.~ Having electrical synchronizing interconnections {3}
42
.~.~ Between windings on auxiliary dynamo-electric machines
DEFINITION
Classification: 318/42
(under subclass 41) Subject matter in which an auxiliary dynamo-electric machine is connected to the rotors of each of two or more electric motors, and the synchronizing interconnections are connected between the windings on the auxiliary dynamo-electric machines.
(1) Note. These dynamo-electric machines normally operate as generators when the motors are operated at a predetermined speed and/or phase relationship and develop voltages that are
substantially equal and in opposition to each other. When, the predetermined speed and/or phase relationships do not exist the magnitude or the phase of the opposing voltages is such as to cause one of the dynamo-electric machines to supply electric energy to the other, the delivering dynamo-electric machine thereby tending to load and hence reduce the speed of the motor to which it is connected and the receiving dynamo-electric machine tending to aid the electric motor to which it is connected and, hence, to tend to increase the speed thereof whereby the two motors are subjected to forces tending to restore the predetermined speed and/or phase relationship therebetween.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71, for two or more motors each driving a tachometer generator the armature circuits of which are connected in series opposition with each other and also in series with some electric current responsive device to detect current flow in the circuits of the interconnected generators and as a result initiate changes in the relative speeds of the motors.
SEE OR SEARCH CLASS
307, Electrical Transmission of Interconnection Systems, 32, for electrical systems in which two or more load circuits have control means for proportioning or dividing the total load therebetween; subclass 84 for parallel generators which supply energy to a useful load.
