DONALD S KIMMEL
Engineers in Fletcher, NC
License number
Pennsylvania PE020209E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Fletcher, NC 28732
Pennsylvania
Pennsylvania
Personal information
See more information about DONALD S KIMMEL at radaris.comName
Address
Phone
4 Sky Ridge Rd, Landenberg, PA 19350
718 Oak St, Johnstown, PA 15902
805 Mount Aetna Blvd, Connellsville, PA 15425
1319 Oakridge Rd, Mc Donald, PA 15057
18 Sunset Ave, Leola, PA 17540
Professional information
Thermal Protection Apparatus For A Synchronous Machine
US Patent:
5305234, Apr 19, 1994
Filed:
Dec 31, 1991
Appl. No.:
7/815678
Inventors:
David R. Markus - Monroeville PA
Kenneth M. Eichler - Murrysville PA
Donald S. Kimmel - Fletcher NC
Gerhard K. Kasprowicz - Ancaster, CA
Robert S. Murray - Caledonia, CA
Kenneth M. Eichler - Murrysville PA
Donald S. Kimmel - Fletcher NC
Gerhard K. Kasprowicz - Ancaster, CA
Robert S. Murray - Caledonia, CA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
H02H 706
US Classification:
364550
Abstract:
A synchronous machine is protected from closely spaced instances of excessive field current and an excessive volts/hertz ratio by a control system which models rotor and stator cooling to provide memory of recent periods of excessive heating. Maximum excitation limiting and volts/hertz ratio limiting modules in a microprocessor based automatic voltage regulator for the machine generate time delayed limit signals which override voltage feedback control when the respective parameters exceed threshold values. The limiters each increment a count when the associated threshold value is exceeded and generate the associated limit signal when a predetermined count is reached. The predetermined counts and the counting rates are selected such that the delay intervals are inversely proportional to the amount by which the threshold values are exceeded. The counts are decremented at a rate which models rotor and stator cooling when the respective parameters return below the threshold values. If another event occurs before the count reaches zero, the delay before limiting action is reinitiated is shortened by an amount related to the residual heating.
Apparatus Protecting A Synchronous Machine From Under Excitation
US Patent:
5264778, Nov 23, 1993
Filed:
Dec 31, 1991
Appl. No.:
7/815676
Inventors:
Donald S. Kimmel - Fletcher NC
Charles R. Mummert - Hendersonville both of NC
Kenneth M. Eichler - Murrysville PA
David R. Markus - Monroeville PA
Charles R. Mummert - Hendersonville both of NC
Kenneth M. Eichler - Murrysville PA
David R. Markus - Monroeville PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
H02P 914
US Classification:
322 25
Abstract:
Apparatus for protecting a synchronous generator from under-excitation, includes a limiter implemented as part of a microprocessor based voltage regulator. The limiter selectively characterizes one or more limiting parameters, such as, system stability, machine capability and loss of field protection, as straight line segments in the real/reactive power plane to provide versatile, easily modified limits on excitation.