Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1993-05-12
1995-07-04
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318139, H02P 146
Patent
active
054303621
ABSTRACT:
A control for operating an electromagnetic machine in a starting mode of operation wherein the main armature winding of the machine receives electrical power from a controllable power source during the starting mode of operation, comprises a circuit for detecting a magnitude of a parameter of power applied to the main armature winding relative to a stationary frame of reference, a position sensor for detecting rotor position of the electromagnetic machine, a converter responsive to angular position indication for converting the detected parameter magnitude into field and torque producing components relative to a rotating frame of reference, and a circuit responsive to the field and torque producing components for controlling the power source during operation in the starting mode. This control includes an igniter for igniting a prime mover. Further, the control is operable during a first phase prior to ignition of the prime mover for causing the electromagnetic machine to provide motive power to the prime mover so as to accelerate the prime mover at a first predetermined rate, is operable during a second phase subsequent to the first phase so as to accelerate the prime mover at a second predetermined rate, is operable during this second phase for providing fuel to the prime mover to facilitate ignition thereof, and is operable during a third phase subsequent to the ignition of the prime mover so as to accelerate the prime mover at a third predetermined rate to a self-sustaining speed.
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Carr Kenneth R.
Cook Alexander
Hanson Michael J.
Maddali Vijay K.
Markunas Albert L.
Makeever Jeffery J.
Shoop Jr. William M.
Sircus Brian
Sundstrand Corporation
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