Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Patent
1997-04-07
1999-05-18
Shoop, Jr., William M.
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
318700, 318715, H02P1/46
Patent
active
059053550
ABSTRACT:
A pump-motor apparatus comprising: a pump having an input shaft for receiving motive force to operate the pump, wherein during rotation of the input shaft, the pump exhibits repeating cyclical first torque variations on the input shaft, said first torque variations including cyclical torque peaks and torque dips and occurring in substantially evenly spaced increments in angular position of the input shaft; and an electric drive motor having an output shaft coupled to and driving the input shaft, wherein the electric drive motor exhibits on the output shaft repeating cyclical second torque variations, said second torque variations including cyclical torque peaks and torque dips and occurring in substantially evenly spaced increments in angular position of the output shaft, wherein the substantially evenly spaced increments in angular position of the output shaft are equal to the substantially evenly spaced angular increments in position of the input shaft, wherein torque peaks and dips of the output shaft second torque variations are aligned with the torque peaks and dips of the input shaft first torque variations.
REFERENCES:
patent: 4758132 (1988-07-01), Hartwig
patent: 5180960 (1993-01-01), Austermann
patent: 5296793 (1994-03-01), Lang
patent: 5355069 (1994-10-01), Bahn
patent: 5522653 (1996-06-01), Fulks et al.
patent: 5545964 (1996-08-01), Stephenson
Dimatteo Michael Anthony
Fulks Gary Chris
Kruckemeyer William Charles
General Motors Corporation
Leykin Rita
Shoop Jr. William M.
Simon Anthony L.
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