As shown in FIG 3, the iron core 11 is formed of {HEAD ~ particles} 14 of iron or {TAIL ~ an iron based magnetic material} filled in a casing 13 which is made of an insulating synthetic resin such as phenol and nylon 
of
As shown in FIG 3 , the iron core 11 is formed of { HEAD ~ particles } 14 of iron or { TAIL ~ an iron based magnetic material } filled in a casing 13 which is made of an insulating synthetic resin such as phenol and nylon
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH TAIL TAIL 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