... s nui cho cc vi mch v lm ngun in p ngng 14 S d phi cỳ ngun -24V l cng sut ca cc vi mch hn ch, nu s dng cho mch khuych i xung i hi cng sut ln th cc vi mch n p s b qu nhit Do ỳ ngun nui cho mch ... Ehb=Kb=Ed=-Um Ihb= 220 Ehbd Udm = = 0,795 + Rh Ru + Rh Ru + Rh 23 V mt k thut m bo an ton cho ng c th chn Rh nm vng cho php Ihb=(2ữ2,5Im) chn Ihb=2,2Im=2,2.25,4=55,88(A) Rh= 220 -0,795=3,142( Ih Tnh ... ng b cng t lun cc cun dừy to in p ngun nui cho mch iu khin Ta bit cng sut mi BAX l W , cỳ BAX s dng cng sut ca ngun nui ; ng thi cng tnh dn cng sut nui cho cc khc nh khuych i , so snh , phn hi...