Optimization Design Of Inverter Based On The Power Factor Correction And Soft Switch

Widely used in AC-DC-AC inverter based on improved performance improvementsbrought about by the increase in power factor correction and soft switching correction linkis proved by simulation and experiment, to reduce the harmonics of the inverter gridinjection and switching losses, and has a certain practical value. This method provides anew approach to drive the further promotion and development of lightweight. Researcheson frequency converter for AC motor modulation has gained continuously achievementwith the rapid development of power electronic technology. The traditional frequencyconverter produces severely pollution to the power grid, because of the harmonicinterference in rectification process, on the other hand, in order to reduce the weight andcost of converter, the carrier wave frequency was improved constantly which may causemore switching loss. Nowadays, the development of frequency converter is constrained byboth heat dissipation and switching loss problem.This paper proposes a optimized design for the AC-DC-AC frequency converter, which iswidely used at present days. A power factor correction segment is applied in the newdesigned converter, so that the harmonic pollution will be reduced significantly in thepremise of as much as possible to reduce cost. This paper proposed a3-phase doubleswitch circuit topology, which is simplified than the traditional topology, after acomprehensive comparison of various common active power factor correction circuits.The system possesses better robustness through adopting the inner voltage loop and outercurrent loop control, namely the double loop PI control.The proposed circuit adopts DSP TMS320F28335as the core controller, which cansimplify the circuit structure and grant the system great flexibility.The performance improvement by the soft switching technology and the factor correctionsystem of the new designed circuit, which is based on the AC-DC-AC frequency converter,has been proved through simulation and experiment, and this design also reduces theharmonic injection to the power grid and switching loss. This design provides a newmethod for the frequency converter development.