Measuring and testing – Dynamometers – Responsive to torque
Patent
1987-12-22
1989-12-26
Orsino, Joseph A.
Measuring and testing
Dynamometers
Responsive to torque
73168, 7386233, 324158MG, 318490, G01M 1900
Patent
active
048889962
ABSTRACT:
A method and apparatus for remotely monitoring the condition of a DC motor operated valve and/or valve operator by monitoring at a remote location, such as the Motor Control Center ("MCC"), the output torque of the DC motor which drives the valve operator comprises method and apparatus for monitoring the armature circuit of the DC motor at the remote location (I.E. MCC) to acquire a value of motor armature current (Ia), voltage drop across the armature (Va), and the electrical resistance of the armature (Ra); these remotely acquired electrical values of Va, Ia and Ra being utilized as input to apparatus for generating mechanical values of motor output mechanical power, armature speed, and a motor torque factor representative of the motor output torque multiplied by a constant; and the apparatus of the present invention also comprises invention circuitry for isolating the armature resistance (Ra) as a resistance value, representing that resistance value as a voltage and inputting that voltage representation of Ra into other modules of the circuitry to be used in the final generation of the DC motor torque factor; this Torque Factor being used in accordance with the present invention either: (1) alone, as a single indicator of the stem load on the valve stem of the valve operator (i.e.: by multiplying the torque factor by the known constant and also by the manufacturers' published gear efficiency values for the specific valve operator being monitored); or (2) in conjunction with other diagnostic equipment as an assist in determining the condition of the valve and/or valve operator.
REFERENCES:
patent: 3019640 (1962-02-01), Engelmann
patent: 3137163 (1964-06-01), Engelmann
patent: 4029122 (1977-06-01), Jaegtnes
patent: 4123009 (1978-10-01), Kilpinen
patent: 4321529 (1982-03-01), Simmonds et al.
patent: 4333118 (1982-06-01), Comstedt et al.
patent: 4416160 (1983-11-01), Sugimoto
patent: 4542649 (1985-09-01), Charbonneau et al.
patent: 4570903 (1986-02-01), Crass
patent: 4744041 (1988-05-01), Strunk et al.
patent: 4787245 (1988-11-01), Anderson et al.
"Rotating Electric Machinery and Transformer Technology", 2nd Edition, Donald V. Richardson, Reston Pub. Co. Inc., 1982, pp. 130-132, 140-144, 178-180.
Square D-Class 8430 Type G Load Converter Relays-Instruction Sheet 63080-003-01 Nov. 1983.
Square D-Product Data-Bulletin M-629 Load Monitoring For Three Phase Induction Motors-Apr., 1984.
Square D-Product News-Control Products-Load Detector And Load Converter Relays type V and G-IC-277 Class 8430 Nov. 1983.
Movats Incorporated Letter Dated Jul. 16, 1986, to Harvey Meieran And Attached 3 page Summary.
Advertisement By Movats Incorporated Entitled "Verifying Motor Operated Valve Operability From Motor Control Center"-Distributed First About Jul., 1986.
Rak Thomas A.
Whitaker T. Mark
Chen Hollis T.
Isaf Louis T.
Movats Incorporated
Orsino Joseph A.
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