Elevator car door system

摘要

An elevator car door operating system includes a positioning and synchronization system (30) for ensuring simultaneous opening and closing of elevator car doors (12,14), a stationary motor secondary (22), a pair of moving motor primaries (24) driving the respective doors, and a single motor drive (78) for driving both motor primaries. The motor drive generates proper current and frequency to supply to both motor primaries. Since movement of both elevator car doors is synchronized and therefore requires substantially identical force at a given time, a single motor drive can be used to generate current for driving both doors.