Condition monitoring of mechanical drive train coupled with electrical machines

US9109517B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Arijit Banerjee · Bengaluru, IN
• Rupam Mukherjee · Bengaluru, IN
• Arvind Kumar Tiwari · Bengaluru, IN
• Somakumar Ramachandrapanicker · Bengaluru, IN
• Srilatha Boyanapally · Bengaluru, IN
• Paul Lloyd Flynn · Lawrence Park, US
• Ajith Kuttannair Kumar · Erie, US

Key dates

• Filing date: Mar 14, 2011
• Grant date: Aug 18, 2015
• Expiry date: Jun 29, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P29/0241
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of monitoring health of a mechanical drive train is provided. The method includes obtaining voltage and current signals from at least one phase of an electrical machine coupled with the mechanical drive train. The method also includes representing the electrical machine having a non-sinusoidal flux distribution as a combination of a plurality of harmonic order sinusoidally distributed virtual electrical machines based on the obtained voltage and current signals. The method further includes determining a torque profile associated with one or more combinations of the sinusoidally distributed virtual electrical machines. Finally, the method includes detecting the presence of an anomaly in the mechanical drive train based on the torque profile or spectrum.