EP 0444522 A1 19910904 - Coil device.
Title (en)
Coil device.
Title (de)
Spulenanordnung.
Title (fr)
Dispositif de bobine.
Publication
Application
Priority
- JP 4883090 A 19900227
- JP 26425090 A 19901002
- JP 26425290 A 19901002
Abstract (en)
The present invention provides a coil device including magnetic cores having gaps at positions of at least opposing to each other in a magnetic path to be formed and a coil wound to include at least one of said gaps and its improvement consists in the fact that a shape of at least one of the opposing magnetic cores forming ;the gaps around which said coil is wound is made as a curve of logarithmic function from its base end to its extreme end and its most extreme end is provided with a gap adjusting flat surface. With such an arrangement as above, the present invention provides a coil device capable of reducing a leakage magnetic flux generated around the gaps, preventing an abnormal generation of heat of the coil and further preventing a bad influence of noise against a peripheral apparatus. <IMAGE>
IPC 1-7
IPC 8 full level
H01F 3/14 (2006.01); H01F 27/34 (2006.01); H01F 38/02 (2006.01)
CPC (source: EP)
H01F 3/14 (2013.01); H01F 27/346 (2013.01); H01F 38/023 (2013.01)
Citation (search report)
- [Y] US 3434085 A 19690318 - GANG ROBERT E
- [Y] FR 1490564 A 19670804 - RECH S MAGNETIQUES SOC D ETUDE
- [A] DE 3123006 A1 19830105 - ROEDERSTEIN KONDENSATOREN [DE]
- [A] AU 518715 A
- [A] US 3787790 A 19740122 - HULL C, et al
- [A] US 4282567 A 19810804 - VOIGT WILLIAM C
- [A] US 3566323 A 19710223 - GRAF RICHARD B, et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 4, no. 130 (E-25)(612) 12 September 1980, & JP-A-55 83210 (NIPPON DENSHI K.K.)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0444522 A1 19910904; EP 0444522 B1 19950517; DE 69109709 D1 19950622; DE 69109709 T2 19951005
DOCDB simple family (application)
EP 91102491 A 19910220; DE 69109709 T 19910220