For instance, when the average voltage of the sampled, filtered DC waveform at node 704 exceeds a given threshold, {HEAD ~ the feedback control} will reduce the average current passing through {TAIL ~ the field coil} 721 which in turn, reduces the torque on the impeller while reducing the average armature voltage 
For instance , when the average voltage of the sampled , filtered DC waveform at node 704 exceeds a given threshold , { HEAD ~ the feedback control } will reduce the average current passing through { TAIL ~ the field coil } 721 which in turn , reduces the torque on the impeller while reducing the average armature voltage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH