General Electric Company

Ravikumar Sandrana

Sudhanshu Rai

Nicola Piccirillo

Subrat Kumar Sahoo

A system and method for diagnosis and prognosis of thermal sensitivity in a rotor of an electrical machine. A first system is provided for evaluating thermal sensitivity in a rotor of an electrical machine and includes: an input system for obtaining vibration data and field current from the rotor and for obtaining a set of operating parameter; a system for calculating a relationship between vibration and field current; an evaluation system for determining whether the relationship is significant; and a system for issuing a notification of thermal sensitivity in response to a determination of a significant relationship. A second system includes a system for calculating a series of relationships between vibration and field current over a period of time; an evaluation system for determining whether a change in the series of relationships over the period of time is significant; and a system for issuing a notification of thermal sensitivity in response to a determination of a significant change in the series of relationships.

Diagnosis and prognosis of rotor thermal sensitivity

A coolant flow reduction monitoring system for a rotary electric machine having stator coils within a plurality of slots of a stator thereof is provided. The stator coils are cooled by a coolant flowing in a plurality of passages provided in the stator coils. The system includes an outlet temperature sensor for measuring a coolant outlet temperature of the coolant in an outlet of at least one of the plurality of passages, a slot temperature sensor for measuring a temperature in at least one slot at a location along a length of each slot and outside of the stator coils, and an inlet temperature sensor for measuring a coolant inlet temperature of the coolant. A coolant flow reduction monitor generates an alarm indicating a coolant flow reduction based on the at least one coolant outlet temperature, the at least one slot temperature and the coolant inlet temperature.

Growing community of inventors

Bengaluru, India

Ravikumar Sandrana