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US 5,962,948 AGranted
Elevator motor with flat construction
AssigneeKone Corporation
InventorsHarri Hakala, Esko Aulanko, Jorma Mustalahti
Life of this patent
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Abstract
An elevator motor (2) employing permanent magnets (30) attached in a circle on the surface (36) of the rotor disc (12). The rotor disc (12) forms part of both the magnetic circuit and the supporting structure of the rotor (13). The permanent magnets (30) are placed in a separate cavity formed in the stator disc and having one side open, said cavity also housing the stator windings (17). The outer cavity wall directed towards the rotor disc (12) is provided with a sealing member to close the cavity.
Claims20
An elevator motor comprising:
- a stator;
- a generally disc-shaped rotor support structure supporting a rotor including a plurality of permanent magnets attached to a first surface thereof and further having a second surface on another side of the rotor support structure, the first and second surfaces of the rotor support structure being substantially normal to a longitudinal axis of the rotor support structure;
- and
- a traction sheave extending outwardly from the second surface of the rotor support structure in a direction perpendicular to the second surface, wherein an airgap formed between the stator and the rotor lies in a plane substantially perpendicular to the longitudinal axis of the rotor support structure.
1 more element
Dependencies are inferred from the claim text.