OPERATION DE SAUVETAGE AUTOMATIQUE ET MANUEL D'ASCENSEUR

摘要

The invention relates to an elevator comprising- an elevator motor (12)- a motor drive (14) for the elevator motor (12) having a frequency converter comprising a rectifier bridge (16), an inverter bridge (18) and a DC link (20) in between, which frequency converter is controlled via a controller (34), the rectifier bridge (16) being connected to AC mains (42) via three feed lines (38a-c) comprising chokes (44a,b), and the rectifier bridge (16) being realised via controllable semiconductor switches (17a-f),- a contactor (40) being located between the feed lines (38a-c) and AC mains (42),- a backup power supply (48) at least for emergency drive operation,- an emergency control (34) for performing an automatic emergency drive,- the backup power supply (48) is via a first switch (52) connectable with only a first (38a) of said feed lines (38a-c).