Q/ When a series dc motor is operated at load, which of the following conditions occurs Ans 1- The field current increases 2- The armature speeds increases 3- The armature current decreases 4- The voltage requirement increases

Q/ When a series dc motor is operated at load, which of the following conditions occurs Ans 1- The field current increases 2- The armature speeds increases 3- The armature current decreases 4- The voltage requirement increases

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 19RQ: Why is the starting torque per A of starting current of a wound-rotor motor higher than that of a...

See similar textbooks

Related questions

Q: A shunt de motor runs at 1200 rpm on no load and draws 6A from 240V main supply. The armature…

A: Given parameters are: No-Load Speed,NNL=1200rpm, The load current when the motor is at no-load,…

Q: A 220 V dc shunt motor takes 5A and 40A at no load and full load respectively. It has an armature…

A: Given: A DC shunt motor having Voltage supply, V=220 V No load current, IL0=5 A Full load current,…

Q: A 220 V, 7 A, 1100 rpm DC shunt motor has armature and field resistance of 1.75 02 and 250 n…

Q: A 230-V shunt motor draws 5 A at a no-load speed of 2400 rpm. The shunt- field resistance is 115 0,…

A: In the DC shunt motor, 230V, At no load draw current 5A, No load speed No= 2400 rpm Field…

Q: calculate the torque in newton metre developed by a 440v dc motor having an armature resistance of…

A: To calculate the torque

Q: A 30 hp, 240 V, 1150 rpm DC shunt motor, operating at rated conditions, has an efficiency of 88.5…

A: Given:Pout=30hp=30×746Pout=22380WV=240VoltN=1150 rpmη=88.5%Ra=0.064ΩRf=93.6Ω

Q: B) The armature circuit resistance of a 25 hp, 250 V series motor is 0.1 ohms, the brush volt drop…

Q: The armature of a 270V dc shunt motor has a resistance of 0.20 ohm. If the armature current is not…

A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…

Q: 500 V DC shunt motor runs at its normal speed of 250 RPM when the armature current is 200 A. The…

Q: . a)Briefly explain ‘armature reaction’ and its effect with the help of a suitable diagram.…

A: Armature reaction is the effect that armature field is made in main field. Or we can say that it is…

Q: If the voltage applied across the armature of a DC shunt motor is increased by 5% keeping its load…

A: generated emf in armature E = flux ×speed×no. of conductors60 ×no. of polesno. of parallel paths…

Q: A 250 V DC long-shunt, compound motor takes a current of 82 A at full load. Calculate the motor…

A: There are two types of compound motor.in commulative compound motor, shunt field add the series…

Q: 120V dc shunt motor has an armature resistance of 0.25Ω is drawing 50A. If a fixed loss of 200W was…

A: A dc shunt motor has, Terminal voltage ( Vt) = 120 V Armerture resistance (Ra) = 0.25 ohm Line…

Q: See attached.

A: (a)Assume ra = 0, then Eb1= Eb2 = terminal voltage = VT = 125 V.

Q: Q3/ ..il. b- A 220 V, shunt DC motor takes an armature current of 18 A. The armature resistance is…

Q: 270V dc shunt motor's armature has a resistance of 0.20 ohm. Calculate the following if the armature…

A: The solution is given below

Q: Q/ When a series dc motor is operated without a load, which of the following conditions occurs? *…

A: This is a basic concept question of electrical machines subject from the dc machines topic. In this…

Q: A 240 V, shunt DC motor takes an armature current of 20 A when running at 960 rpm. The armature…

A: Given that Ia1=20 Ara=0.2 ohmN1=960 rpmVt=240VIa0(no load)=1A calculate back emf for both condition…

Q: Q.17 A 440 V dc shunt motor has no-load speed of 2000 rpm. It is running at 1000 rpm at full load…

A: The solution is given below.

