US PATENT SUBCLASS 318 / 533
.~ Impedance-controlled
Current as of:
June, 1999
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318 /
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ELECTRICITY: MOTIVE POWER SYSTEMS
521
DF
FIELD OR SECONDARY CIRCUIT CONTROL
{6}
533
.~ Impedance-controlled {1}
534
DF
.~.~
> Plural, diverse or diversely connected or controlled field circuit impedances {1}
DEFINITION
Classification: 318/533
(under subclass 521) Subject matter in which impedance devices are provided in the field circuit of a motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
249, for series motor systems having impedance devices either in series or in parallel to the series field winding.
532, and the subclasses specified in the Notes thereto, for field control by means of space-discharge devices.
700, for this subject matter in synchronous motor systems.
821, for induction motor systems having impedance devices in the secondary circuit thereof.
SEE OR SEARCH CLASS
322, Electricity: Single Generator Systems,
75, for generation systems having impedance devices in the field circuit of the generator.
323, Electricity: Power Supply or Regulation Systems,
364, for miscellaneous circuit control by means of impedances.
