Electricity: motive power systems – Induction motor systems – Power-factor control
Reexamination Certificate
2007-12-18
2007-12-18
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Power-factor control
C318S438000
Reexamination Certificate
active
11379965
ABSTRACT:
An AC power controller system applies three-phase AC operating power to an induction motor that drives a non-linear mechanical load. A primary low pass filter is connected in series between branch phase conductors and a power controller of the type that uses gate-controlled switching thyristors for controlling power to the motor. KVAR capacitors connected between the power controller and the induction motor phase windings form a secondary low pass filter across the controller output terminals. The primary and secondary low pass filters isolate the power controller and induction motor with respect to spurious noise and harmonics generated by local as well as remote sources, and also improve real power transfer efficiency from the power generating source to the induction motor by transforming the effective impedance of the power source and the induction motor load.
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Griggs Dennis T.
Power Conservation Ltd
Ro Bentsu
LandOfFree
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