Find the initial and final values of the armature current, Electrical Engineering

Assignment Help:

Q. A 7.5-hp, 250-V, 1800-r/min shuntmotor, having a full-load line current of 26 A, is started with a four-point starter. The resistance of the armature circuit, including the interpole winding, is 0.48 ; and the resistance of the shunt-field circuit, including the field rheostat, is 350 . The resistances of the steps in the starting resistor are 2.24, 1.47, 0.95, 0.62, 0.40, and 0.26 , in the order in which they are successively cut out.When the armature current is dropped to its rated value, the starting box is switched to the next point, thus eliminating a step in the starting resistance.

Neglecting field-current changes, armature reaction, and armature inductance, find the initial and final values of the armature current and speed corresponding to each step.


Related Discussions:- Find the initial and final values of the armature current

Design a circuit for indicate the connection of a battery, You are asked to...

You are asked to design a circuit that indicates if a 12 V battery has been connected the correct way around to two terminals, A and B. To do this, you have chosen to use a special

Referring to figure evaluate current in circuit, Referring to Figure, let b...

Referring to Figure, let boxes 2, 3, and 5 consist of a 0.2-H inductor, a 5- resistor, and a 0.1-F capacitor, respectively. Given A = 5, and v 1 = 10 sin 10t, i 2 = 5 sin 10t ,

Write a report on various types of diodes, a. write a report (at least  2 p...

a. write a report (at least  2 pages ) on various types of diodes( Show and explain  the theory, symbol, circuit, characteristics, data sheets and applications circuits using the d

Modify the jk flip-flop to operate like the t flip-flop, Q. A JK flip-flop ...

Q. A JK flip-flop is shown in Figure (a). (a) Modify it to operate like the D flip-flop of Figure (b). (b) Modify the JK flip-flop to operate like the T flip-flop of Figure (

Math, How you write this number in letters. 20,000.000.000

How you write this number in letters. 20,000.000.000

Capacitive var, how over compensation by capacitive var rises voltage in a ...

how over compensation by capacitive var rises voltage in a circuit?

What is interrupt service routine, What is interrupt service routine? I...

What is interrupt service routine? Interrupt means to break the sequence of operation. Whereas the CPU is executing a program an interrupt breaks the normal sequence of impleme

Principles for implementation of strategy in organization, Principles for I...

Principles for Implementation of Strategy in an Organization Organization required focusing on five principles for the successful implementation of strategy. Organizations wil

Lossy transmission line, Q. The model of an elemental length of a lossy tra...

Q. The model of an elemental length of a lossy transmission line is shown in Figure (a), along with its parameters, where R is series resistance per unit length, L is serie

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd