dsp based Ac DC converter
[Downloaded from www.aece.ro on Tuesday, January 07, 2014 at 04:31:03 (UTC) by 115.248.181.130. Redistribution subject to AECE license or copyright. Online distribution is expressly prohibited.]
Advances in Electrical and Computer Engineering
Volume 11, Number 2, 2011
DSP Based Control Implementation of an AC/DC Converter with
Improved Input Current Distortion
Pisit WISUTMETHEEKORN, Viboon CHUNKAG
Electrical Engineering Department,King Mongkut’s University of Technology North Bangkok, Thailand
S5010190048@kmutnb.ac.th , vck@kmutnb.ac.th
1
Abstract—This paper presents a digital signal processor based control of an AC/DC converter with nearly unity power factor. Normally, the output voltage of a single-phase AC/DC converter comprises a voltage ripple with twice line-frequency.
This affects the voltage control loop and leads to the converter input current distortion. The purposed method is designed to avoid the effect of the output voltage ripple. To verify the proposed control method, MATLAB/Simulink is used for system simulation. A hardware prototype is setup. A low cost digital signal processing chip dsPIC30F4011 is employed as a digital controller to control a CUK AC/DC converter. The converter specifications are 48V output voltage and 250W output power. From the simulation and the experimental results shown that the input current distortion of the purposed system is reduced and lower than the AC/DC converter that controlled by the conventional proportional-integral controller.
Index Terms—AC/DC converter, converter, digital control, digital signal processing chip, power factor correction
I. INTRODUCTION
From the harmonic problem in utility system, the limit current of each harmonic order of load current has been defined in an international standard harmonics regulation.
Electronic equipment which consists of a rectifier circuit is an example of the equipment that draws harmonic currents from the AC line. Therefore the
Advances in Electrical and Computer Engineering
Volume 11, Number 2, 2011
DSP Based Control Implementation of an AC/DC Converter with
Improved Input Current Distortion
Pisit WISUTMETHEEKORN, Viboon CHUNKAG
Electrical Engineering Department,King Mongkut’s University of Technology North Bangkok, Thailand
S5010190048@kmutnb.ac.th , vck@kmutnb.ac.th
1
Abstract—This paper presents a digital signal processor based control of an AC/DC converter with nearly unity power factor. Normally, the output voltage of a single-phase AC/DC converter comprises a voltage ripple with twice line-frequency.
This affects the voltage control loop and leads to the converter input current distortion. The purposed method is designed to avoid the effect of the output voltage ripple. To verify the proposed control method, MATLAB/Simulink is used for system simulation. A hardware prototype is setup. A low cost digital signal processing chip dsPIC30F4011 is employed as a digital controller to control a CUK AC/DC converter. The converter specifications are 48V output voltage and 250W output power. From the simulation and the experimental results shown that the input current distortion of the purposed system is reduced and lower than the AC/DC converter that controlled by the conventional proportional-integral controller.
Index Terms—AC/DC converter, converter, digital control, digital signal processing chip, power factor correction
I. INTRODUCTION
From the harmonic problem in utility system, the limit current of each harmonic order of load current has been defined in an international standard harmonics regulation.
Electronic equipment which consists of a rectifier circuit is an example of the equipment that draws harmonic currents from the AC line. Therefore the
References: Power Electron, vol.21, no. 6, pp.1745–1753, Nov. 2006. Computer Engineering, vol. 10, no. 1, pp. 59-62, 2010. [Online]. Power Electron., vol. 19, no. 6, pp. 1474–1485, Nov. 2004.