Consider a separately-excited DC motor with an armature resistance RA= 0.25 N and terminal voltage VT= 120 V. The motor rated speed is 1800 RPM. The field winding supply VF= 36 V and the field resistance is adjustable. The motor has compensating windings and interpoles. IF (A) EA (V) 0.3 85 These values were taken at speed n=1800RPM 0.0 0.1 0.2 0.4 0.5 0.6 0.7 0.8 30 60 102 115 124 130 134 If the motor is driving a load at rated armature current Ia = 46 A, with Radj + Rf=1202. Find the speed of rotation of the motor in RPM. Select one: O a. None O b. Speed n = 1410 RPM O c. Speed n = 1800 RPM O d. Speed n = 2298 RPM

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Consider a separately-excited DC motor with an armature resistance RA= 0.25 N and terminal voltage VT= 120 V. The motor rated speed is 1800 RPM. The field winding supply VF= 36 V and the field resistance is adjustable. The motor has compensating windings and interpoles. IF (A) EA (V) 0.3 85 These values were taken at speed n=1800RPM 0.0 0.1 0.2 0.4 0.5 0.6 0.7 0.8 30 60 102 115 124 130 134 If the motor is driving a load at rated armature current Ia = 46 A, with Radj + Rf=1202. Find the speed of rotation of the motor in RPM. Select one: O a. None O b. Speed n = 1410 RPM O c. Speed n = 1800 RPM O d. Speed n = 2298 RPM

Consider a separately-excited DC motor with an armature resistance RA= 0.25 Nand terminal voltage VT =
120 V. The motor rated speed is 1800 RPM. The field winding supply VF= 36 V and the field resistance is
adjustable. The motor has compensating windings and interpoles.
IF (A)
EA (V)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
30
60
85
102
115
124
130
134
These values were taken at speed n=1800RPM
If the motor is driving a load at rated armature current IA = 46 A, with Radi +RF =1202.
Find the speed of rotation of the motor in RPM.
Select one:
O a. None
O b. Speed n 1410 RPM
O c. Speed n = 1800 RPM
O d. Speed n = 2298 RPM
Transcribed Image Text:Consider a separately-excited DC motor with an armature resistance RA= 0.25 Nand terminal voltage VT = 120 V. The motor rated speed is 1800 RPM. The field winding supply VF= 36 V and the field resistance is adjustable. The motor has compensating windings and interpoles. IF (A) EA (V) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 30 60 85 102 115 124 130 134 These values were taken at speed n=1800RPM If the motor is driving a load at rated armature current IA = 46 A, with Radi +RF =1202. Find the speed of rotation of the motor in RPM. Select one: O a. None O b. Speed n 1410 RPM O c. Speed n = 1800 RPM O d. Speed n = 2298 RPM
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