Aufzug

Details

Veröffentlichungs-Nr.

EP3722239

Aktenzeichen

EP19168226

Anmeldetag

9. April 2019

Veröffentlichung

1. September 2021

Erteilung

1. September 2021

Rechtsraum

EP

IPC

B66B5/02

Abstract

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 isolation relay (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).According to the invention- a second and/or third (38b,c) of said feed lines (38a-c) is via a second switch (54a,b) connectable as power supply to a car door arrangement (56),- the first switch (52) as well as the second switch (54a,b) are controlled by the emergency control (34), and- the emergency control (34) is connected to a manual drive circuit (78) having a manual drive switch (82) for a manual rescue drive.Further the elevator comprises:- a first feedback circuit (41) configured to provide to the emergency control (34) first information indicating the switching state of the isolation relay (40),- a second feedback circuit (47) which is configured to provide to the emergency control (34) second information indicating switching state of the first switch (52). The emergency control (34) is configured to selectively allow or prevent the emergency drive operation on the basis of the first information and the second information.

Anmelder

Firma

KONE Corporation

Land

🇫🇮 Finnland

Fachgebiete