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Harmonic Reduction in Single Phase AC-AC Converter


  • Department of Electrical and Electronics Engineering, School of Engineering, G D Goenka University, Gurgaon - 122103, Haryana, India
  • Department of Electrical,Faculty of Engineering and Technology, Gurukula Kangri Vishwavidyalaya, Haridwar - 249404, Uttarakhand, India


Objective: To design the trapezoidal pulse width modulation (TPWM) technique in order to reduce the total harmonic distortions at the output of the converter particularly the AC-AC frequency converter. Methods/Analysis: The proposed scheme of modulation technique is used as a modification as compared to that of an unmodulated converter. Two different parameters, namely frequency of the output from the converter and the frequency of the carrier wave, were varied to obtain the harmonic profile of the output voltage of the converter. Results were verified using MATLAB/SIMULINK software environment. Findings: The generalized 1 ϕ AC-AC frequency converter discussed, can be operated both as cyclo-converter (step down) and cyclo-inverter (step up). The output from these converters contain high THD values at the output. The techniques of filtering cannot be used due to numerous reasons. So the TPWM technique is implemented on the frequency converters. The least THD obtain was 0.983 % at 250 Hz for a step up configuration and THD was about 0.8019 % at 25 Hz in case of a step down converter. In addition to varying the output frequency, carrier frequency, fc, of the carrier wave was also varied to check the THD response of the converter and it was least at 1 kHz of about 0.9316 %. In all case, magnitude of output voltage was on higher side of fundamental frequency component. Novelty/Improvement: Simulation results shows that the THD values have been reduced with the application of modulation techniques as compared to that of the output from an unmodulated converter which can help in various application requiring AC-AC converters.


Cyclo-Converter, Cyclo-Inverter, Matrix Converter, Total harmonic distortion (THD), Trapezoidal Pulse Width Modulation Technique (TPWM)

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  • Prasad NE, Phoivos DZ, James FL. Programmed PWM techniques to eliminate harmonics. IEEE Transaction on Industry Applications. 1990 Mar/Apr; 26(2):302–16.Crossref
  • Quaicoe JE, Dewan SB. Clamped Six-Pulse Cyclo-inverter with a series tuned load. IEEE Transaction on Magnetics.1985 Sep; 21(5):1717–9. Crossref
  • Ziogas PD. The Delta Modulation Technique in Static PWM Inverters. IEEE Transactions on Industry Applications, 1981 Mar; 17(2):199–204. Crossref
  • Christiansen CF, Valla MI, Rivetta CH. A synchronization technique for static delta-modulated PWM inverters.IEEE Transactions on Industrial Electronics. 1988 Nov; 35(4):502–7. Crossref
  • Agrawal A, Agarwal V. Delta modulated cycloinverter. INTELEC 2008. IEEE 30th International
  • Telecommunications Energy Conference; 2008, San Diego, CA. 2008. p. 1–6. Crossref
  • Agarwal A, Agarwal V. Design of Delta-Modulated Generalized Frequency Converter. IEEE Transactions on Industrial Electronics. 2010 Nov; 57(11):3724–9. Crossref
  • Agarwal V, Agarwal A. FPGA based delta modulated cyclo-converter. PEOCO 2011. 5th International Power Engineering and Optimization Conference; 2011, Shah Alam, Selangor. 2011. p. 301–5. Crossref
  • Singh N, Agarwal V. Delta-Modulated AC–AC Converter for PM WECS. IEEE Transactions on Industrial Informatics.2015 Dec; 11(6):1422–34. Crossref
  • Lee MY, Wheeler P, Klumpner C. Space-Vector Modulated Multilevel Matrix Converter. IEEE Transactions on Industrial Electronics. 2010 Oct; 57(10):3385–94. Crossref
  • Ahmed I, Borghate VB, Matsa A, Meshram PM, Suryawanshi HM, Chaudhari MA. Simplified Space Vector Modulation Techniques for Multilevel Inverters. IEEE Transactions on Power Electronics. 2016 Dec; 31(12):8483–99. Crossref
  • Agarwal A, Agarwal V. Staircase modulated AC to AC converter.ICPCES 2010. IEEE International Power, Control and Embedded Systems Conference, Allahabad, India.2010. p. 1–5. Crossref
  • Biswas A, Jaiswal JL, Agarwal V. A study of staircase modulation technique for single phase matrix converter.ICPCES 2012. 2nd IEEE International Power, Control and Embedded Systems Conference, Allahabad, India. 2012. p.1–6. Crossref
  • Agarwal V, Nema S. Resonant AC to AC converter.Proceedings of IEEE International Symposium on Industrial Electronics, Dubrovnik, Croatia. 2005; 2:495–8. Crossref
  • Ayob SM, Salam Z, Jusoh A. Trapezoidal PWM Scheme for Cascaded Multilevel Inverter. IEEE International Power and Energy Conference, Putra Jaya. 2006. p. 368–72. Crossref
  • Schiop A, Trip D. Analysis of the Trapezoidal Modulation for Current Source Inverters. International Symposium on Signals Circuits and Systems. 2007. p. 1–4. Crossref
  • Holmes DG, Lipo TA. Implementation of a controlled rectifier using AC-AC matrix converter theory. IEEE Transactions on Power Electronics. 1992 Jan; 7(1):240–50. Crossref
  • Wells JR, Geng X, Chapman PL, Krein PT, Nee BM.Modulation-Based Harmonic Elimination. IEEE
  • Transactions on Power Electronics. 2009 Jan; 22(1):336–40. Crossref
  • Agarwal V, Kumar A, SinghR, Robin TJ. Modified PWM schemes for Cyclo-inverters. International Power Engineering Conference. 2007. p. 655–60. PMid:17845325
  • Jaiswal JL, Biswas A, Agarwal V. Implementation of Single phase matrix converter as generalized single phase converter.ICPCES 2012. 2nd IEEE International Power, Control and Embedded Systems Conference, Allahabad, India. 2012. p. 1–6. Crossref


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