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A DC Motor 24 of 25 > Part A A shunt-wound DC motor with the field...
A shunt-wound DC motor with the field coils and rotor connected in parallel (see the figure)...
A shunt-wound DC motor with the field coils and rotor connected
in parallel (see the figure) (Figure 1) operates from a 130 V DC
power line. The resistance of the field windings, Rf, is
234 ? . The resistance of the rotor, Rr, is 4.10 ? . When
the motor is running, the rotor develops an emf E. The motor draws
a current of 4.82 A from the line. Friction losses amount to 47.0 W
.
In a shunt-wound dc motor with the field coils and rotor connected in parallel (see the...
In a shunt-wound dc motor with the field coils and rotor
connected in parallel (see the figure (Figure 1)), the resistance
Rf of the field coils is Rf = 103 Ω and the resistance Rr of the
rotor is Rr = 5.5 Ω. When a potential difference of V = 120 V is
applied to the brushes and the motor is running at full speed
delivering mechanical power, the current supplied to it is 4.90
A.
Part A.) What is...
The power input to a dc shunt motor during rated-load conditions is 100 W. The rotor...
The power input to a dc shunt motor during rated-load conditions
is 100 W. The rotor speed is 2000 r/min, and the armature voltage
is 100 V. The armature resistance is 2? and Rf = 200 ?. Calculate
the no-load rotor speed.
2. The power input to a dc shunt motor during rated-load conditions is 100W. The rotor speed is 2000r/min, and the armature voltage is 100V. The armature resis- tance is 2 Ω and Rf-200Ω. Calculate the no-load rotor...
A 240V DC shunt motor runs at 800rpm at no load. Determine the resistance to be...
A 240V DC shunt motor runs at 800rpm at no load. Determine the resistance to be placed in series with the field so that the motor runs at 950rpm when taking an armature current of 20A. The field resistance is 1600 and armature resistance is 0.40. Assume that the pole flux is proportional to the field current Additional Rf=
A 240V DC shunt motor runs at 800rpm at no load. Determine the resistance to be placed in series with the...
A shunt connected DC motor has independent control over armature and field c The motor ratings...
A shunt connected DC motor has independent control over armature and field c The motor ratings are P watts, n RPM, Ia armature amperes, V volts on the armature, and Ir field amperes. Assuming a linear magnetic structure and ignoring all losses (resistance, windage and friction) complete the following table. Show your calculations Field Current VoltageArmatureSpeed Current Torque Power Ratings Case l Case 2 Case 3 ½la 2 1r
Problem 3: DC machine A shunt DC motor rated at V,'. 300 V, with field resistance...
Problem 3: DC machine A shunt DC motor rated at V,'. 300 V, with field resistance of Rf 600 0, armature 0.2 , resistance of R, 30.5 A (total current) when rated-load at n, consumes 916.8 rpm. Armature rotational loss (consisting of fan, friction and core loss (consisting of field resistance, armature a) Find Prot (rotational load), Pshaft and efficiency at rated load. - Assume that the rotational loss is constant and P,aft is now 50% in the case of...
A 6 hp, 180 V shunt dc motor draws a full-load current of 30 A from the power supply. The motor h...
A 6 hp, 180 V shunt dc motor draws a full-load current of 30 A from the power supply. The motor has a field (shunt) resistance of 150 Ω. The armature resistance of the motor is 0.1 Ω. When the motor speed is 1800 rpm (this is not the full-load speed), the relationship between the induced voltage
Q1 [35] DC shunt motor has the following parameters: 10,1 kW, 150 V, 805 rpm, R=0.212,...
Q1 [35] DC shunt motor has the following parameters: 10,1 kW, 150 V, 805 rpm, R=0.212, R=200 2. When the motor is not loaded it draws 10 A from the voltage source of 150 V. a) [10]Calculate the efficiency at full load, rotating at 805 rpm. b) [10] Calculate the torque when there is no load on the rotor. c) [15] If total torque on the rotor is 91 Nm, calculate the control resistance of the armature to set the...
a dc motor with its rotor and filed coils connected in serieshas an internal resistance of...
a dc motor with its rotor and filed coils connected in serieshas an internal resistance of 3.2Ω. when running at full load on a 120-v lined,the emf inthe rotor is 105V. a)what is the current drawn by the motor from the line? b)what is the power delivered to the motor? c) what is the mechanical power developed by this motor? these are the questions....
