Clean Power

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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



V. Oleschuk*, V. Ermuratskii
Institute of Power Engineering of Moldova,
Academy Str. 5, Kishinau, MD-2028, Moldova,
e-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

In this paper, algorithms of the universal scheme of synchronous multi-zone modulation have been developed and disseminated for adjustment of two neutral-clamped inverters of double-delta-winding system (which is perspective for application in high power variable speed ac drives), providing synchronization and symmetry of waveforms of inverter-side voltage of power transformer for any control modes of operation including regimes with fractional relationship between the switching frequency of inverters and fundamental frequency of system. In this case inverter-side winding voltage of double-delta-winding system has quarter-wave symmetry, and its spectra do not contain even harmonics and undesirable subharmonics. Simulation results show behavior of system with two neutral-clamped inverters controlled by three basic versions of synchronous multi-zone modulation. References 9, figures 5, table 1.
Key words: inverter, ac drive, pulsewidth modulation.

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2. Park Y., Yoo J.-M., Sul S-K. Current regulation and fault tolerance in double-delta sourced transformer. IEEE Energy Conversion Congress and Exposition. ECCE’2015. Montreal, Canada, 2015. Pp. 1541-1548. DOI:
3. Park Y., Yoo J.-M., Sul S-K. Double-delta sourced winding for dual winding induction machine. IEEE Int’l Conf. on Power Electronics - ECCE Asia. ICPE-ECCE Asia. Seoul, Korea, 2015. Pp. 77-85. DOI:
4. Park Y., Sul S.-K. Pulsewidth modulation strategy in double-delta sourced winding. IEEE Energy Conversion Congress and Exposition. ECCE’2016. Milwaukee, USA. 2016. Pp. 1-8. DOI:
5. Park Y., Yoo J.-M., Sul S.-K. Vector control of double-delta sourced winding for a dual-winding induction machine. IEEE Trans. Ind. Appl. 2017. Vol. 53. No 1. Pp. 171-180. DOI:
6. Park Y., Yoo J.-M., Sul S.-K. Pulsewidth modulation strategy in double-delta sourced winding. IEEE Trams. Ind. Appl. 2018. Vol. 54. No 3. Pp. 2550-2559. DOI:
7. Oleschuk V. Profumo F., Tenconi A., Bojoi R., Stankovic A.M. Cascaded three-level inverters with synchronized space-vector modulation. IEEE Ind. Appl. Soc. Conf. IAS’2006. Tampa, USA, 2006, Pp. 595-602. DOI:
8. Oleschuk V., Griva G., Profumo F., Tenconi A. Synchronized PWM control of symmetrical six-phase drives. IEEE Int’l Conf. on Power Electronics. ICPE’2007. Daegy, Korea, 2007. Pp. 147-152. DOI:
9. Oleschuk V., Barrero F. Standard and non-standard approaches for voltage synchronization of drive inverters with space-vector PWM: A survey. International Review of Electrical Engineering. 2014. Vol. 9. No 4. Pp. 688-707.  DOI:

Received 28.02.2020