| In recent years,with the rapid development of new energy sources and the urgent need for energy transformation,power electronics technology has been more and more widely used in the power field.Among them,insulated gate bipolar transistor,as an important power semiconductor device,has the advantages of fast switching speed and flexible control,and is widely used in power electronic conversion,regulation and control systems.It plays an important role in power electronics technology.However,due to the extremely high voltage and current change rate during the turn-on and turn-off of the IGBT module,the electromagnetic compatibility problem is becoming more and more prominent.The electromagnetic interference generated by the IGBT often affects the normal operation of nearby electronic equipment.At the same time,as an important component for transmitting electric energy in the power electronic conversion device,the busbar will also generate strong electromagnetic interference during operation due to its high current and high frequency operating characteristics.In order to improve the electromagnetic compatibility inside the power electronic device,this paper conducts the following research on the electromagnetic interference characteristics of the IGBT module and the busbar:First of all,this paper points out the source of its electromagnetic interference through the simulation analysis of the working characteristics of the IGBT module.Then,a three-dimensional simulation model of the IGBT module and its radiator was established on the Ansys simulation platform,and the electromagnetic interference characteristics of the IGBT module and the radiator during the turn-on and turn-off processes were studied based on the finite element analysis method.The distribution of the surrounding interference magnetic field and the variation law of the magnetic field intensity at different positions are obtained.The simulation results obtained can be used to optimize the layout of components inside the power electronic device and improve the electromagnetic compatibility of the equipment.Afterwards,this paper introduces the physical information neural network,and proposes the method of solving Maxwell’s equations by using the physical information neural network to calculate the distribution of the interference magnetic field generated by the busbar.Compared with the traditional finite element method,the PINN neural network method has higher calculation efficiency and can accurately calculate the disturbance magnetic field distribution of the busbar.The simulation results show that the method proposed in this paper can effectively solve the problem of busbar electromagnetic field distribution calculation,and can well simulate the electromagnetic field characteristics of busbar,which provides new ideas and methods for engineering practice in related fields.Therefore,the research in this paper is of great significance for further understanding the electromagnetic field distribution characteristics of the busbar and the engineering practice of PINN in the field of electromagnetic field. |