A 250-V shunt-connected DC motor runs at 1500 rpm when it is not connected to any...
A 250-V shunt-connected DC motor runs at 1500 rpm when it is not connected to any external load. When the motor is connected to an external load, it draws a line current of 40A. The motor has an armature resistance of 1 ? and a field circuit resistance of 100 ?. Assume that the rotational loss torque is 2 Nm and is independent of the speed (a) Find the line current of the motor when there is no external load....
A shunt-wound DC motor with the field coils and rotor connected
in parallel (see the figure) (Figure 1) operates from a 130 V DC
power line. The resistance of the field windings, Rf, is
234 ? . The resistance of the rotor, Rr, is 4.10 ? . When
the motor is running, the rotor develops an emf E. The motor draws
a current of 4.82 A from the line. Friction losses amount to 47.0 W
.
In a shunt-wound dc motor with the field coils and rotor
connected in parallel (see the figure (Figure 1)), the resistance
Rf of the field coils is Rf = 103 Ω and the resistance Rr of the
rotor is Rr = 5.5 Ω. When a potential difference of V = 120 V is
applied to the brushes and the motor is running at full speed
delivering mechanical power, the current supplied to it is 4.90
A.
Part A.) What is...
The power input to a dc shunt motor during rated-load conditions
is 100 W. The rotor speed is 2000 r/min, and the armature voltage
is 100 V. The armature resistance is 2? and Rf = 200 ?. Calculate
the no-load rotor speed.
2. The power input to a dc shunt motor during rated-load conditions is 100W. The rotor speed is 2000r/min, and the armature voltage is 100V. The armature resis- tance is 2 Ω and Rf-200Ω. Calculate the no-load rotor...
A 240V DC shunt motor runs at 800rpm at no load. Determine the resistance to be placed in series with the field so that the motor runs at 950rpm when taking an armature current of 20A. The field resistance is 1600 and armature resistance is 0.40. Assume that the pole flux is proportional to the field current Additional Rf=
A 240V DC shunt motor runs at 800rpm at no load. Determine the resistance to be placed in series with the...
A shunt connected DC motor has independent control over armature and field c The motor ratings are P watts, n RPM, Ia armature amperes, V volts on the armature, and Ir field amperes. Assuming a linear magnetic structure and ignoring all losses (resistance, windage and friction) complete the following table. Show your calculations Field Current VoltageArmatureSpeed Current Torque Power Ratings Case l Case 2 Case 3 ½la 2 1r
Problem 3: DC machine A shunt DC motor rated at V,'. 300 V, with field resistance of Rf 600 0, armature 0.2 , resistance of R, 30.5 A (total current) when rated-load at n, consumes 916.8 rpm. Armature rotational loss (consisting of fan, friction and core loss (consisting of field resistance, armature a) Find Prot (rotational load), Pshaft and efficiency at rated load. - Assume that the rotational loss is constant and P,aft is now 50% in the case of...
Q1 [35] DC shunt motor has the following parameters: 10,1 kW, 150 V, 805 rpm, R=0.212, R=200 2. When the motor is not loaded it draws 10 A from the voltage source of 150 V. a) [10]Calculate the efficiency at full load, rotating at 805 rpm. b) [10] Calculate the torque when there is no load on the rotor. c) [15] If total torque on the rotor is 91 Nm, calculate the control resistance of the armature to set the...
A 250-V shunt-connected DC motor runs at 1500 rpm when it is not connected to any external load. When the motor is connected to an external load, it draws a line current of 40A. The motor has an armature resistance of 1 ? and a field circuit resistance of 100 ?. Assume that the rotational loss torque is 2 Nm and is independent of the speed (a) Find the line current of the motor when there is no external load....
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