Energy Metering And Condition Montoring For Electric Vehicle Dynamic Wireless Charging System

Compared with traditional contact charging metho ds,wireless energy transmission technology has features such as high security,high convenience and strong environmental adaptability,and is more applicable to the development trend of self-driving electric vehicles and smart transportation in the future,and has great research value.Application prospects.Compared to the more mature static wireless charging technology,dynamic wireless power supply technology leads the revolutionary development of electric vehicles,not only can reduce the use of vehicle power battery packs,but also can maximize the vehicle driving range.With the continuous deepening of research on dynamic wireless power supply technology,the importance of system state monitoring and human-computer interaction is increasing day by day.On the one hand,perfect system state monitoring is directly related to the reliability and stability of the overall system operation and system performance parameter records;on the other hand,a good human-computer interaction interface improves the operator’s comfort and experience and the charging process.automation.Therefore,the research of system state monitoring and human-computer interaction interface is very important for the development of dynamic wireless power supply system.Firstly,for the key parameters of system status monitoring such as system efficiency,system power,and energy metering,the impact of system offset and speed on key parameters is analyzed,and the power loss of each part of the system is studied.The rationality and necessity of system status monitoring are clarified.Based on this,the design of part of the electrical energy measurement circuit is completed,which mainly includes power frequency measurement,magnetic coupling mechanism energy measurement and system output energy measurement.In order to solve the difficult problem of voltage signal and current signal measurement caused by the high-frequency resonance characteristics of dynamic wireless power supply system,the application of high-frequency voltage signal and current signal acquisition and conditioning circuit was studied and applied to overvoltage and over-voltage of system condition monitoring.Flow protection.Second,the human-computer interaction interface mainly includes the ground end portion and the vehicle end portion.Via the WiFi module,the vehicle-side battery management system information is transmitted to the ground end for intuitive ground personnel to operate the system.At the same time,the system work information is transmitted to the onboard terminal through the WiFi module for the driver to view and operate the system.Finally,in order to verify the rationality of system status monitoring and human-computer interaction interface,static and dynamic testing of electric energy metering is performed on the dynamic wireless power supply system of the electric vehicle.The experimental results show the reliability of the monitoring system and the stability of the operation interface.