Mechanical loss= P2(0) = V2(0).I2(0) - I22(0).Ra =212x0.5-0.52*4.7=104.825 Mechanical Output Power(Pout) = P2 P2(0) = Mech. Power developed Mech. Loss – – = (Elec. input power– Armature copper loss) Mech. Loss – = (Pin - I22.Ra) - P2(0) =[(210-12*4.7)-104.825]=100.475 Torque produced (T)= = = 0.643 Nm Observation Calculations Speed(Nr) Copper Mech. V2 Pout I2(A) I2(0)(A) V2(0)(V) Pin(W) loss Loss Torque(Nm) (V) (W) rpm rad/s (W) (W) 156.22 1 210 1491.8 0.5 212 210 4.7 104.825 100.475 0.643 155.2 2 208 1482 0.5 212 416 18.8 104.825 292.375 1.884 154.99 3 206 1480 0.5 212 618 42.3 104.825 470.875 3.038 154.39 4 206 1474.3 0.5 212 824 75.2 104.825 643.975 4.171 5 204 1466.4 153.56 0.5 212 1020 117.5 104.825 797.675 5.195 6 204 1461.4 153.04 0.5 212 1224 169.2 104.825 949.975 6.207 7 204 1455.8 152.45 0.5 212 1428 230.3 104.825 1092.88 7.169 8 200 1450.8 151.93 0.5 212 1600 300.8 104.825 1194.38 7.862 9 200 1443.1 151.12 0.5 212 1800 380.7 104.825 1314.48 8.698 10 198 1435.9 150.37 0.5 212 1980 470 104.825 1405.18 9.345 Series DC motor Speed Vs Torque
Mechanical loss= P2(0) = V2(0).I2(0) - I22(0).Ra =212x0.5-0.52*4.7=104.825 Mechanical Output Power(Pout) = P2 – P2(0) = Mech. Power developed – Mech. Loss = (Elec. input power– Armature copper loss) – Mech. Loss = (Pin - I22.Ra) - P2(0) =[(210-12*4.7)-104.825]=100.475 Torque produced (T)= = = 0.643 Nm Observation Calculations I2(A) V2 (V) Speed(Nr) I2(0)(A) V2(0)(V) Pin(W) Copper loss (W) Mech. Loss (W) Pout (W) Torque(Nm) rpm rad/s 1 210 1491.8 156.22 0.5 212 210 4.7 104.825 100.475 0.643 2 208 1482 155.2 0.5 212 416 18.8 104.825 292.375 1.884 3 206 1480 154.99 0.5 212 618 42.3 104.825 470.875 3.038 4 206 1474.3 154.39 0.5 212 824 75.2 104.825 643.975 4.171 5 204 1466.4 153.56 0.5 212 1020 117.5 104.825 797.675 5.195 6 204 1461.4 153.04 0.5 212 1224 169.2 104.825 949.975 6.207 7 204 1455.8 152.45 0.5 212 1428 230.3 104.825 1092.88 7.169 8 200 1450.8 151.93 0.5 212 1600 300.8 104.825 1194.38 7.862 9 200 1443.1 151.12 0.5 212 1800 380.7 104.825 1314.48 8.698 10 198 1435.9 150.37 0.5 212 1980 470 104.825 1405.18 9.345 Series DC motor Speed Vs Torque
116541759-090075m-DC-Motors.docx