Application Research On Digital Twin Technology In Design Of Switching Power Supply

Digital twin technology plays an important role in the transformation from traditional manufacturing to intelligent manufacturing.It has a good application prospect in reducing the hardware cost and time cost in switching power supply design.The design on the magnetic elements is a typical instance.In most case,the magnetic elements are prepared and testified for several times.Actual operations of the magnetic elements can be simulated accurately with digital twin technique,and the efficiency of the design on magnetic element can be improved.Similarly,digital twin technique has good application prospect in the thermal design of power supplies.The applications of digital twin technique in the design of power supply are further studied in this thesis.The main works of the thesis are listed as follow1)The design and preparation on the protype of the Forward converter are realized.Based on the analysis for the working principles of the Forward converter,its power circuit is designed and verified by simulations implemented in PSIM software.The high-frequency transformer is designed in detail.Furthermore,the small signal model for the Forward converter under peak current control is derived.Design and verification for the control loop in Forward converter are finished.2)Digital twin models for the high-frequency transformer and thermal design of the Forward converter are established.With the practical size and material properties of the core,its3 D model is built in Maxwell package.Similar to the modeling on the core,the 3D model for the windings in the high-frequency transformer is established.To simulate the operation of the transformer precisely,the external circuit for the transformer is constructed with Simplorer package,in which the transformer is a core component.Based on the actual dimensions of the PCB and components in the Forward converter,the thermal simulation model is built.The achieved model is simplified based on the analysis for the cooling mechanism for the converter.3)Prototype testing for the Forward converter and verifications on the digital twin models are realized.The prepared protype of the Forward converter is tested,such as output voltage,ripple,line regulation and efficiency,which are the foundation for verifications on the digital twin models.With field-circuit coupled simulations,simulations on the digital twin model for the high-frequency transformer are performed.The magnetic field,electric field and losses in the transformer are deeply analyzed.Simulations and analysis on the temperature distributions for the converter are implemented also.Results in the thesis have certain reference value for application studies on the digital twin technique in the design on switching power supplies.