier and inverter,and transmit it to the receiving end through the magnetic field coupling from the transmitter.Contactless power supply technology is developing rapidly,especially after entering twenty-first Century.The research of ICPT technology mainly focuses on constant load regulated power supply.But with the increase of people's demand,dynamic multi-load power supply also appears.The dynamic load is the main load in the disturbance will increase the effect on the output voltage,the output voltage is not stable in the range required,and the load change will cause the jump and then trigger a circulation primary side circuit inverter circuit for high output voltage,resulting in transmission power is reduced,serious when the device will be burned or even cause a fire.In this regard,this thesis proves a new control strategy:load access or remove,the load parameter disturbance,reflected to the primary side of the impedance will change,which will change the voltage and current of the primary side of the transmitter through the acquisition of voltage and current to control the load voltage stability.This thesis starts with the study of the background of radio transmission technology,describes the research status and development trend of wireless charging system at home and abroad,and determines the purpose,significance and main content of the research.Secondly,the advantages and disadvantages of several existing power supply control strategies are analyzed.After that,the transmission topology and working process of ICPT system are introduced.On this basis,the basic principle and control method based on reflection impedance control strategy are introduced.Then,the simulation model based on mutual inductance theory is set up by simulation platform.The simulation results show that the load voltage under the constant load,the light load switch to the heavy load and the heavy load switch to the light load are verified,and the reflection impedance control strategy is verified.Finally,the design of the system hardware circuit,and the preparation of the software control part,set up a hardware experimental platform to verify the effectiveness of this regulator control strategy.The simulation waveforms and experimental results show that the voltage stabilizing control strategy based on reflected impedance can achieve the effect of load stabilization without software control via the addition of components.