Ripple Suppression of Switching Power Supply based on Computer Simulation Software Multisim

This paper conducts the study on the ripple suppression of switching power supply based on the computer simulation software Multisim. Because switching power supply is a discrete and nonlinear system in essence, it is difficult to establish a unified model. In order to simplify the model, when the power system toolbox in Simulink software package running in Matlab environment is used to simulate and analyze the CLC filter circuit, the AC voltage signal and the assumed internal resistance of the power supply are used to replace the ripple noise of the switching power supply. However, it is very difficult in practical applications, such as the detection of the harmonic content of the system, how much to offset the harmonic content, real-time performance, and the active filter has switching devices that generate harmonics by themselves, etc. Therefore, from the cost of production and the cost of production. According to the control method, the passive filter is very suitable. Considering a certain margin in the design, it can be designed as a more general filter device. Hence, this paper provides the novel solutions of then dealing with the efficient data model. Through the simulation, the performance is validated.