Research On Robust Control Of High Frequency Power Supply Of Ozone Generator

Ozone is an isomer of oxygen,which is composed of three oxygen atoms,and it is easy to decompose into oxygen at room temperature.Ozone has strong oxidation and sterilization ability and does not produce secondary pollution,which is a good oxidant and disinfectant.At present,domestic and foreign scholars have conducted in-depth research on the physical and chemical properties and preparation methods of ozone,and have achieved a series of results,which provide a solid theoretical basis for the practical application of ozone.The ozone produced by Dielectric Barrier Discharge has a large yield and high concentration,so it is widely used in the field of industrial ozone preparation.most of the equipment using this method to prepare ozone is still based on open-loop control,which is not conducive to the stable operation and long-term work of the equipment.Therefore,the control method of the system needs to be further studied.Based on the dielectric barrier discharge method and adopting the plate-type discharge chamber structure,this paper uses a power MOSFET tube to develop a highfrequency,miniaturized ozone generator with a frequency of 20 kHz.First,analyze and model the load of the plate-type ozone generator,and convert the nonlinear model into a linear model.Secondly,in order to improve the steady-state performance and dynamic regulation characteristics of the ozone generator system,a robust control method is used to close-loop control the power of the ozone generator to achieve the corresponding dynamic performance indicators and improve the stability of the system.Then use Matlab to build a simulation model to verify whether the designed robust controller meets the corresponding index requirements.At the same time,the designed robust control is compared with PI control to further prove the feasibility of the control method used in this article and the system Robust performance improvement.Finally,the designed controller is deployed to the actual system to verify whether the designed robust controller is in line with the actual application.Through the simulation results,it can be concluded that when the load parameters fluctuate,the system can quickly adjust and ensure the stability of the output.When interference occurs,the system can also suppress the interference and ensure the stability of the output.Finally,it can be concluded from the operating results of the actual system that the use of a h-infinity robust controller can ensure the stable operation of the ozone generator system,which is beneficial to the long-term operation of the system.