A series dc motor field coil has 4.5 turns and carries 225 A. The total armature...
A series dc motor field coil has 4.5 turns and carries 225 A. The total armature reaction is 10.00 % of the field MMF. Calculate the net MMF produced.
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A series dc motor field coil has 4.5 turns and carries 225 A.
The total armature...
RedID: Name: Question 3. (18 Marks) A 10-hp, 130V, series dc motor, shown here, has an armature resistance of 0.1 Ω and a series field resistance of also 0.1. The number of turns of series coil N...
RedID: Name: Question 3. (18 Marks) A 10-hp, 130V, series dc motor, shown here, has an armature resistance of 0.1 Ω and a series field resistance of also 0.1. The number of turns of series coil N,-500. At the load 60 A, the speed is 850 r/min. Its magnetization curve is shown below. The core losses are 220 W and the mechanical losses are 230 W at this load. Assume that the mechanical losses vary as the cube of the...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...
A separately-excited DC traction motor of a metro train is in series connection, i.e., the armature...
A separately-excited DC traction motor of a metro train is in series connection, i.e., the armature and the field windings are connected in series with a common DC power source. The voltage of the DC power source is I (a) Please show that the angular velocity of the rotor is KT K where o is the is the angular velocity of the rotor, Ra is the resistance of the armature, Rris the resistance of the field windings, T is the...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns per pole. The armature resistance is 0.12 ohm, the series-field resistance is 0.04 ohm, and the shunt-field resistance is 210 ohms Data for the open-circuit characteristic at 1700 r/min is as follows: Volts 110 200 280 300 Amperes 0.5 1.9 2.35 The generator supplies a load of 15 kW at 200 V when it is driven at 1700 r/min. Determine the speed at which...
1. A 300 V compound motor has armature resistance 0.18 Ω, series field resistance 0.3 Ω...
1. A 300 V compound motor has armature resistance 0.18 Ω, series field resistance 0.3 Ω and shunt field resistance 100 Ω. The rotational losses are 200 W. On full load the line current is 25 A and the motor runs at 1800 rpm. Determine: (i) the developed mechanical power (ii) the output power (iii) the output torque (iv) the efficiency at full load 2. A 120 V series motor has 0.2 Ω field resistance. On full load, the line...
A dc series excited motor is connected to 230V power supply. The resistance of the armature...
A dc series excited motor is connected to 230V power supply. The resistance of the armature winding is 0.25 ohms and the series winding resistance is 0.15 ohms. At 1100 rpm the motor consumes 50A. Calculate the speed of the motor when connected to a 200V power supply. Assume that the motor shaft torque is unchanged.
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
FQ3 3. A 240 V DC series motor with 0.1 ohm armature resistance and 0.1 ohm...
FQ3
3. A 240 V DC series motor with 0.1 ohm armature resistance and 0.1 ohm field resistance runs at 1200 rpm and 100 Amp. of full load speed and armature current respectively. The motor has a brush contact drop of 2 volts. Find the motor full load torque and efficiency If the motor is to drive a pump that requires a torque of 150 NM, find the speed as the motor drives the given pump. a. b.
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance...
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance Rf of 40 Ω, and an armature resistance Ra of 250 mm2. The field winding has 1500 turns. An adjustable resistance Rad is connected in series to the field winding. Rad is set at 20 Ω, but it can vary from 0 to 80 Ω. The magnetization curve is shown in Figure.1 and it is taken at a speed of 1200 rpm. (Armature reaction...
A series of excitation DC motors have an armature winding resistance of 0.3 ohms, a field...
A series of excitation DC motors have an armature winding resistance of 0.3 ohms, a field winding resistance of 0.1 ohms, a rotational speed of 650 rpm, a back emf is 120 V, and an armature current of 78 A. If the torque is constant, 0.6 ohms is connected in series with the armature, what is the speed of the motor after it is stabilized?
RedID: Name: Question 3. (18 Marks) A 10-hp, 130V, series dc motor, shown here, has an armature resistance of 0.1 Ω and a series field resistance of also 0.1. The number of turns of series coil N,-500. At the load 60 A, the speed is 850 r/min. Its magnetization curve is shown below. The core losses are 220 W and the mechanical losses are 230 W at this load. Assume that the mechanical losses vary as the cube of the...
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...
A separately-excited DC traction motor of a metro train is in series connection, i.e., the armature and the field windings are connected in series with a common DC power source. The voltage of the DC power source is I (a) Please show that the angular velocity of the rotor is KT K where o is the is the angular velocity of the rotor, Ra is the resistance of the armature, Rris the resistance of the field windings, T is the...
A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns per pole. The armature resistance is 0.12 ohm, the series-field resistance is 0.04 ohm, and the shunt-field resistance is 210 ohms Data for the open-circuit characteristic at 1700 r/min is as follows: Volts 110 200 280 300 Amperes 0.5 1.9 2.35 The generator supplies a load of 15 kW at 200 V when it is driven at 1700 r/min. Determine the speed at which...
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
FQ3
3. A 240 V DC series motor with 0.1 ohm armature resistance and 0.1 ohm field resistance runs at 1200 rpm and 100 Amp. of full load speed and armature current respectively. The motor has a brush contact drop of 2 volts. Find the motor full load torque and efficiency If the motor is to drive a pump that requires a torque of 150 NM, find the speed as the motor drives the given pump. a. b.
A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance Rf of 40 Ω, and an armature resistance Ra of 250 mm2. The field winding has 1500 turns. An adjustable resistance Rad is connected in series to the field winding. Rad is set at 20 Ω, but it can vary from 0 to 80 Ω. The magnetization curve is shown in Figure.1 and it is taken at a speed of 1200 rpm. (Armature reaction...
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