A 6-pole, 24 KW, 120 V, DC machine has a triplex LAP-wound armature which has 72 coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 6 coils that are always beyond poles faces. Assume no internal losses in the machine. Calculate the current per pathin the armature of this machine if its load is 21.5 KW. Select one: d None

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O d. % Efficiency 91.2 %
A 6-pole, 24 KW, 120 V, DC machine has a triplex LAP-wound armature which has 72
coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 6 coils that
are always beyond poles faces. Assume no internal losses in the machine.
Calculate the current per pathin the armatureofthis machine if its load is 21.5 KW.
Select one:
a. 11.11 A
d Nore
Consideraslunt DC motorwith an amature resistanceRA-0252 andterminal voltage VT= 160 V
motor rated stced is 180O RPM The toral field resistance 240 O Assume No armature reaction.
machine
The ariation ottiea re
Tlnalvolrage as a functon of thetieldcurrent is measured under no
Transcribed Image Text:O d. % Efficiency 91.2 % A 6-pole, 24 KW, 120 V, DC machine has a triplex LAP-wound armature which has 72 coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 6 coils that are always beyond poles faces. Assume no internal losses in the machine. Calculate the current per pathin the armatureofthis machine if its load is 21.5 KW. Select one: a. 11.11 A d Nore Consideraslunt DC motorwith an amature resistanceRA-0252 andterminal voltage VT= 160 V motor rated stced is 180O RPM The toral field resistance 240 O Assume No armature reaction. machine The ariation ottiea re Tlnalvolrage as a functon of thetieldcurrent is measured under no
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