EP 1634362 A1 20060315 - IRONCORE LINEAR BRUSHLESS DC MOTOR WITH REDUCED DETENT FORCE
Title (en)
IRONCORE LINEAR BRUSHLESS DC MOTOR WITH REDUCED DETENT FORCE
Title (de)
LINEAR-GLEICHSTROMMOTOR MIT EISENKERN UND REDUZIERTER REDUKTANZKRAFT
Title (fr)
MOTEUR LINEAIRE SANS BALAI A COURANT CONTINU ET A NOYAU DE FER PRESENTANT UNE FORCE DE DETENTE REDUITE
Publication
Application
Priority
- US 2004017582 W 20040602
- US 47674103 P 20030606
Abstract (en)
[origin: WO2004112224A1] A linear brushless DC motor is disclosed which provides reduced detent force by way of a stack (150) that features end teeth (152, 154) that are formed to be wedge shaped, and which has a length in the direction of motion which is approximately equal to (NP + 1/2) x pole pitch, where Np equals the number of poles covered by the armature of the brushless DC motor, and the pole pitch equals a distance between centers of two adjacent magnets (164) of opposite polarity in a field assembly (162) of the linear brushless DC motor.
IPC 1-7
IPC 8 full level
H02K 41/03 (2006.01)
CPC (source: EP KR)
H02K 41/02 (2013.01 - KR); H02K 41/031 (2013.01 - EP); H02K 41/035 (2013.01 - KR); H02K 1/16 (2013.01 - EP); H02K 1/18 (2013.01 - EP); H02K 3/487 (2013.01 - EP); H02K 2213/03 (2013.01 - EP)
Citation (search report)
See references of WO 2004112224A1
Citation (examination)
ES 2177428 A1 20021201 - INST CIENTIFICO TECNOL NAVARRA [ES]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004112224 A1 20041223; CN 1799180 A 20060705; EP 1634362 A1 20060315; JP 2006527576 A 20061130; KR 20060022260 A 20060309
DOCDB simple family (application)
US 2004017582 W 20040602; CN 200480015476 A 20040602; EP 04754235 A 20040602; JP 2006515155 A 20040602; KR 20057023406 A 20051206