Back to results
US 6,305,501 B1Granted
Elevator reluctance linear motor drive system
AssigneeKone Corporation
InventorsMatti Kähkipuro, Raimo Pelto-Huikko, Antti Kallioniemi
Life of this patent
Estimating the term…
Abstract
A drive system for an elevator includes a drive machine by means of which the for moving and supporting an elevator car. The primary circuit of a linear motor is permanently fitted to a wall of a building while its secondary circuit is fitted in conjunction with the elevator car and moves with the elevator car. Pressurized air is supplied between the primary and secondary circuits of the reluctance-type linear motor to maintain an air gap between them.
Claims12
An elevator comprising an elevator car and a drive machine, the drive machine comprising:
- a linear motor primary circuit permanently fitted to a wall;
- a linear motor secondary circuit fitted in conjunction with the elevator car and moving together with the elevator car, the elevator car being movable and supportable by the drive machine,
- the primary and secondary circuits of the linear motor comprise teeth placed successively in a direction of motion of the elevator, slots being provided between successive teeth and windings of the linear motor being fitted in the slots in both the primary and secondary circuits, magnetic flux induced by the windings completing its loop substantially through two adjacent teeth and a yoke part being provided between the teeth in the primary circuit and in the secondary circuit.
Dependencies are inferred from the claim text.