Procedure for adjusting air gaps between rotors and stators in an elevator drive machine
AssigneeKone Corporation
InventorsHarri Hakala, Esko Aulanko, Jorma Mustalahti, Tauno Pajala
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Abstract
The invention relates to a procedure for setting the magnitudes of the axial air gaps and/or the mutual positions of the rotors and stators defining the axial air gaps in a gearless elevator drive machine comprising an electromechanical apparatus having two axial air gaps. In the procedure, the size of the axial air gap and/or the positions of the rotors and stators is/are adjusted based on a selected property, e.g. a current or voltage property.
Claims11
A method of adjusting at least one mechanical property of an elevator drive machine, the elevator drive machine including a traction sheave and an electromechanical apparatus that drives the traction sheave, said method comprising:
- measuring an electrical characteristic of the electromechanical apparatus, the electromechanical apparatus including two motors for driving rotation of the traction sheave, each motor having a stator, a rotor, and an axial air gap between the stator and the rotor, the traction sheave being positioned between and attached to the rotors of the two electric motors along an axis of rotation of the traction sheave;
- and
- adjusting the air gap of at least one of the two motors as a function of the measured electrical characteristic.
Dependencies are inferred from the claim text.