Insulation defect detection of high voltage generator stator core

US9658192B2 · kind B2 · utility

Assignees

• Siemens Aktiengesellschaft · DE
• SIEMENS ENERGY, INC. · US

Inventors

• Xuefei Guan · Princeton, US
• Jingdan Zhang · Plainsboro, US
• Shaohua Kevin Zhou · Plainsboro, US
• Mark W. Fischer · Pittsburgh, US
• Waheed A. Abbasi · Murrysville, US
• Scott A. Karstetter · Monroeville, US
• Christopher Adams · Hoboken, US

Key dates

• Filing date: Jan 16, 2013
• Grant date: May 23, 2017
• Expiry date: Mar 21, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/1227
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.