Title:
40 ° PHASE-SHIFTING AUTOTRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2005/109457
Kind Code:
A1
Abstract:
The invention relates to a transformer for converting three-phase power into nine-phase power, in particular for a rectifier. The inventive autotransformer is embodied in the form of a step-up or step-down transformer. For a step-down transformer, three-phase input terminals (E1,E2, E3) are delta-connected to one of main windings, mounted on the respective magnetic legs (M12, M23, M31) of a magnetic circuit. The leg main winding (B12) is provided with intermediate connections (K1,K'1, K''1) from which auxiliary windings (X31, Y23, Z31) mounted on the other legs extend away. Said auxiliary windings produce on output terminals (A1, B1, C1) voltages one of which is in phase with the supply three-phase voltage on the (E1), the other is +40° phase-shifted and the third is + 80° phase-shifted. The number of turns of the auxiliary windings and the position of the intermediate connections are calculated in such a way that said result is obtainable. The identical windings of the other legs produce other output voltages on terminals (A2,B2, C2, A3, B3) in such a way that a nine-phase system is embodied.
Inventors:
BRUZY CHRISTOPHE (FR)
BLANCHERY FRANCIS (FR)
MONROY GERARD (FR)
BLANCHERY FRANCIS (FR)
MONROY GERARD (FR)
Application Number:
PCT/EP2005/051304
Publication Date:
November 17, 2005
Filing Date:
March 21, 2005
Export Citation:
Assignee:
THALES SA (FR)
BRUZY CHRISTOPHE (FR)
BLANCHERY FRANCIS (FR)
MONROY GERARD (FR)
BRUZY CHRISTOPHE (FR)
BLANCHERY FRANCIS (FR)
MONROY GERARD (FR)
International Classes:
H01F30/02; H01F30/14; H02M7/06; (IPC1-7): H01F30/02; H01F30/14; H02M7/06
Foreign References:
| US5619407A | 1997-04-08 | |||
| US6191968B1 | 2001-02-20 |
Other References:
DATABASE WPI Section EI Week 198116, Derwent World Patents Index; Class X12, AN 1981-D5475D, XP002308108
Attorney, Agent or Firm:
Guerin, Michel (31-33 Avenue Aristide Briand, ARCUEIL Cedex, FR)
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