Enhanced deceleration propulsion system for elevators

Patent metadata

Field	Value
Publication number	US-11661306-B2
Application number	US-201816108901-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Jan 17, 2013
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

An elevator system includes an elevator car; a guide rail; and a linear synchronous reluctance motor including: a primary circuit having a plurality of primary poles and windings about the primary poles; a secondary circuit having a plurality of secondary poles; the primary circuit coupled to one of the elevator car and the guide rail, the secondary circuit coupled to the other of the elevator car and the guide rail.

First claim

What is claimed is:

1. An elevator system comprising:
an elevator car;
a guide rail; and
a linear synchronous reluctance motor including:
a primary circuit having a plurality of primary poles and windings about the primary poles;
a secondary circuit having a plurality of secondary poles;
the primary circuit coupled to one of the elevator car and the guide rail, the secondary circuit coupled to the other of the elevator car and the guide rail.

2. The elevator system of claim 1 wherein:
the primary circuit is mounted to the elevator car.

3. The elevator system of claim 1 wherein:
a pitch of the primary poles matches a pitch of the secondary poles.

4. The elevator system of claim 1 wherein:
the secondary poles are formed in the guide rail.

5. The elevator system of claim 4 wherein:
the primary poles include a first primary pole positioned on a first side of the guide rail and a second primary pole positioned on a second side of the guide rail.

6. The elevator system of claim 4 wherein:
the guide rail includes guide surfaces for guiding the elevator car along a hoistway.

Assignees

• Otis Elevator Co

Inventors

• Fargo Richard N

Classifications

• B66B1/285 Primary

  with the use of a speed pattern generator · CPC title

• B66B11/0407

  actuated by an electrical linear motor (in the counterweight B66B17/12) · CPC title

• Y02B50/00

  Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies · CPC title

• B66B5/22

  by means of linearly-movable wedges (B66B5/24 takes precedence) · CPC title

• B66B5/02

  responsive to abnormal operating conditions · CPC title