A separately excited DC motor with supply voltage of 420 V, armature resistance of 0.5 N and K_ =1.8 V-s/rad is controlled by regenerative braking using a DC chopper. Assuming constant average armature current of 320 A during regenerative braking, determine the speed of motor for a duty cycle of 0.65. m 1225 гpm 1629 гpm 1463 гpm 69 гpm

A separately excited DC motor with supply voltage of 420 V, armature resistance of 0.5 N and K_ =1.8 V-s/rad is controlled by regenerative braking using a DC chopper. Assuming constant average armature current of 320 A during regenerative braking, determine the speed of motor for a duty cycle of 0.65. m 1225 гpm 1629 гpm 1463 гpm 69 гpm

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

A 130 V, DC shunt motor drives a constant-torque load at 1100 rpm speed. The armature and field resistances are 0.9 N and 145 N, respectively. The motor draws a line current of 10.7 A at the given load. Answer the following questions. 1- Calculate the resistance that should be added Rodd 2 to the armature circuit to reduce the speed by 85%. Radd Radd Ω 2- Calculate the efficiency of the motor without the added Radd N if the rotational losses is M1 Vt equal to 139.1 W. Ea 3- Calculate the efficiency of the motor with the added Radd Nif the rotational losses is equal to 139.1 W. % 4- Calculate the resistance that must be added to the armature circuit to operate the motor at the holding condition. Radd U
Please the solution must be 100% correct within a period of 10 minutes
A 36 kW, 191 V DC long-shunt motor has an armature, series field and shunt field resistances of 0.04 ohm, 0.04 ohm and 52 ohms, respectively. Find the armature constant if the motor is rotating at 584 rpm and flux density of 0.3 Wb. • 2 decimal places • No need unit Round your answer to 2 decimal places.
1. show complete solutions and choose from the choices
A 3-phase, 8-pole, 100 hp squirrel cage induction motor (SCIM) is connected to a 50Hz 415V (line) supply. The stator copper and iron losses are 5 KW, the rotor copper losses is 4 KW and the friction losses is 1 KW. Calculate motor efficiency a. 67% b. 86% c. 78% d. 73% e. 76% f. 88% 8.65% h. 6996
q1 b
A long shunt compound motor takes a current of 42 A. from a 230 V source. The generator parameters are Ra = 0.1 ohm, Rse = 0.2 ohm and Rsh = 50 ohm. If the friction and windage losses amount to 400 W. Determine the overall efficiency of the machine. we Ase na Vs Ash 1Ish
A 6600V, 6 pole, 3 phase, star connected synchronous motor draws 100 A and works capacitively with a power factor of 0.8. The armature has an effective resistance per phase of 0.35 Ω and a synchronous reactance of 3.5 Ω. Since the mechanical losses of the motor are 3500 W; a-) find the back emf of the motor between phasesb-) Find the efficiency of the engine at this moment.
Asiacell o 9:M 36 26 Asiacell A docs.google.com/f 0 نقطتان )2( for the shunt excited motor running at 1250 rpm, the shunt field current is 0.6A and the armature current is 3.4A, armature resistance is 4 ohm and the supply voltage is 220V, the torque is 5.4, then the motor efficiency is approximately equal to إجابتك صفحة 2 من 3 التالي إرسال کلمات المرور عبر نماذج Go ogle مطلقا. |l>
A 140 V, DC shunt motor drives a constant-torque load at 1100 rpm speed. The armature and field resistances are 0.9 2 and 155 N, respectively. The motor draws a line current of 10.5 A at the given load. Answer the following questions. 1- Calculate the resistance that should be added Radd N to the armature circuit to reduce the speed by 85%. Radd Radd Ω 2- Calculate the efficiency of the motor without the added Radd N if the rotational losses is M1 Vt equal to 147 W. % T Ea 3- Calculate the efficiency of the motor with the added Radd Nif the rotational losses is equal to 147 W. % 4- Calculate the resistance that must be added to the armature circuit to operate the motor at the holding condition. Radd |||
a) What applications / experiments are necessary to find the Rc parameter in the equivalent circuit given in Figure 1? b) Write the value of the Ir 'current given in Figure 1 with a sentence in the idle running test of the 3-phase Asynchronous motor.