Answered: Determine and discuss the advantages…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter5: Resistors

Section: Chapter Questions

Problem 1PA

See similar textbooks

Similar questions

Q1. Calculate the current drawn by a DC Series Motor to develop the maximum power of 2000 Watt, given that the addition of armature and series field resistances is 0.5 ohm.
3. For the simple DC motor system shown below, prove ke kt if the inductance of the winding is negligible. = Supply Vs Voltage i Armature Current VR R Back emf L VL
20. A 25 kW, 250 V dc shunt generator has armature and field resistance of 0.06 ohm and 100 ohms respectively. Determine the total armature power developed when working as a motor taking 25 kW input.
Dc motor
A shunt motor on a 240- V line has an armature current of 75 A. If the field- circuit resistance is 100 ohms, find the field current, the line current, and the kilowatt input to the motor. *
Pleaseeeeee asapppp
A series motor runs at 800 r/min when the voltage is 400 V and the current is 25 A. The armature resistance is 0.4 ohm and the Series field resistance is 0.2 ohm. Determine the following: (a) The constant of the motor. If the speed decreases to 600 r/min,the torque increases by 32% and the field increases by 10%, determine the following: (b) The new armature current. (c) The new field current. (d) The new total resistance of the motor in ohm. (e) The additional resistance inserted in series with the motor in ohm.
Help me solve this one
5. A 20Kw dc shunt generator delivering rated output at 1000rpm has a terminal voltage of 500 V. The armature resistance is 0.1 ohm,voltage drop per brush is 1 V and the field resistance is 500 ohms. Calculate the speed at which this machine will run as a motor taking an input of 20 Kw from 500 V dc.
A DC series motor having a resistance of 0.4 ꭥ and runs at 2000 rpm when connected to 250 V supply and drawing a current of 20 A. (i) What resistance must be added in order to limit the speed to 4000 rpm when armature current is 5A? Assume flux varies linearly. (ii) What resistance must be added to limit the speed to 1000 rpm when armature current is 30 A? Assume that the flux at 30 A is 20% more than that at 20A. (iii) At what speed the motor will run if it is connected directly to 250 V supply when the load is such that the current drawn is 30 A?
A 220 V shunt motor has armature and field resistances of O.5 Q and 220 0 respectively. Initially, the motor is running at 1000 rpm by drawing 10 A current from the supply for fan type of load. Calculat, the new armature current if an external armature resistance of value 5 Q is inserted in the armature circuit. 12 A 5 A O 7A 10 A
The armature and shunt field resistance of a 600 V shunt motor are 1.5 ohm and 600 ohms respectively. When running unloaded the current taken is 3 A and the speed is 1000 r.p.m. Calculate the speed when motor is full loaded and the total current drawn from the supply is 30 A. Estimate the speed at this load if:(i) a resistance of 3 ohms is connected in series with the armature(ii) the shunt current is reduced by 10 percent.

SEE MORE QUESTIONS

Recommended textbooks for you

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS

Determine and discuss the advantages and disadvantages of electric motors in comparison with other existing source of farm power