A• universal series motor has a resistance of 30 and an inductance of X Henry. when connected to a 250 V dc supply and loaded to take .0.8 A it runs at 2000 rpm Determine the value of X if the power factor is 0.6, when connected to a 250 V, 50 Hz ac supply and loaded to take the 1A,then find the torque

A• universal series motor has a resistance of 30 and an inductance of X Henry. when connected to a 250 V dc supply and loaded to take .0.8 A it runs at 2000 rpm Determine the value of X if the power factor is 0.6, when connected to a 250 V, 50 Hz ac supply and loaded to take the 1A,then find the torque

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...

See similar textbooks

Similar questions

In a three-phase induction motor the maximum torque occurs at 20% slip and the equivalent resistance of the secondary is 0.04Ω per phase. Find the equivalent load resistance and the load voltage and the load current. Output power is 20 kW.
• Q5/ in a DC motor. List and describe the types of losses that occur
A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. ▾ Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit ▾ Part B Value μÀ Submit I= Value Provide Feedback ^ Request Answer If the dc-to-ac converter has a power efficiency of 85 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. 4 Ò Request Answer Units ? Units ?
the field windings of a series motor has a resistance of 120 ohms at 15° c. after running for 2 hours, the resistance has increases to 140 ohms. if the temperature coefficient of the windings at 0°C is 0.004, find the new temperature of the windings
In DC generators, lap winding is suitable for ) high voltage, high current O low voltage, high current O high voltage, low current O ) low voltage, low curren O
A four-pole induction motor drives a load at 2478 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit Part B Value I = HA Request Answer Submit If the dc-to-ac converter has a power efficiency of 90 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. HÅ Value Units Request Answer ? Units ?
250 v ,4pole wavw wound DC series motor has 782 conductors on its armature and series field resistant of 0.75 ohm the motor takes a current of 40amp esstimate its speed and its torque developed if it has a flux per pole of 2mWb
The rotor of a 3-phase, 60 Hz, 4-pole induction motor takes 118 kW at 3Hz. The motor has stator copped loss of 2.95 kW, a mechanical loss of 2kW and a stator core loss of 1.7 kW. Solve for the motor efficiency
In a workshop, there is a three-phase asynchronous motor with a power of 6 HP, an efficiency of 85%, and a power factor of 0.8. Find the capacitor capacity required for power factor correction in the workshop. (The capacitors will be connected in a delta configuration.) A new power factor of 0.95 is desired. The nominal voltage in the workshop is given as 0.4 kV. (1 HP = 0.745 kW)
The DC shunt generator with the terminal voltage 325 V, armature drop 9 V and the each brush drop 4 V, then the value of generated emf is n
O c. K = 101.86 and flux =3.33 mWb / pole O d. K = 59.5 and flux = 1.33 mWb/pole In a given DC motor, the output power is 45 HP, and the copper losses are 2.005 KW. If the rotational losses is one tenth of the output power, find the converted power and the efficiency of the motor. Select one: O a. None O b. Prony = 33.57 KW and % efficiency 89.2 % O c. Pcony = 39 KW and % efficiency 75.8 % O d. Pcony = 36.927 KW and % efficiency 86.2 % Ps Ae Pr Ai
A 230v DC series motor takes 30A when giving its rated output at 1400 rpm. It has a field resistance of 0,4 ohms, Calculate the value of the resistance (Ra) of the armature when Eb = 200V. Select the correct response: 0.2 ohms 0.6 ohms 0.8 ohms 0.4 ohms