Compute the motor speed, Electrical Engineering

Assignment Help:

Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5  and 30 mH, respectively.

(a) When the motor is operating in continuous conduction, find the ac source voltage required to get rated voltage across the motor terminals.

(b) With the ac source voltage obtained in part (a), compute the motor speed corresponding to α = 60° and Ta = 25 N·m assuming continuous conduction.

(c) Let the motor drive a load whose torque is constant and independent of speed. The minimum value of the load torque is 1.2 N·m.

Calculate the inductance that must be added to the armature circuit to get continuous conduction for all operating points, given that ψ = tan-1 (ωLa/Ra) = 1.5 rad, Tan > 0.006, and all points on the Tanmn plane lie to the right of the boundary between continuous and discontinuous conductions.


Related Discussions:- Compute the motor speed

Gis database, GIS database:  In a nutshell, we could say that the GIS ...

GIS database:  In a nutshell, we could say that the GIS technology integrates general database operations (data query and statistical analysis), along with the unique a

Dc chooper, Establish the relationship between duty ratio and output voltag...

Establish the relationship between duty ratio and output voltage

UJT Help, What''s the formula for the VB2'' in a UJT?

What''s the formula for the VB2'' in a UJT?

Calulation of hv/lv ratio to reduce the line loss, kindly send us the formu...

kindly send us the formula and C program for performance improvement of distribution system using HV/LV ratio. REGARDS ANUJ AGARWALA

Shunt capacitors, Shunt Capacitors Line losses owing to poor PF can be...

Shunt Capacitors Line losses owing to poor PF can be decreased through improving the PF. Overall improvement in the operating condition can be brought about through reducing t

Find kfm for the modulator using carsons rule, Q. A commercial FMstation br...

Q. A commercial FMstation broadcasts a signal with 180-kHz bandwidth when |f(t)|max = 2 V. Find kFM for the modulator if the spectral extent of f (t) is 30 kHz, by using Carson's r

H – parameter model, H - Parameter model :- The transistor's equiv...

H - Parameter model :- The transistor's equivalent circuit can be dram using simple approximation by retaining its necessary features. These equivalent circuits will a

Generation and control of electron beam, Illustration the basic working pri...

Illustration the basic working principle, process parameters, economics, safety precautions and applications of plasma Arc Machining process(PAM) Discuss Electron Beam Machining

Electric machinery fundamentals, Ask qu1. If the resistor Radj is adjusted ...

Ask qu1. If the resistor Radj is adjusted to 175O what is the rotational speed of the motor at no-load conditions? 2. Assuming no armature reaction, what is the speed of the motor

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