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- Title
Bipolar and unipolar schemes for confined band variable switching frequency PWM based inverter.
- Authors
Attia, Hussain; Hang Seng Che; Tan Kheng Suan Freddy; Elkhateb, Ahmad
- Abstract
The single phase inverter performance through the unipolar and bipolar strategies has been previously analyzed based on the constant switching frequency pulse width modulation (CSFPWM). However, the confined band variable switching frequency PWM (CB-VSFPWM) is currently proposed as a new variable switching frequency PWM technique through unipolar strategy to facilitate the design of high order filter, to reduce the switching losses, and to reduce the current total harmonics distortion (THD) as well. To evaluate the performance of a single phase inverter based on the CBVSFPWM through bipolar strategy, this paper presents a comparative study of the CB-VSFPWM based inverter performance using the unipolar PWM and the bipolar PWM strategies. The study adopts MATLAB/Simulink to simulate the inverter and to analyze the simulation results in terms of harmonics spectrum, total harmonic distortion (THD), and fundamental components. The analysis of the study results gives an indication about the appropriate type of CB-VSFPWM strategy (unipolar PWM or bipolar PWM) to guarantee the desired performance of the connected inverter in terms of the electrical grid standards like THD, and harmonics spectrum of the inverter current.
- Subjects
PULSE frequency modulation; PULSE width modulation; PULSE width modulation inverters; ELECTRIC power distribution grids; ELECTRIC inverters
- Publication
International Journal of Electrical & Computer Engineering (2088-8708), 2021, Vol 11, Issue 5, p3763
- ISSN
2088-8708
- Publication type
Article
- DOI
10.11591/ijece.v11i5.pp3763-3771