The diodes 28 and 30 are forward biased so that {HEAD ~ induced voltage} produces {TAIL ~ a current flow} from terminal 22 through diode 28 through inductor LF, load RL through diode 30 to terminal 20 
produces
The diodes 28 and 30 are forward biased so that { HEAD ~ induced voltage } produces { TAIL ~ a current flow } from terminal 22 through diode 28 through inductor LF , load RL through diode 30 to terminal 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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