(under subclass 126) Subject matter in which the control means comprises one or more impedance devices in series and/or in shunt to the motor windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
132, for this subject matter where the impedance device is a space-discharge or unidirectionally conductive device.
508+, and subclasses specified in the search notes appended thereto, for other motor control systems wherein impedance devices are employed in the energizing circuit of an electric motor.
SEE OR SEARCH CLASS
323, Electricity: Power Supply or Regulation Systems,
