The three phase alternating {HEAD ~ current circuit configuration} 2, wherein said {TAIL ~ pulse generator} includes an optical coupler that electrically isolates said control voltage from said pulse generator 
wherein
The three phase alternating { HEAD ~ current circuit configuration } 2 , wherein said { TAIL ~ pulse generator } includes an optical coupler that electrically isolates said control voltage from said pulse generator
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH