Dynamic Wireless Power Transmission Constant Power Output Control Strategy Based On Model Predictive Control

With the rapid development of the global economy,the demand for automobiles is on the rise every year,and low-carbon and green travel has become the theme of The Times.Global brands are increasing efforts to develop and produce new energy vehicles.Battery,as the power source of new energy vehicles,has attracted the attention of major companies,such as slow charging,short mileage,short battery life and a series of problems.Therefore,Dynamic Wireless Power Transfer(DWPT)technology has been proposed.New energy vehicles can charge while driving,which effectively solves the travel problem of electric vehicles.Charging while running is a dynamic process of new energy vehicles.The transmitting coil on the road surface and the receiving coil of the car move relative to each other.In this process,the mutual inductance of the two coils will change,which will further change the transmitted power,which will have an impact on charging efficiency and battery life.At this situation,a model predictive control algorithm is proposed to realize constant power charging of EV batteries.In this design,a dynamic radio energy transmission system is built,which can be divided into primary side power transmission system and secondary side power receiving system.The mains power is used at the power supply end,and the mains uncontrollable rectifier is then passed through the double E inverters to change the DC energy into high-frequency AC energy,and then the electric energy is transmitted through the transmitting coil.The secondary side electric energy receiving system includes: the receiving coil carried by the car receives the electric energy transmitted by the primary side and rectified the high-frequency AC electric energy into direct current electric energy through the rectifier.Finally,the required voltage is provided to the battery through the chopper.The software system uses the model predictive control algorithm,the model predictive control algorithm is mainly to establish a mathematical model of the system,the output power of the model prediction,by minimizing the objective function to obtain the optimal duty ratio of the expected output power of the double E inverter control,to achieve the battery constant power charging.This method is implemented in the primary side of the system,and does not need any measuring or communication equipment in the secondary side,which improves the reliability of the system and reduces the cost and complexity of the dynamic radio energy transmission system(DWPT)system.Model predictive control can also be used to achieve switch,compared to the traditional mechanical switch design,software switch design processing speed faster and more reliable.