Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1989-03-07
1990-12-25
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318 52, 318809, H02P 528
Patent
active
049806297
ABSTRACT:
An AC-excited generator/motor apparatus comprising; an AC-excited generator/motor having an armature mounting thereon; an armature winding connected to an AC power system and a rotor mounting thereon; and an exciting winding excited by an AC current. An exciting device for supplying a controlled AC exciting current to the exciting winding comprises; a device for calculating a real slip frequency based on a difference between the phase of an armature voltage appearing on the armature winding and the rotational phase of the rotor; and a device for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range of slip frequencies.
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Bando Akira
Kayukawa Shigehiro
Momiyama Akira
Nagura Osamu
Nakagawa Hiroto
Hitachi , Ltd.
Martin David
Shoop Jr. William M.
The Kansai Electric Power Co. Inc.
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