At the moment 0 = 0, let the e.m.f. e = E cos (0 - 00) beTransients, Oscillation, And Damping
Why This Family Matters
Section titled “Why This Family Matters”Routes time-domain formulas that separate permanent terms from natural or temporary terms.
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Candidate Formula Cards
Section titled “Candidate Formula Cards”i = io cos (0 - 7) = io cos 7 cos <j> + i0 sin 7 sine = 2;oCe-”’ sin (0 =F co - 7) ji = e~ ”’ J ai cos </) cos co + 6i sin cf) cos co + Ci cos 0 sin coSince e = E cos (0 - 00) = impressed e.m.f.,i = -z | cos (I? - 00- 0J- i~x° cos (00 + OJ j (9)if = 140 cos 0.2 1 - 80 sin 0.2 1,w=j*pdt, (10)f = j (13)K = j^; (21)(B = -j =/z JClinespercm2.7 = -j = yG am-io = eo y j = e02/o. (11)(S!,J = 20,000 lines per cm^. *ii = IQ cos 7 = initial transient current. (14)e = e0 sin (0 - 7), (15)ei = - e0 sin 7 = initial value of transient voltage. (16)i = i\ cos 1/001 sin - , (21)e = e\ cos - + z0ii sin - , (22)T = 2.92 - { 9.21 log’^ , ,\ . + .921 log’^ i ’ ^ ^division with log^^e = .4343.t = im^log’H- .507.e = e-3<S2000 cos 0.2 1 + 3500 sin 0.2 «},er = 2000 cos 0.2 1 + 3500 sin 0.2 1.^l = ^o cos 7 = initial transient current. (14)e = eo sin (0 - 7), (15)ei = - 60 sin 7 = initial value of transient voltage. (16)ii = IQ cos (</> - 7)ei = e0 sin (0 - 7) le = - €Q sin 7i = loe-^cos (0 - 7)i = c<rui cos (0 - 7) ) n 1 xi = ^o cos (0 - t) = io cos y cos 4> + io sin y sin 0i = ii cos 2/0^1 sin-, (21)i = ce~ut cos (0 T co - 7) ) ,17,I = e~^^ < Zi cos 2/0^1 sm -{ = e-3^U40cos0.2^ -80 sin 0.2^ Je = e- ^‘S 2000 cos 0.2 ^ + 3500 sin 0i’ = 140 cos 0.2 t - 80 sin 0.2 1,e’ = 2000 cos 0.2 i + 3500 sin 0.2 1.ii = Iq cos (0 - 7)e = eoe~ ^^ sin (0 - 7)e’ = -eo sin 7i = ce-”’ COS ((/) =F CO - 7) ) .lo = vto = -.J (32)e = e- w« 5 di cos <f) cos co + W sin </> cos co + c/ cos </> sin coi = I cos (d - 45°),e = ir (l - -J; (10)t = 0, i = iv log cii = 0, c = - ,t = 26.8 log ) + 79.6 (37)t = 26.8 log e - 17.9 log (31.25 - 0.125 e) - 0.8. (38)t = 0.04 log e - 0.01333 log (600 - e) - 0.08. (44)t = 0.0274 log e - 0.00073 log (876 - e) - 0.1075, (45)i = 7 cos (6 - d) + A£~a°, (2)E cos 00 - Ir cos d - Ix sin d = 0,E sin 00 - Ir sin d + Ix cos d = 0,i = - cos (0 - 00 - 0X) + As x , (7)i =— cos (d - 60 - ^)-cos (00 + 0,)- e* . (10)transient, starts with the value ij = mi0, and if eQ is the e.m.f.Let e0 = 125 volts = impressed e.m.f. of the circuit, ande.m.f., and the constants of the circuit then are: e0 = 250where c = - - -r;1 = constant, and the minus sign is chosen, aszero of time, Zo = 0, and equations (5) then assume the simplerzero of time, ^o = 0, and equations (5) then assume the simplerwhere L0 = inductance, r0 = total resistance of field-exciting cir-io = eo2/o, where e0 = voltage between cable conductor and ground.where Q = a plus the reluctance of the air gap. Equation (1),This is correct only if g = 0, that is, the conductance, which rep-This is correct only if g = 0, that is, the conductance, which rep-length Z0 = 4 Zi, and therefore the period tQ = cr0/o = 4 o-0/i, thatthe frequencies (2 k - 1)/0, where k = 1, 2, 3 …tuting {t =F ^i) instead of t into the equations (11), where ^i is the