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Multiple feedback-control-loops for single-phase full-bridge PWM inverter


Affiliations
1 Associate Professor, Department of Electrical & Electronics Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore – 575 025, India
2 PG Student, Associate Professor, Department of Electrical & Electronics Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore – 575 025, India
     

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This paper presents a multiple feedback-loop-control technique for a single-phase full-bridge PWM inverter with output LC filter. The main challenge for an Uninterruptible Power Supply (UPS) is to maintain a high quality sinusoidal voltage under non-linear load conditions as most of the electronic loads are non-linear in nature and for that it needs to be controlled. Multiple feedback consists of two control-loops; one for capacitor voltage and other for inductor current-control. Output voltage and load curren-feedforward-control is used. This technique reduces the distortion in the inverter output voltage and brings it closer to a sine wave. The control concept has been verified using Matlab/SimulinkTM toolbox and the simulation results are obtained with different types of loads.

Keywords

UPS, analog control, feed forward control.
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  • Multiple feedback-control-loops for single-phase full-bridge PWM inverter

Abstract Views: 252  |  PDF Views: 0

Authors

Jora M. Gonda
Associate Professor, Department of Electrical & Electronics Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore – 575 025, India
A. Londhe Apurva
PG Student, Associate Professor, Department of Electrical & Electronics Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore – 575 025, India

Abstract


This paper presents a multiple feedback-loop-control technique for a single-phase full-bridge PWM inverter with output LC filter. The main challenge for an Uninterruptible Power Supply (UPS) is to maintain a high quality sinusoidal voltage under non-linear load conditions as most of the electronic loads are non-linear in nature and for that it needs to be controlled. Multiple feedback consists of two control-loops; one for capacitor voltage and other for inductor current-control. Output voltage and load curren-feedforward-control is used. This technique reduces the distortion in the inverter output voltage and brings it closer to a sine wave. The control concept has been verified using Matlab/SimulinkTM toolbox and the simulation results are obtained with different types of loads.

Keywords


UPS, analog control, feed forward control.



DOI: https://doi.org/10.33686/prj.v12i1.189300