Likewise, when the average voltage of the sampled, filtered DC waveform at node 704 recedes below a given threshold, the feedback control increases the average current passing through the field coil 721, which in turn, increases the torque on the impeller for {HEAD ~ the benefit} of increasing {TAIL ~ the average armature voltage} 
of increasing
Likewise , when the average voltage of the sampled , filtered DC waveform at node 704 recedes below a given threshold , the feedback control increases the average current passing through the field coil 721 , which in turn , increases the torque on the impeller for { HEAD ~ the benefit } of increasing { TAIL ~ 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 OTH OTH OTH 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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL