Three-phase autotransformer with a balancing function

Details Three-phase autotransformer with a balancing function Three-phase autotransformer with a balancing function

1994-10-19

1996-11-12

Brown, Brian W.

Inductor devices

Polyphase

336155, 336178, H01F 1702

Patent

active

055744184

ABSTRACT:
A three-phase autotransformer improving balance of three-phase voltages and currents. An iron core has three legs corresponding to the three phase. A common winding and/or a serial winding of each phase includes three coils. Two of the three coils are wound on the same leg associated with the phase of the coils, and the other one coil is wound on another leg. The two coils and the other one coil are connected in series to generate magnetic flux in the opposite directions. Since the common winding and/or the series winding includes coils which are wound on different legs associated with different phases, and which generate flux in opposite directions, the balance of three-phase input voltages and currents, and output voltages and currents is automatically maintained.

REFERENCES:
patent: 4766365 (1988-08-01), Bolduc et al.
Barry J. Parker et al., Proceedings of the 27th Intersociety Energy Conversion Engineering Conference, vol. 2, Aug. 1992, pp. 2461-2466; `Electromagnetic Components for Aerospace Electric Power Systems`, p. 2465, FIG. 4-6.
Hitachi Seisakusho K.K. et al., Autotransformer With Phase-Shifting Winding, vol. 7, No. 194 (E-195) (1339) Aug. 24, 1983.

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