Investigation of the AC/AC Buck-Boost Converter

Ivars Raņķis, Mārcis Priedītis


This paper reviews the possibility of implementing a buck-boost AC/AC converter with a changeable configuration, which ensures quasi-sinusoidal characteristics of source and load current. Load is made up of active and inductive components, with a parallel-connected smoothing capacitor whereas at the input stage a current-smoothing LC input filter is applied. The process is controlled by four bidirectional semiconductor switches, from which two are active in each of the operation modes. An explanation of electromagnetic processes in both of the operating modes is given, in order to show how the mathematical description of the circuit functionality is acquired. Computer simulation results are introduced as well, providing a comparison of calculated and simulated parameters at both the buck and boost operation cases. 


Bidirectional semiconductor switch; capacitors; coils; commutation; duty ratio; filters; ripples; position

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H. F. Ahmed, H. Cha, A. A. Khan, and H. G. Kim, “A Novel Buck-Boost AC–AC Converter with Both Inverting and Noninverting Operations and Without Commutation Problem,” IEEE Transactions on Power Electronics, vol. 31, no. 6, pp. 4241–4251, Jun. 2016.

X. Geng, H.-J. Tang, N. Jin, J.-Y. Lan, “Direct Buck-type AC-AC Converters using VSC Method,” Przegląd Elektrotechniczny, no. 89, pp. 257–261, 2013.

T. B. Soeiro, C. A. Petry, J. C. dos S. Fagundes, and I. Barbi, “Direct AC–AC Converters Using Commercial Power Modules Applied to Voltage Restorers,” IEEE Transactions on Industrial Electronics, vol. 58, no. 1, pp. 278–288, Jan. 2011.

N. Vazquez, A. Velazquez, and C. Hernandez, “AC Voltage Regulator Based on the AC-AC Buck-Boost Converter,” in 2007 IEEE International Symposium on Industrial Electronics, Jun. 2007, pp. 533– 537.

C. Aghion, M. Lucanu, O. Ursaru, and N. Lucanu, “Direct AC-AC Step- Down Single-Phase Converter with Improved Performances,” Electronics and Electrical Engineering, vol. 18, no. 10, pp. 33–36, Dec. 2012.

P. K. Banerjee, M. A. Choudhury, G. T. Rasul, “AC Voltage Regulation by Switch Mode Buck-Boost Voltage Controller,” 3rd Int. Conf. ICECE2004, Bangladesh. – pp. 351–354.

M. Lucanu, O. Ursaru, and C. Aghion, “Single phase AC choppers with inductive load and improved efficiency,” International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005, pp. 597–600.

P. Suskis and I. Raņķis, “Performance of a Voltage Step-Up/Step-Down Transformerless DC/DC Converter: Analytical Model,” Latvian Journal of Physics and Technical Sciences, vol. 49, no. 4, pp. 29–40, Jan. 2012.

P. Suskis and I. Raņķis, “Buck-Boost DC-DC Converter for Wind and Hydrogen Based Autonomous Energy Supply System,” in 2012 13th Biennial Baltic Electronics Conference, Oct. 2012, pp. 215–218.

P. Suskis and I. Raņķis, “Līdzsprieguma paaugstinošais un pazeminošais impulsregulators (DC step-down and step-up converter),” 56. LV 14551 B Latvijas patents. September 20, 2012.

D. Shirkin and I. Rankis, “Transformer based AC pulse regulation systems,” in 2014 55th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), Oct. 2014, pp. 52–55.

I. Rankis, M. Prieditis, and D. Shirkin, “Investigation of Electro- Magnetic Processes in a Transformer Based AC Pulse Modulation System,” Journal of Maritime Transport and Engineering, vol. 3, no. 2, pp. 45–50, 2014.

Rankis I., Vasilevics O. Estimation of Parameters of Network Filter for AC Pulse Regulator. Power and Electrical Engineering, N31, 2013 – Riga:RTU, pp. 91–94.

LV 14549 B Latvijas patents. Induktīvās reaktīvās slodzes kompensācijas sistēma. Autori O. Vasiļevičs, I. Raņķis; publikācija 20.10.2012.

DOI: 10.7250/pee.2017.006


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