Electric linear motor

Patent metadata

Field	Value
Publication number	US-10858219-B2
Application number	US-201715838018-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Jun 26, 2015
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

The invention refers to an electric linear motor comprising at least one linear stator designed to be located in a fixed correlation to an environment, particularly building, and at least one mover designed for connection with an element to be moved and co-acting with the stator, which motor comprises a stator beam supporting said at least one stator, which stator beam has at least one side face carrying ferromagnetic poles of said stator spaced apart by a pitch, and which mover comprises at least one counter-face facing said side face(s) of the stator beam, in which counter-face electro-magnetic components of the mover are located.

First claim

The invention claimed is:

1. Electric linear motor comprising:
at least one linear stator designed to be located in a fixed correlation to an environment
a stator beam supporting the at least one stator and having four side faces, wherein at least one side face carries ferromagnetic poles of the at least one stator spaced apart by a pitch (d); and
at least one mover designed for connection with an element to be moved and co-acting to move along the stator, the mover comprises:
at least one counter-face facing the side face(s) of the stator beam, in which counter-face electro-magnetic components of the mover are arranged to co-act with the ferromagnetic poles of the stator beam,
a C-profile surrounding the stator beam, and
four counter-faces arranged in a rectangular configuration facing the four side faces of the stator beam, wherein each of the counter-faces comprises the electro-magnetic components of the mover and the opening in the C-profile is configured to accommodate a fastening element to fix the stator beam to an elevator shaft.

2. Electric linear motor according to claim 1 , wherein the stator and the mover form guide means for the travel of the element to be moved along the stator beam.

3. Electric linear motor according to claim 2 , wherein the ferromagnetic stator poles of the stator beam and the electro-magnetic components of the mover form a magnetic bearing for the guide and suspension of the element.

4. Electric linear motor according to claim 1 , wherein the mover has separate magnetic bearing coils which are controlled independent of electro-magnetic mover components of the linear motor, which are controlled to regulate the air gap of the linear motor, which separate magnetic bearing coils co-act with the linear stator, with the stator iron.

5. Electric linear motor according to claim 1 , wherein the stator beam comprises a support structure for at least two stators and at least one fastening element to fix the support structure to the environment.

6. Electric linear motor according to claim 1 , wherein the elevator motor is a flux-switching permanent magnet motor (FSPM).

7. Electric linear motor according to claim 1 , wherein the stator beam has at least two side faces with stator poles having the same pitch and wherein the position of the stator poles of both side faces in the length direction of the stator is mutually offset.

8. Electric linear motor according to claim 7 wherein the stator beam has four side faces with stator poles having the same pitch and the pitch of the opposite side faces is identical whereas the pitch of the side faces extending in right angles is offset in length direction of the stator.

9. Electric linear motor according to claim 1 , wherein the stator beam has a polygonal cross section and has several side faces carrying ferromagnetic poles, which side faces are connected via corners.

10. Electric linear motor according to claim 9 , wherein the cross section of the stator beam is rectangular.

11. Electric linear motor according to claim 1 , wherein the mover is configured have one mounting side for a rucksack-suspension of the element.

12. Electric linear motor according to claim 1 , wherein the mover is in a direction perpendicular to the stator beam releasable from the stator beam.

13. Electric linear motor according to claim 1 , wherein a busbar with conductor rails is located along the length of the stator beam, and the mover of the element carried by it has at least one contactor, with contact rollers, connecting the conductor rails.

14. Electric linear motor according to claim 1 , wherein the mover or the element to be moved has a power source, which is configured as back-up power source for the mover.

15. Electric linear motor according to claim 1 , being configured to be installed in a high rise elevator with a vertical length of more than 50 m.

16. Electric linear motor according to claim 1 , wherein at least two parallel stator beams are located in the environment; each of which guiding at least one mover; whereby at least two movers located parallel to each other are configured to be commonly connected to the element to be moved, each of the movers co-acting with one of the stator beams, respectively.

17. Electric linear motor according to claim 1 , wherein the ferromagnetic poles are teeth provided on a side face of a ferromagnetic stator rod, which teeth which are spaced apart by teeth gaps.

18. Electric linear motor according to claim 1 , wherein the stator(s) does not have any permanent magnets and as well as no windings either.

Assignees

• Kone Corp

Inventors

• Petrov Ilya
• Purosto Tero
• Hakala Tero
• Ratia Jouni

Classifications

• B66B11/0407 Primary

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

• B66B9/003

  for lateral transfer of car or frame, e.g. between vertical hoistways or to/from a parking position · CPC title

• B66B7/044

  with magnetic or electromagnetic means · CPC title

• H02K37/00

  Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors · CPC title

• H02K41/02

  Linear motors; Sectional motors · CPC title