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Determination of leakage inductances of three-winding transformer for HF-PSA resonant circuitŠklovski, Jevgeni; Janson, Kuno; Niilo, Helar11th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 16-21, 20122012 / p. 113-116 : ill

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Development and verification of the resonant converter with parametrical alternation of resonant tank topology for constant-power manual arc weldingŠklovski, Jevgeni; Janson, Kuno; Niilo, HelarProceedings of the 13th International Scientific Conference Electric Power Engineering 2012 : EPE 2012 : Brno. Vol. 22012 / p. 1071-1076 : ill

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Problems in the operation of parallel-series converter when using two switch forward inverterNiilo, Helar; Vaimann, Toomas7th International Conference-workshop Compatibility and Power Electronics : CPE 2011 : Tallinn, Estonia, June 3, 2011 : student forum2011 / p. 28-33 : ill

book article

2 switch forward inverter for parallel-series resonance alternating (PSA) converter for supplying electric welding arcNiilo, Helar; Vaimann, Toomas10th International Symposium "Topical Problems in the Field of Electrical and Power Engineering”. Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 10-15, 20112011 / p. 140-144 : ill

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