‍Inverter control method and system [invention]‍

A system and control method for automatically switching between a master and a slave 

Method and system for handling door closing of elevator door machine system [invention]

An advanced door control system of door machine, to avoid pinching people and ensure safety.

Elevator group control method and system [invention]

An advanced elevator group control system, to make the elevator operate efficiently.

Elevator control device [utility model]

It relates to an elevator control device for detecting a door lock signal.