EP 0254727 B1 19910320 - TRANSFORMER, ESPECIALLY FOR A DRIVER STAGE
Title (en)
TRANSFORMER, ESPECIALLY FOR A DRIVER STAGE
Publication
Application
Priority
- DE 3546377 A 19851231
- DE 3546410 A 19851231
Abstract (en)
[origin: WO8704297A1] A driver stage, especially for a power switch transistor (210) comprises an auxiliary power supply (202), a current regulator (212) for the base current of the switch transistor and an overdrive, preferably with a logic processor (218). A shell-type transformer (230) having a ferromagnetic core and at least one primary and one secondary coil is used as a switching voltage and power transformer for the positive base current. Its core is as gap-free as possible and at least one coil has the form of a foil. The primary and secondary coils of the transformer are wound on each other, with an intermediate insulating layer, forming cylindrical coils. Each current-conducting part-winding of the primary coil adjoins a current-conducting part-winding of the secondary coil.
IPC 1-7
IPC 8 full level
H01F 19/04 (2006.01); H01F 19/08 (2006.01)
CPC (source: EP)
H01F 19/08 (2013.01)
Citation (examination)
- Schaltnetzteile; Joachim Wustehube, expert Verlag, D-7031 Grafenau,Seiten 354-357
- SIEMENS Schaltbeispiele, Ausgabe 1978/79, Seiten 189-191
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8704297 A1 19870716; AT E61885 T1 19910415; DE 3678289 D1 19910425; EP 0254727 A1 19880203; EP 0254727 B1 19910320; JP S63501909 A 19880728
DOCDB simple family (application)
DE 8600526 W 19861231; AT 87900068 T 19861231; DE 3678289 T 19861231; EP 87900068 A 19861231; JP 50054787 A 19861231