公开(公告)号：WO2023280376A1

公开(公告)日：2023-01-12

申请号：PCT/EP2021/068476

申请日：2021-07-05

Applicant: KONE CORPORATION

Inventor： KAUPPINEN, Tuukka ,  PAAKKINEN, Mikko ,  JOKINEN, Risto ,  KAIPIA, Perttu

IPC: B66B1/30

Abstract: The invention relates to an elevator drive unit (200) for managing a regenerative power of an elevator system (100). The elevator drive unit (200) comprises: first terminals (220a) for connecting the elevator drive unit (200) to the mains (230); second terminals (220b) for connecting the elevator drive unit (200) to an elevator hoisting motor (210); a frequency converter (240) for enabling a bidirectional transfer of power between the mains (230) and the elevator hoisting motor (210); and a control unit (250). The control unit is configured to: obtain an indication representing a detection of a special operational situation of the elevator system (100), introduce a non-zero power limit specific to the detected special operational situation of the elevator system (100), and control the frequency converter (240) to limit supply of the regenerative power from the elevator hoisting motor (210) to the mains (230) to the power limit. The invention relates also to an elevator system (100) and a method for managing a regenerative power of an elevator system (100).