Q: A 220 V shunt motor takes a total current of 50 A. If the field winding resistance is 80Ω and the…

Q: A 220 V shunt motor has armature and field resistance of 0.2 2 and 220 2 respectively. The motor is…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: for the shunt excited motor running at 1250 rpm, the shunt field current is 0.6A and the armature…

Q: A 30 hp, 240 V, 1150 rpm DC shunt motor, operating at rated conditions, has an efficiency of 88.5…

A: Given p=30 hpV=240 VN=1150 rpmRa=0.064 ΩRf=93.6 Ω

Q: 5. In a DC shunt motor, speed is related to armature current as _____________ a) Directly…

A: 5.) As the armature current increases there is a decrease in speed. Hence the armature current and…

Q: A 220-V dc short-shunt compound motor has an armature series field and shunt field resistances of…

Q: Q15) Armature resistance of a 230V shunt motor is 0.6 Ω and no load current is 2.5A. When the rotor…

A: Armature resistance of a 230V shunt motor 0.6 Ω no load current is 2.5A. When the rotor is loaded it…

Q: A 220 V dc shunt motor draws an armature current of 50 A and runs at 600 rpm. The armature and shunt…

A: In this question, A 220 V dc shunt motor Case 1 . It draws an armature current of 50 A and runs at…

Q: A 25 kW, 230 V shunt motor has an armature resistance of 0.11 Q and a field resistance of 117 Q. At…

A: Fig: Given shunt motor circuit diagram Given that P=25 KW no load…

Q: R. 4 la Load Ea Interpole Series Figure 2(b) Stabilized DC shunt motor a) Determine the armature…

A: Given A 240V, 50hp, 1200rpm stabilized shunt motor, operating at rated conditions, has an efficiency…

Q: 440V DC shunt motor takes an armature current of 60A when its speed is 750 rpm. Determine the torque…

Q: Consider a shunt DC motor with an armature resistance RA=0.2 ohm and terminal voltage VT = 160 V.…

A: Given Data: VT = 160 V Ra = 0.2 ohm Ia = 60 A N = 1517 rpm Ploss = 848 Watt

Q: Armature resistance of a 230V shunt motor is 0.6 Ω and no load current is 5A. When the rotor is…

Q: 600V, DC series motor operates at 600 rpm and rated load. Armature resistance 0.1 ohm and series…

Q: Manual Control: Design a dc motor circuit to drive an assembly line consisting of a conveyor belt…

A: In the given drive circuit the dc motor used to drive conveyor at a constant speed of 150 rpm for…

Q: A 220-V Shunt DC motor, 15 kW, 850 rpm draws 72.2-A when operating at rated condition. The…

Q: نقطة واحدة Indicate whether the following * statement are true or false False True The…

A: Consider the list for the characteristic curve is shown below. (i) Torque vs armature current…

Q: A 107 hp, 257 V dc shunt motor has the magnetization curve in the graph. The armature circuit…

A: Given a 107 hp =79.7 kW, 257 V dc shunt motor has the magnetization curve in the graph. The armature…

Q: 360 V DC serial motor has a starting current value of 60 A. Total armature resistance (Ra) value is…

A: Given V=360 V DC series motor Ist=60 A Ra=2Rs IFL=0.1Ist N=1000

Q: A 250V shunt motor runs at its normal speed of 25rps when the armature current is 100A.The…

A: Given data: V=250 VN=25 rps=1500 rpmIa=100 ARa=0.6 ΩIsh'=0.75 IshIa'=80 A

Q: 4 A shunt DC motor is operated at no-load at rated voltage 220 V, speed 1700 rpm and armature…

Q: A 220 V, 7 A, 1100 rpm DC shunt motor has armature and field resistance of 1.750 and 250 n…

Q: A 120 V shunt motor has armature and field resistances of 0.2 2 and 100 2, respectively. When no…

Q: 230 V dc shunt motor takes 30 A from the source at rated load. The armature and shunt field…

A: In this question we will find stray power loss in dc shunt motor....

Q: A shunt DC motor is operated at no-load at rated voltage 220 V, speed 1700 rpm and armature current…

A: In this question we need to find a speed of motor when armature current is 43 A

Q: 2. A SEDC motor has an armature resistance of 1.15 ohm and an armature voltage constant kv=0.78…

A: For full have half controlled single -phase converter . Average armature curent Ia = Vmπ R1 +Cosα…

Q: A shunt motor designed to operate at 115 V, has an armature resistance is 0.12 ohms and the motor is…

A: Armature current =(terminal voltage- back emf)/(armature resistance+ external resistance).

Q: A 500 V DC shunt motor runs at its normal speed of 250 RPM when the armature current is 200 A. The…

A: The speed when the resistance is placed in the field circuit, reducing the shunt field to 80% of…

Q: Mark the correct statements about armature controlled DC motors given below. (You can select…

A: DC motor is a machine that converts the electrical energy of DC type into mechanical energy.

