Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Digital Control of an AC/DC Converter using the Power Balance Control Technique with Average Output Voltage Measurement

  • Wisutmetheekorn, Pisit (Dept. of Electrical Eng., King Mongkut's University of Technology North Bangkok) ;
  • Chunkag, Viboon (Dept. of Electrical Eng., King Mongkut's University of Technology North Bangkok)
  • Received : 2010.10.08
  • Accepted : 2011.10.11
  • Published : 2012.01.20
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Abstract

This paper presents a method for the digital control of a high power factor AC/DC converter employing the power balance control technique to achieve a fast response of the output voltage control. To avoid the effects of an output voltage ripple in the voltage control loop, the average output voltage is sampled and used as a feedback signal for the output voltage controller. The proposed control technique was verified by simulations using MATLAB/Simulink and its implementation was realized by a dsPIC30F4011 digital signal processor to control a CUK topology AC/DC converter with a 48V output voltage and a 250 W output power. The experimental results agree with the simulation results. The proposed control technique achieves a fast transient response with a lower line current distortion than is achieved when using a conventional proportional-integral controller and the power balance control technique with the conventional sampling method.

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References

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