MEASURING METHOD AND DEVICE FOR MEASURING DEFLECTIONS AT STATOR END WINDINGS

• US 20160282173A1
• Filed: 03/23/2016
• Published: 09/29/2016
• Est. Priority Date: 03/25/2015
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (GE Aerospace)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: AREND, Peter Ullrich
• Granted Patent: US 10,591,349 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence

Abstract

The present disclosure relates to a method, a device, and a computer program for measuring deflections at the stator end winding of an electric machine. Disclosed is a measurement method, a device, and a computer program for measuring vibrations at the stator end winding of an electric machine, with the steps of arranging sensors at the stator end winding at different positions, measuring the vibrations with the sensors, measuring the amplitudes and phases of the radial and tangential vibrations with the sensors, deriving displacements of the stator end winding due to vibrations by means of the measured amplitudes and/or phases of the radial and tangential vibrations.

Claims

1. A measurement method for measuring vibrations at the stator end winding of an electric machine, with the steps of

arranging sensors at the stator end winding at different positions,

measuring the vibrations with the sensors,

measuring the amplitudes and phases of the radial and tangential vibrations with the sensors,

deriving displacements of the stator end winding due to vibrations by means of the measured amplitudes and/or phases of the radial and tangential vibrations.

2. The measurement method according to claim 1, wherein the derived displacements are assigned to an operation deflection shape of the stator end winding.

3. The measurement method according to claim 1, wherein the sensors for measuring the vibrations are arranged at the stator end winding at equidistant positions.

4. The measurement method according to claim 2, wherein the assigned operation deflection shape is a four-node operation deflection shape in which the deflection shape is defined by the deflection of four nodes at the stator ending winding.

8. A computer program stored on a calculation unit for processing the measurement method according to claim 1.

5. A measurement device for measuring vibrations at the stator end winding of an electric machine. The device comprising:

three sensors arranged at different positions of the stator end winding measuring the amplitudes and phases of the radial and tangential vibrations, and

a calculation unit for deriving displacements of the stator end winding due to vibrations by means of the measured amplitudes and/or phases of the radial and tangential vibrations.

6. The measurement device for measuring vibrations at the stator end winding according to claim 5, wherein the calculation unit assigns the displacements to an operation deflection shape of the stator end winding.

7. A measurement device for measuring vibrations at the stator end winding according to claim 6, wherein the calculation unit derives the operation deflection shapes of the stator end winding on basis of 2-node shapes and/or 4-node shapes.