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公开(公告)号：US20240393136A1
公开(公告)日：2024-11-28
申请号：US18796910
申请日：2024-08-07
Applicant: ABB Schweiz AG
Inventor： Richard Roberts , Werner Hösl
Abstract: A resolver comprises a pair of stator windings and a rotor winding that is rotatable with respect to the stator windings and inductively coupled to these. A method for monitoring the resolver comprises exciting the rotor winding with an alternating current having an oscillation frequency and a first phase, obtaining voltages induced in the stator windings by the alternating current flowing in the rotor winding, deciding that the resolver is defective when a shift between phases of a first one of said induced voltages and of the alternating current differs from a nominal phase shift by more than a predetermined phase threshold.
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公开(公告)号：US20240401983A1
公开(公告)日：2024-12-05
申请号：US18798228
申请日：2024-08-08
Applicant: ABB Schweiz AG
Inventor： Richard Roberts , Werner Hösl
Abstract: A method for operating a resolver, the resolver comprising at least one stator winding and at least one rotor winding which is rotatable with respect to said at least one stator winding and inductively coupled thereto, a monitoring phase of the method comprising: a) exciting the rotor winding with an alternating current, b) deriving a first sampling voltage value by sampling a voltage induced in the at least one stator winding by the alternating current flowing in the rotor winding at a predetermined first phase of the excitation current, and c) deciding that the resolver is defective when the first sampling voltage value deviates significantly from a DC component of the induced voltage.
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公开(公告)号：US20240391098A1
公开(公告)日：2024-11-28
申请号：US18796971
申请日：2024-08-07
Applicant: ABB Schweiz AG
Inventor： Richard Roberts , Werner Hösl
Abstract: A method for monitoring a resolver having first and second winding assemblies, the first winding assembly having a sine winding and a cosine winding arranged so that when inductive coupling between the sine winding and the second winding assembly is zero, inductive coupling between the cosine winding and the second winding assembly is at a maximum, and when inductive coupling between the cosine winding and the second winding assembly is zero, inductive coupling between the sine winding and the second winding assembly is at a maximum, the method including obtaining a master amount of total inductive coupling between the first and second winding assemblies of the resolver; obtaining a current amount of total inductive coupling at a current instant in time; and deciding that the resolver is defective when a difference between the current amount and the master amount exceeds a predetermined threshold.
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