Research On Control And Input Current Ripple Suppression Of High Frequency Link Inverter

Compared with traditional inverters with line-frequency transformers,high frequency link inverters has its unique strongponit such as low weight,low noise,fast dynamic response and high static performance.This paper begins with the study of high frequency link inverter's operation and it's digital control using DSP(Digital Signal Processor) and CPLD,proposes a center-align double sinusoidal pulse width synchronous modulation strategy.The input current ripple of inverter reduces the output capacity of electric sourse,and the other loads connected to the electric sourse may not work normally because if it.So it is necessary to reduce the input current ripple.As the traditional passive power filter has its defects,this paper lays a strong emphasis on the study of the active power filter.An important aspect of the performance of active pover filter concerns the control strategy used.The unified constant-frequency intergration(UCI) controller feature simpler circuitry,fast responsibility and high performance.So more and more concern is focused on this control strategy.In this thesis,firstly,the theory of one cycle control is introduced.Then the APF main circuit and the control circuit are introduced.Finally,an APF prototype is made.The experiment results indicate the feasibility of the APF with constant-frequency intergration control.