Open AccessAssorted carrier‐variable frequency‐random PWM scheme for voltage source inverter
Author(s) -
Paramasivan Muthukumar,
Paulraj Melba Mary,
Balasubramanian Sankaragomathi
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0580
Subject(s) - pulse width modulation , sine wave , inverter , voltage , harmonic , noise (video) , electronic engineering , modulation (music) , computer science , harmonic spectrum , power (physics) , control theory (sociology) , engineering , electrical engineering , physics , acoustics , harmonics , control (management) , quantum mechanics , artificial intelligence , image (mathematics)
This study presents an assorted carrier‐variable frequency random pulse width modulation (AC‐VF‐RPWM) method in which a new type of mixed carrier wave is proposed for a three‐phase voltage source inverter‐fed induction motor drive. This study has focused on the reduction of acoustic noise where a deterministic PWM strategy is replaced with a proposed RPWM. Inverted sine carrier, sine carrier and triangle carrier are used to compare with the reference sinusoidal wave to generate the pulse (lead and lag) positions. The two groups (lead and lag) each with three pulse positions are randomly selected and it aims at dispersing the harmonic voltage over a wide band area. The linear feedback shift register‐based random bit generation algorithms are used to select the three pulse positions from the lead and lag groups. In addition, a frequency modulator converts the carriers into a randomised frequency, which will give more potency to the randomisation process. The results of co‐simulation and experimental evaluation that the proposed method could provide harmonic power spectra of the voltage and current spreading over a much broader band area, as compared with the conventional schemes. In addition, Xilinx XC3S500E FPGA device synthesis results are presented.