Eric W Jackson

US Patent:

48131156, Mar 21, 1989

Filed:

Nov 23, 1987

Appl. No.:

7/124299

Inventors:

James E. Fletcher - Gonzales LA
Eric C. Jackson - Baton Rouge LA
Michael McAnelly - Baton Rouge LA

Assignee:

Triad Chemical Corporation - Donaldsonville LA

International Classification:

H02K 1514

US Classification:

29596

Abstract:

An apparatus for testing a synchronizing control circuit for any assembly relying upon detecting the relative closeness of one voltage of varying frequency to another voltage of different varying frequency, comprising a test circuit including a first circuit for determining the frequency at which the control circuit operates and a second circuit for determining the operational response of an individual control circuit assembly. A test selection circuit is used to select the desired portion of the test circuit. The apparatus simulates the frequency difference for a frequency comparator circuit of multi generator installations and the operation of a starting synchronous motor, which enables all the components of the comparator control circuit and the components of the synchronous motor exciter control circuit to be checked without actual operation of the prime movers that generate the voltage of varying frequency. Further, the synchronous motor exciter control circuit mounting assembly is made replaceable to facilitate faster and accurate component repairs.

US Patent:

47392568, Apr 19, 1988

Filed:

Aug 2, 1983

Appl. No.:

6/519718

Inventors:

James E. Fletcher - Gonzales LA
Eric C. Jackson - Baton Rouge LA
Michael McAnelly - Baton Rouge LA

Assignee:

Triad Chemical Corporation - Donaldsonville LA

International Classification:

G01R 3102

US Classification:

324158MG

Abstract:

An apparatus for testing a synchronizing control circuit for any assembly relying upon detecting the relative closeness of one voltage of varying frequency to another voltage of different varying frequency, comprising a test circuit including a first circuit for determining the frequency at which the control circuit operates and a second circuit for determining the operational response of an individual control circuit assembly. A test selection circuit is used to select the desired portion of the test circuit. The apparatus simulates the frequency difference for a frequency comparator circuit of multi generator installations and the operation of a starting synchronous motor, which enables all the components of the comparator control circuit and the components of the synchronous motor exciter control circuit to be checked without actual operation of the prime movers that generate the voltage of varying frequency. Further, the synchronous motor exciter control circuit mounting assembly is made replaceable to facilitate faster and accurate component repairs.