The Paton Welding Journal, 2012, №07



2012 №07 (08)

2012 №07 (10)

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The Paton Welding Journal, 2012, #7, 35-37 pages  

THREE-PHASE INVERTER POWER SOURCE WITH DIRECT CONVERSION AND INCREASED POWER FACTOR

V.V. BURLAKA and S.V. GULAKOV

Priazovsky State Technical University, Mariupol, Ukraine
 
 
Abstract
Topology of a converter with high-frequency transformer decoupling and three-phase input without intermediate rectification of input voltage is proposed. Application of direct conversion principle allows reducing the number of elements in the inverter power circuit, thus increasing its efficiency. In addition, application of a special algorithm of switch control allows achievement of input power factor close to a unity.
 
 
Keywords: arc welding, inverter power source, power factor, modelling, direct conversion
 
 
Received:                04.03.12
Published:               28.07.12
 
 
References
1. Korotynsky, A.E. (2002) State-of-the-art, tendencies and prospects of development of high-frequency welding converters (Review). The Paton Welding J., 7, 44-49.
2. Rudyk, S.D., Turchaninov, V.E., Florentsev, S.N. (1999) Power single-step converter of dc voltage with «soft» commutation of power switch. Elektrotekhnika, 4, 55-58.
3. Rudyk, S.D., Turchaninov, V.E., Florentsev, S.N. (1998) Advanced welding current sources. Ibid., 7, 8-13.
4. Itoh, J., Iida, T., Matsumura, D. (2007) High efficiency high-frequency link converter with AC/AC direct converter technology. IEEJ Transact. on Electrical and Electron. Eng. D, 127(8), 822-828.
5. Burlaka, V.V., Gulakov, S.V. Three-phase rectifier of welding current with direct conversion. Pat. 92420 Ukraine. Int. Cl. H02H 7/09. Fil. 17.07.2009. Publ. 25.10.2010.

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