George Russell Lang

US Patent:

61449245, Nov 7, 2000

Filed:

May 20, 1996

Appl. No.:

8/650228

Inventors:

Martin Joseph Dowling - Norristown PA
George Fox Lang - Lansdale PA
Binish Praful Desai - Norristown PA
Louis Ricciuti - Darby PA

Assignee:

Crane Nuclear, Inc. - Kennesaw GA

International Classification:

G01R 2100
G06F 1900

US Classification:

702 60

Abstract:

A motor performance analyzer senses currents and voltages applied to the motor, converts the sensed signals to digital data signals, and stores the digital data signals. The analyzer includes a processor for evaluating the digital data and a display for alerting a user or technician to potential motor problems, or to developing problems, including winding faults and broken rotor bars. Advanced signal processing techniques are used to further evaluate stored data and to provide trending information.

US Patent:

62369474, May 22, 2001

Filed:

Jun 6, 2000

Appl. No.:

9/588811

Inventors:

Martin Joseph Dowling - Norristown PA
George Fox Lang - Lansdale PA
Binish Praful Desai - Norristown PA
Louis Ricciuti - Darby PA

Assignee:

Crane Nuclear, Inc. - Kennesaw GA

International Classification:

G01R 2100
G06F 1900

US Classification:

702 38

Abstract:

A motor performance analyzer senses currents and voltages applied to the motor, converts the sensed signals to digital data signals, and stores the digital data signals. The analyzer includes a processor for evaluating and comparing the digital data signals to predetermined values for voltage and current of the motor to determine and check for the correct placement of the current and voltage probes along corresponding phases of the motor. The analyzer also includes [and] a display for alerting a user or technician to potential motor problems, or to developing problems, including winding faults and broken rotor bars. [Advanced signal processing techniques are used to further evaluate stored data and to provide trending information. ].

US Patent:

63081407, Oct 23, 2001

Filed:

Jun 6, 2000

Appl. No.:

9/587827

Inventors:

Martin Joseph Dowling - Norristown PA
George Fox Lang - Lansdale PA
Binish Praful Desai - Norristown PA
Louis Ricciuti - Darby PA

Assignee:

Crane Nuclear, Inc. - Kennesaw GA

International Classification:

G06F 1900

US Classification:

702 60

Abstract:

A method of detecting broken rotor bars including sensing currents applied to the motor, converting the senses signals to digital data signals, and storing the digital data signals. A processor evaluates the digital data to provide a current signal spectrum at various selected sidebands. Sideband peaks having an amplitude within a predetermined value are identified, indicating potential motor problems or developing problems, including winding faults and broken rotor bars. Advanced signal processing techniques are used to further evaluate stored data and to provide trending information.