Friday, 27 November 2015

HPF RECTIFIER USING THE MODIFIED SEPIC CONVERTER

  • The theoretical and experimental analysis of a modified version of the SEPIC  dc–dc converter used as preregulator operating in discontinuous conduction mode (DCM) is presented .
  •  The proposed converter presents a low input current ripple operating in DCM, and the switch voltage is lower than the output voltage.



                                                            SEPIC CONVERTER



  • The switch voltage reduction increases the converter reliability and a low drain-to-source on-resistance (RDSon ) MOSFET can be used depending on the converter specification.
  •  Moreover, a digital control technique is applied to the proposed converter in order to reduce the third-harmonic input current distortion resultant of the operation in DCM. Finally, a 100-W prototype was developed operating with efficiency equal to 95.6%..



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