EP 0955645 A3 20000816 - Electromagnetic ultraswift actuator without springs
Title (en)
Electromagnetic ultraswift actuator without springs
Title (de)
Ultraschneller Elektromagnetantrieb ohne Feder
Title (fr)
Actionneur électromagnétique ultrarapide sans ressorts
Publication
Application
Priority
IT GE980035 A 19980506
Abstract (en)
[origin: EP0955645A2] Electromagnetic ultraswift actuator without springs including a movable part (1) and a statoric element (7) coaxial to the movable part (1), being the movable part (1) free to axially move inside the statoric element (7) , a permanent magnet (5) having its magnetic poles (6) following each other along the longitudinal axis of the movable part (1), being the movable part (1) kept in a provided position through the magnetic field generated by the permanent magnet (5) and suitable stroke limiters (2, 3, 12, 13, 14, 16), and a statoric winding (9) coaxial to the permanent magnet (5) and excitable so that it interacts with the permanent magnet (5) magnetic field, characterized in that the magnetic field generated in the winding (9) excites the statoric part (7) polarizing it so that the permanent magnet (5) reacts together with the movable part (1) connected to it moving towards another provided position, so that the axial translation of the permanent magnet (5) and consequently of the movable part (1) is respectively caused: in one direction, just by spontaneous attraction (active magnet/passive ferromagnetic circuit) eventually reinforced through an auxiliary electromagnetic excitation. in the opposite direction, substantially by repulsion between polarities (active magnet/ active electromagnetic circuit) having the same sign. <IMAGE>
IPC 1-7
IPC 8 full level
H01F 7/16 (2006.01); H01F 7/122 (2006.01)
CPC (source: EP)
H01F 7/1615 (2013.01); H01F 7/122 (2013.01)
Citation (search report)
- [X] EP 0419352 A1 19910327 - SOLEX [FR]
- [DX] DE 3501193 A1 19860717 - BOSCH GMBH ROBERT [DE]
- [A] EP 0580117 A2 19940126 - TDK CORP [JP]
- [A] EP 0605903 A1 19940713 - TDK CORP [JP]
- [A] US 4785816 A 19881122 - DOW JULIAN [US], et al
- [A] EP 0390519 A1 19901003 - ISUZU CERAMICS RES INST [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 006, no. 037 (E - 097) 6 March 1982 (1982-03-06)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0955645 A2 19991110; EP 0955645 A3 20000816; EP 0955645 B1 20021120; AT E228265 T1 20021215; DE 69903991 D1 20030102; DE 69903991 T2 20030410; IT 1304369 B1 20010315; IT GE980035 A0 19980506; IT GE980035 A1 19991106
DOCDB simple family (application)
EP 99108019 A 19990423; AT 99108019 T 19990423; DE 69903991 T 19990423; IT GE980035 A 19980506