Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1985-02-26
1986-07-15
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318805, 318814, 323207, H02P 540, H02J 318
Patent
active
046008748
ABSTRACT:
A system for controlling the operation of an alternating current induction motor having windings supplied by electrical power from the polyphase alternating current source includes a load commutated inverter circuit which is connected between the power source and the induction motor for furnishing electrical power to the motor. Controllers responsive to a command signal and a feedback signal indicative of motor operating parameters control the operation of said load commutated inverter circuit. There is further provided a fixed capacitor circuit connected between the windings of the motor for supplying reactive volt amperes (VARs) to said load commutated inverter circuit and said motor. Finally, there is provided a variable VAR generator connected between the motor windings for supplying VARs to said load commutated inverter circuit and said motor in response to the output of a third feedback control path which is also responsive to a command signal and prescribed operating parameter(s) of said load and/or said commutated inverter.
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Iwasaki, et al., "Current-Fed Inverter with Status Var Generator for Induction Motor Drive" Electrical Engineering in Japan--vol. 103, No. 3, 1983.
Sember James W.
Tupper Leland C.
Walker Loren H.
Weiss Herbert W.
General Electric Company
Renner Arnold E.
Smith Jr. David
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