EP 0192915 A1 19860903 - Tansformer with a turn ratio variable while in operation.
Title (en)
Tansformer with a turn ratio variable while in operation.
Title (de)
Transformator mit im Betrieb veränderlichem Windungsverhältnis.
Title (fr)
Transformateur avec rapport de transformation variable pendant le fonctionnement.
Publication
Application
Priority
EP 85830050 A 19850227
Abstract (en)
Transformer with a turn ratio variable while in operation which has at least two wires (20,22) wound together on the same core, exactly interleaved and insulated with respect to each other, and on them there is formed a collector free from insulation, on which a contact metal brush (24) slides, that at every moment, during its movement, touches every wire (20,22) of the winding at the most at only one point. The ends of the wires (20,22) are connected to each other, possibly through impedances and the end inductances counteract the internal circulation current due to the turn short-circuit. At least one turn of at least one wire (20,22) of the winding is only partially linked with the total flux of the magnetic core of the transformer. By means of the use of at least another parted flux turn, the balancing of the voltage differences at the ends of the numerous wires is assured anyway, and the arrangement is such that each wire of the collector has the same voltage difference with respect to each of the two contiguous wires.
IPC 1-7
IPC 8 full level
H01F 29/06 (2006.01)
CPC (source: EP)
H01F 29/06 (2013.01)
Citation (search report)
- DE 1098603 B 19610202 - WANDLER & TRANSFORMATORENWERK
- DE 1281024 B 19690327 - SIEMENS AG
- US 3461379 A 19690812 - OKITA HIDEKI
- DE 1638530 B2 19740307
- DE 730390 C 19430111 - AEG
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 85830050 A 19850227