Since the inrush current of a 8.5 kW, 200 Volt free excited DC motor with 85% efficiency is limited to 1.5 times the nominal current, the inrush current of this motor is which one? a. 105 A b.75 A c.45A d.90 A e.60A

Q: 90%. Select one: a. Not on the list b. 100 N-m c. 120 N-m d. 178 N-m

A: Given data: Output Power= 25hp (18.65kW) Speed, N= 1000 r/min

Q: The current drawn by a 120 V dc motor with back emf of 110 V and armature :resistance of 0.4 ohms is…

A:

Q: 2. A DC motor with an internal resistance of 10 2 and a voltage constant Kv = 0.10 V/rad/sec is…

A: When load is not connected , Motor draw very less current  from source We can neglect for the…

Q: A dc shunt motor develops 15 hp at 120 V at 120 V. If the armature efficiency is 95%, find the…

A:

Q: O d. RA = 0.125 Ohms A 180-V, DC motor is connected as a cumulatively-compounded DC motor. Its…

A: In this question we need to find a torque of motor

Q: Give a sample problem regarding this topic and its formula: Maximum Power Developed by a Motor v2…

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Q: A dc motor has an electrical power of 150W, speed of w=30rad/s, and a torque of 3N-m. The efficiency…

A: given Input power= 150W w=30 rad/sec torque,τ=3 N-m

Q: Write an article describing the DC Generator. Provide applications of DC generator. Provide the…

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Q: 5. A 20KW dc shunt generator delivering rated output at 1000rpm has a terminal voltage of 500 V. The…

A:

Q: A 200 V DC motor develops a shaft torque of 15 Nm at 1200 r/min. If the efficiency is 80%,determine…

A: Given that  V= 200 v N= 1200 rpm Tsh = 15 Nm Efficiency = 80%

Q: a. A 5-kW AC motor has a power factor of 65% lagging when it is connected to a 200-V 50-Hz mains.…

A: In this question,  We need to determine the current before connect the capacitor and after…

Q: A DO shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field…

A: Given values are - IL=45AVt=220VRa=0.01ohmRsh=44ohmStray losses=375W

Q: While discussing electric motors: Technician A says that when there is high CEMF, there will be high…

A: Given, While discussing electric motors: Technician A says that when there is high CEMF, there will…

Q: 200 V dc series motor draws a current of 50 A while running at 600 rpm. The armature and series…

A: In this question we will find torque developed in dc series motor...

Q: The field and armature resistances of a 220-V series dc motor are 0.2 ohms and 0.1 ohms…

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Q: A 220V DC motor rotating at 1500 rpm (revolution per minute = devir/dakika (d/d)) draws 10A. The…

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Q: Q2/ The open circuit voltage of a separately excited de generator when running at a constant speed…

A: Initial speed of the generator (N1) = 2000 r.p.m The generated e.m.f, Eg1 = 122 V Load voltage (V) =…

Q: 5. A 230V series motor with 4-pole, 600 conductors wave-connected supplying a load of 7.5kW by…

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Q: A DC series motor takes 40 A at 220 V and runs at 800 rpm. If the armature and field resistances are…

A:

Q: Calculate the torque in newton-metre developed by a 440 V dc motor having an amature resistance of…

A: GivenTerminal voltage V=440 vArmature resistance ra=0.25 ΩSpeed N=750 rpmArmature current Ia=60 A

Q: 6. The O.C.C. of a shunt generator when separately-excited and running at 1000 r.p.m. is given by :…

A: 6. The Open circuit characteristics of a shunt generator when separately-excited and running at 1000…

Q: Two series motors run at a speed of 500 r.p.m. and 550 r.p.m. respectively when taking 50 A at 500…

A: We have two series motors we have been asked to find the speed of the combination when this both…

Q: A 220 V dc machine has an armature resistance of 1 ohm. If the full load current is 20 A, the…

A: Given information is shown below:

Q: A 250 V dc motor has an armature resistance of 0.5 Q2. It is drawing an armature current of 25 A,…

A: Given- Terminal voltage, Vt=250 V. Armature resistance, Ra=0.5 Ω. Armature current, Ia=25 A   To…

Q: A 4-pole alternator, on open-circuit, generates 200 V at 50 Hz when the field current is 4 A.…

A:

Q: 2. A 36, 60 Hz, 6 pole, wye-connected induction motor is rated at 600 hp (1 hp = 746 W) and 800 V.…

A:

Q: A 110 V DC motor draws an armature current of 16 A. If the armature resistance is 0.25 Q, compute…

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Q: Q1) A separately excited DC generator supplies 150 A to a DC grid. The generator is running at 800…

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Q: Q- The armature resistance of a permanent magnet dc motor is 0.80. At no load, the motor draws 1.5 A…

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Q: Determine the internal generated voltage of shunt dc motor, giving: Ra=0.7 ohm, Rf=190 ohm, Vt=440v,…

A: Step I     Ra=0.7Ω,   Rf=190Ω   Vt=440V   Poutput=7.46 KW   Efficiency=85%  IL=Ia+IfIf=VtRf

Q: Two generators operating in parallel supply a total load current of 150 A.The terminal potential…

A: A generator is the conversion of mechanical energy into electrical energy, which is used to generate…

Q: A Short shunt compound generator supplies 86 A at 423 V. If the field resistance is 231 0, the…

A: Given: Short shunt compound generator having Terminal voltage, V=423 V Load current, I=86 A Field…

Q: In a given DC motor, the output power is 20 HP, and the rotational losses are 1.1 KW. If the motor…

A:

Q: Iron loss of DC motor is constant with the load. Select one: O True O False

A: Iron loss depends on voltage.  As voltage is constant iron loss is constant.

Q: H.W: A 250 V, 10 kW, separately excited DC generator has an induced e.m.f of 255 V at full load. If…

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Q: A 5 kW, 230 V, d.c shunt motor is operating at rated condition with 82% efficiency. Power drawn form…

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Q: • A 120-V series motor runs at 2000 rpm at full load and takes a current of 12 A. The…

A: Given:Voltage V=120 VFull load current I=12 AArmature resistance Ra=0.3 ΩSeries field resistance…

Q: The total copper loss in an induction machine is found to be 1.5KW if the stator resistance is 0.6…

A: According to Bartleby question answer rules I have to solve only one question.so I solve first one…

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.