Q: a 220 V dc shunt motor has armature resistance 0.23 ohm, on load it takes armature current 40 A and…

A: A DC motor is a machine which takes DC electrical energy and produces mechanical output at its…

Concept explainers

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A certain dc motor has RA=1.3 Ω, IA=10 A and produces a back emf EA=240 V, while operating at a speed of 1200 rpm. Determine the voltage applied to the armature, the developed torque, and the developed power.
A series dc motor 20-hp, 500-V, is having armature, series field and shunt field winding resistances of 0.08 Ω, 0.3 Ω and 125 Ω, respectively. If the back – emf is 478 V, determine the motor current when the connection is a) long – shunt. b) short – shunt c) series d) shunt
1- A 10kW, 200V, DC Shunt motor has 1-ohm armature resistance. At the starting of the motor, its back emf (Eb) is zero.Select one:TrueFalse 2- Identify which of the following loss is not varying with respect to load current? a.Iron loss b.Both Armature and Series field copper losses c.Series field Copper Loss d.Armature Copper Loss
A 100hp, 250 V, 1200 rpm shunt DC motor with an armature resistance of 0.03 Ω and a field resistance of 41.67 Ω. The motor has compensating windings, so armature reaction can be ignored. Mechanical and core losses may be assumed to be negligible for the purposes of this problem. The motor is assumed to be driving a load with a line current of 126 A and an initial speed of 1103 rpm. To simplify the problem, assume that the amount of armature current drawn by the motor remains constant. what is the motor's speed if the field resistance is raised to 50 Ω? can you help me to find N2?
a 220v dc shunt motor takes 5a and 40a at no load and full load respectively it has an armature resistance of 0.2 ohm and field resistance of 110 ohm respectively. iron,friction and windages losses are negligible.then using among parameters find following. calculate emf at full load of dc motor
A 25-kW, 230-V shunt motor has an armature resistance of 0.11Ω and a field resistance of 117Ω. At no load and rated voltage, the speed is 2150 r/min and the armature current is 6.35 A. At full load and rated voltage, the armature current is 115 A and, because of armature reaction, the flux is 6 percent less than its no-load value. What is the full-load speed? than its noload value. What is the full-load speed? current is 115 A and, because of armature reaction, the flux is 6 percent less than its no-load value. What is the full-load speed?
The armature resistance of a compound direct current motor with short shunt is 0.15 , the series winding resistance is 0.25  and the shunt winding The resistance is given as 800 . The armature of the DC motor with a terminal voltage of 120 is 1400 rpm. If it draws 12 amps from the motor terminals while rotating, the torque produced by the motor and Find the efficiency of the engine.
a 220v dc shunt motor takes 5a and 40a at no load and full load respectively it has an armature resistance of 0.2 ohm and field resistance of 110 ohm respectively. iron,friction and windages losses are negligible.then using among parameters find following. the armature current at no load
The armature resistance of a compound direct current motor with a short shunt connection is 0.15Ω , series winding resistance 0.25Ω and shunt winding The resistance is given as 800Ω. The armature of the DC motor with a terminal voltage of 120 is 1400 rpm. If it draws 12 amps from the motor terminals while rotating, the torque produced by the motor and Find the efficiency of the engine.
a 120v dc shunt motor has an armature resistance of 0.25 ohms is drawing 50a. if a fixed loss of 200w was measured and neglecting the shunt field what is the bhp of the motor in Hp? (meaning no shunt field used)
A 10 kW, 250V shunt motor has an armature resistance of 0.5ohm and a field resistance of 200ohm. At no load and rated voltage, the speed is 1200 rpm and the armature current is 3A. At full load and rated voltage, the current line is 47A and because of armature reaction, the flux is 4% less than it no load value. (a.) What is the full load speed? (b.)What is the developed torque at full load? 1158 rpm
A Four pole, 50kW, 250 Volt Long Shunt DC Machine Motor has a shunt field current of 1.5 A. It is Lap-winded with 872 conductors, and a rated speed of 1200 RPM. When Ra = 0.1 Ohms, and Rse = 0.05 Ohms. Solve for the following: Shaft Torque and Torque Developed Speed Regulation if at full load the speed drops to 1125 RPM