FIELD: power converter engineering.
SUBSTANCE: proposed voltage inverter has two identical single-channel three-phase voltage inverters 1, 2. Outputs 3, 4, 5 of inverter 1 and outputs 6, 7, 8 of inverter 2 are connected to unlike-phase and unlike-polarity leads of phase windings 9, 10, 11, 12, 13, 14 of three-phase filter-transformer 15 and their other leads are connected to like-phase and like-polarity leads of primary windings 16, 17 disposed on first leg 18, to leads of windings 19, 20 disposed on second leg 21, and to leads of windings 22, 23 of three-leg magnetic core of three-phase matching transformer assembly 25. Windings 16, 19, and 22 are interconnected in star with neutral brought out and connected to respective windings 9, 11, 13 of filter-transformer 15. Windings 17, 20, 23 are interconnected in delta and connected to respective windings 10, 12, 14 of filter-transformer 15. Outputs of control units 27 and 28 are connected to control inputs of voltage inverters 1 and 2, respectively. Control unit 27 is connected to phase-shift unit 29 and the latter is connected to control unit 28. Equal-waveform and magnitude voltages are applied to like-phase windings 16, 19, 22 and 17, 20, 23 of three-phase matching transformer assembly 25 and these windings carry equal currents. In the process potential difference between single-channel voltage inverters 1,2 and resultant voltages applied to primary windings 16, 19, 22 and 17, 20, 23 of matching unit 26 is built up across windings 9 through 14 of filter-transformer 15.
EFFECT: reduced size and mass, improved electromagnetic compatibility.
1 cl, 2 dwg
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Authors
Dates
2005-02-27—Published
2003-10-01—Filed