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