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Advances in Electrical and Computer Engineering
Volume eleven, Number 2, 2011
DSP Centered Control Implementation
of an AC/DC Converter with
Improved Insight Current Bias
Pisit WISUTMETHEEKORN, Viboon CHUNKAG
AbstractвЂ”This paper presents an electronic signal processor
based charge of an AC/DC converter with nearly oneness power
element. Normally, the output voltage of a single-phase AC/DC converter includes a voltage ripple with twice line-frequency. This influences the volt quality control trap and contributes to the converter input current distortion. The purposed method is designed to avoid the effect of the outcome voltage ripple. To validate the proposed control technique, MATLAB/Simulink is employed for
system simulation. A hardware model is set up. A low cost digital signal finalizing chip dsPIC30F4011 is employed as a digital control to control a CUK AC/DC converter. The
converter requirements are 48V output volt quality and 250W
output electricity. From the ruse and the experimental
results proven that the suggestions current bias of the purposed system is reduced and below the AC/DC converter that
controlled by the regular proportional-integral controller. Index TermsвЂ”AC/DC converter, converter, digital control,
digital signal processing chip, power component correction
My spouse and i. INTRODUCTION
Through the harmonic problem in utility system, the limit
current of each harmonic buy of weight current have been
defined in an international regular harmonics rules.
Electronic equipment which consists of a rectifier circuit is a good example of the equipment that draws harmonic currents
from the AC collection. Therefore the AC/DC converters with
power aspect correction - were proposed to minimize
the harmonic currents. By flexible of by using a programmable
equipment such as a microcontroller, a processor, a field pre-reglable gate mixture (FPGA) and a digital sign
processor (DSP) as a digital controller, then this power
converter that controlled by the digital control has many positive aspects over the convsersion app controlled by an analog
circuit. The control formula in a digital controller could be easily changed or current to increase the performance of the converter by reprogram the programmable recollection of the
digital controller. Furthermore the modern microcontrollers
and digital signal cpus usually have a built in
communication interface that can be used for any supervisory
control or a system monitoring purpose .
Generally the result voltage of the power component
correction (PFC) circuit will not contain simply a pure DC
ac electricity but it also contains a double series frequency volts ripple on the output. From your concept of the multiplier structured PFC
signal as in , the control coils are an input current trap This job was supported by the Graduate School and the Faculty of Engineering of King Mongkut's University of Technology North Bangkok, Asia
and an output voltage loop. The output voltage trap is used
to manage the output voltage to a wanted level as well as the inner current loop can be used to control the input current of a PFC
circuit to follow along with a rectified line volt quality waveform for any high power factor goal. The output ac electricity control trap
should be created to have a closed loop band width about
twelve to 20 Hz for a low input current distortion from the AC/DC
converter, then the voltage loop transitive response is usually slow. Various solutions had been proposed to enhance only the energetic
response in the AC/DC ripping tools. The digital notch filtration system
 continues to be implemented to filter the voltage ripple from
the feedback signal that provided for the output ac electricity controller. The dead area digital...
Referrals: Power Electron, vol. twenty-one, no . 6, pp. 1745вЂ“1753, Nov. 2006.
Computer Engineering, vol. twelve, no . 1, pp. 59-62, 2010. [Online].
Electric power Electron., vol. 19, number 6, pp. 1474вЂ“1485, Nov. 2004.