US PATENT SUBCLASS 322 / 86
.~.~ Plural sources of excitation voltage

Current as of: June, 1999
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322 /   HD   ELECTRICITY: SINGLE GENERATOR SYSTEMS

44  DF  GENERATOR CONTROL {11}
59  DF  .~ With excitation winding and/or circuit control {11}
86.~.~ Plural sources of excitation voltage {2}
87  DF  .~.~.~> Dynamoelectric source
88  DF  .~.~.~> Battery source

DEFINITION

Classification: 322/86

(under subclass 59) Subject matter wherein the generator excitation circuit is energized from two or more sources of electric energy and the excitation current depends on the resultant of the two or more voltages impressed thereby.

(1) Note. Usually one of the sources of electric energy is the generator output to which is added or from which is subtracted the auxiliary electromotive force. Usually both sources of electric energy are used in the normal operation of the generator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60, for generator systems under subclass 59 having a substitute or auxiliary source of electric energy to energize the excitation circuit during the starting period, the supply from the substitute or auxiliary source being discontinued after the generator has "built up" to a predetermined voltage.

SEE OR SEARCH CLASS

307, Electrical Transmissions or Interconnection Systems, 43+, for electrical systems in which a single load is supplied by a plurality of sources or supply circuits for electrical energy.

318, Electricity: Motive Power Systems, and

530, for motor control by field circuit having plural sources of field circuit voltage.

320, Electricity: Battery or Capacitor Charging or Discharging, appropriate subclasses, particularly

123, for a battery or capacitor charging or discharging system including a generator.