:A: Answer (five) of the following questions: と。 C cannot travel for very longer distanse. If does, it loses electric power. (True y Ise) Vhat is the Characteristics of Shunt D.C. Motors? (High starting torque, Variable eed Medium starting torque, none of these ) he steady magnetism makes the AC to flow in a single direction. (True/False) What is the Characteristics of Series D.C. Motors?(High starting torque, Médium rting torque, constant speed , none of these) Clectrons in DC keep changing its directions- backward and forward. (True /False) Vhat is the Applications of Compound D.C. Motors? (For driving constant speed. r intermittent high torque loads, cars, none of these)

:A: Answer (five) of the following questions: と。 C cannot travel for very longer distanse. If does, it loses electric power. (True y Ise) Vhat is the Characteristics of Shunt D.C. Motors? (High starting torque, Variable eed Medium starting torque, none of these ) he steady magnetism makes the AC to flow in a single direction. (True/False) What is the Characteristics of Series D.C. Motors?(High starting torque, Médium rting torque, constant speed , none of these) Clectrons in DC keep changing its directions- backward and forward. (True /False) Vhat is the Applications of Compound D.C. Motors? (For driving constant speed. r intermittent high torque loads, cars, none of these)

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A 220V shunt generator has an armature resistance of 0.02ohms and a shunt field resistance of 44ohms. at rate load, the driving engine develops 62.26hp. If the iron and friction losses amount to 1600W, how much is the current delivered to the load at this condition? (Our subject is ELECTRICAL MACHINE 1, and our lesson is Losses and Efficiency on the DC MACHINE) (I need a clean solution ma'am/sir. Thank you do much)
a 220V shunt generator has an armature resistance of 0.02ohms and a shunt field resistance of 44 ohms. at rate load, the driving engine develops 62.26 hp. If the iron and friction losses amount to 1600W, how much is the current delivered to the load at this condition? (Our subject is ELECTRICAL MACHINE 1, and our lesson is Losses an Efficiency in DC Machine) (I need clean solution ma'am/sir, thank you so much)
With the aid of mathematical expressions where necessary, explain the following terms with respect to squirrel cage induction motorsi. Stray Lossesii. Air gap Poweriii. Rotational lossesiv. Friction and Windage lossesv. Stator Copper lossesvi. Rotor Copper lossesvii. Mechanical Losses
A 220V shunt generator has armature resistance of 0.2 ohms and a shunt resistance of 44 ohms. At rated load, the driving engine develops 62.5HP. if the iron and friction losses amount 1600W, how much is the current delivered to the load at rated condition?
A 460V, 25 hp, 60 Hz, 4 pole, Y-connected wound rotor(R2) has the following impidances in Ω/phase refered to the stator circuit. R1= 0.64 Ω , X1= 1.106Ω , R2=0.332Ω ,X2=0.464Ω , Xm=26.3 a)Torque max? b) Slip max? c) Wm at which Torque max occurs?? d) Starting Torque? e) If R2 is doubled what is the speed at which the max torque occurs now? f) Plot the original torque-speed curves and the adjusted T (with R2^2)
A 25kW, 250V DC shunt generator has armature and field resistances of 0.06 ohm and 100 ohm respectively. Determine the total armature power developed when working (i) as a generator delivering 25kW output and (ii) as a motor taking 25kW.
what is the best suitable motor for below application? In a belt conveyor system used to transport bulk solids, the belt speed is required to be maintained constant at the set speed all the time irrespective of the bulk solids content on the belt. Hence, the electric motor used in this system should be able to operate more or less at a constant speed in a wide range of different torque values.
With the aid of mathematical expressions explain the following terms with respect to squirrel cage induction motorsi. Stray Lossesii. Air gap Poweriii. Rotational lossesiv. Friction and Windage lossesv. Stator Copper lossesvi. Rotor Copper lossesvii. Mechanical Losses
A 12-phase ∆-connected 3200 V (line-to-line), 12,000 kW, 50 Hz, twelve-polesquirrel-cage induction drive is designed for electric vehicle use. The drive has thefollowing equivalent parameter values in Ω/phase referred to the stator:R1= 0.697 Ω R2= 0.328 Ω Rm1 = 226 ΩX1 = 0.549 Ω X2 = 0.456 Ω Xm1 = 31.573 ΩThe total friction, windage, and core losses are assumed to be constant at Plosses=1156 W, independent of load.a)Draw the equivalent circuit for this drive and show the relevant parameters onthe circuit.For a slip value of s = 0.032 and using the above equivalent circuit parameters,determine: b) The stator current and the power factor c) The synchronous speed and the rotor speed for this drive d) The torque generatede) The input power for this operating conditionf) The efficiency when operated at rated voltage and frequencyg) Considering the design of this motor, state if it is possible to start this drive witha slip ring starter. Give reasons to justify your answer. just need answer…
A 12-phase ∆-connected 3200 V (line-to-line), 12,000 kW, 50 Hz, twelve-polesquirrel-cage induction drive is designed for electric vehicle use. The drive has thefollowing equivalent parameter values in Ω/phase referred to the stator:R1= 0.697 Ω R2= 0.328 Ω Rm1 = 226 ΩX1 = 0.549 Ω X2 = 0.456 Ω Xm1 = 31.573 ΩThe total friction, windage, and core losses are assumed to be constant at Plosses=1156 W, independent of load.a)Draw the equivalent circuit for this drive and show the relevant parameters onthe circuit.For a slip value of s = 0.032 and using the above equivalent circuit parameters,determine:b) The stator current and the power factorc) The synchronous speed and the rotor speed for this drived) The torque generatede) The input power for this operating conditionf) The efficiency when operated at rated voltage and frequencyg) Considering the design of this motor, state if it is possible to start this drive witha slip ring starter. Give reasons to justify your answer
A belt-driven 100-kW, shunt generator running at 300 RPM on 220-V busbars continues to run as a motor when the belt breaks, then taking 10 kW. What will be its speed when the armature resistance = 0.025 ohms, field resistance = 60 ohms and contact drop under each brush = 1 V? Assume the flux deteriorates by 25% when ran as a motor.
2 a. The back-EMF generated by a DC motor is greatest when the motor is a) standing still b) running at full-load c) running with no-load d) none of the above b. Which of the following is/are considered a loss of a DC motor? a) power losses in the armature and field b) windage c) friction d) all of the above c- When it is said that a motor has good speed regulation it means the motors speed changes__________ from no-load to full-load. a) little b) a lot c) tremendously d) none of the above