EP 1459436 A2 20040922 - METHOD FOR STARTING A BRUSHLESS D.C. MOTOR
Title (en)
METHOD FOR STARTING A BRUSHLESS D.C. MOTOR
Title (de)
VERFAHREN ZUM STARTEN EINES BUERSTENLOSEN GLEICHSTROMMOTORS
Title (fr)
PROCEDE POUR DEMARRER UN MOTEUR COURANT CONTINU SANS BALAIS
Publication
Application
Priority
- DE 0204582 W 20021216
- DE 10162380 A 20011219
Abstract (en)
[origin: WO03052919A2] The invention relates to a method for starting a brushless d.c. motor comprising a multi-phase stator winding. According to the invention, a plurality of current pulses is applied to the stator winding while the rotor is stationary, a current build-up period is measured in the stator winding for each current pulse until a current threshold has been reached and the rotor position is derived from the current build-up periods that have been measured. The aim of the invention is to obtain a controlled acceleration without the use of a sensor and to precisely determine the rotor position without using complex control technology. To achieve this, a plurality of test current pulses is successively applied to the stator winding in such a way that the test current pulses in the stator generate stator flow vectors across 360 DEG , which are electrically offset by identical angular increments. The current build-up period is measured in the aggregate current of the stator winding for each stator flow vector and the phase angle of the stator flow vector with the shortest current build-up period is determined as the rotor position.
IPC 1-7
IPC 8 full level
H02P 6/185 (2016.01); H02P 6/22 (2006.01)
CPC (source: EP US)
H02P 6/185 (2013.01 - EP US); H02P 6/22 (2013.01 - EP US)
Citation (search report)
See references of WO 03052919A2
Citation (examination)
- US 6091222 A 20000718 - VERTEMARA CARLO [US], et al
- US 6100656 A 20000808 - EL-SADI ASHRAF I [US], et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 03052919 A2 20030626; WO 03052919 A3 20031106; DE 10162380 A1 20030703; EP 1459436 A2 20040922; JP 2005513986 A 20050512; JP 4673553 B2 20110420; US 2004113576 A1 20040617; US 6885163 B2 20050426
DOCDB simple family (application)
DE 0204582 W 20021216; DE 10162380 A 20011219; EP 02794997 A 20021216; JP 2003553701 A 20021216; US 47275003 A 20030924