Linear induction motor door drive assembly for elevators

摘要

The door or doors of an elevator are driven through their opening and closing cycles by one or more linear induction motor (LIM) assemblies in which the primary winding component of the LIM assembly is secured to the elevator cab structure and the LIM secondary component is secured to the cab door. If the cab has two oppositely moving doors, there will preferably be two separate motor drives, one for each door. In one embodiment, the motor components are arranged so as to create a normal force which is horizontal; and in another embodiment, the normal force created is vertical. A primary motor mount bracket is used which secures the primary winding component to the overhead component of the cab structure.