(under subclass 174) Subject matter wherein the dynamoelectric machine is of the motor generator type.
(1) Note. In this arrangement the input frequency is supplied to the motor and the output frequency is taken from the generator.
(2) Note. Although systems involving motor-generator sets are generally classified in Class 322, Electricity: Single Generator Systems, systems involving significant frequency conversion are classified in this class (363). However, the generic place for systems involving motor-generator sets is in Class 322. See the class definition, Lines With Other Classes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
102, for current conversion systems which have a motor-generator converter.
150, for phase conversion systems which have a motor-generator converter.
SEE OR SEARCH CLASS 322, Electricity: Single Generator Systems,
16, for miscellaneous motor-generator set systems having simultaneous control of both motor and generator; subclasses 17+ for motor- generator set systems having automatic control of either the motor or generator; subclass 39 for motor-generator systems having motor control.
323, Electricity: Power Supply or Regulation Systems,
202, for current or voltage magnitude control systems involving balances sets (which are motor-generator sets).
