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

Explain practical digital to analog converters, Explain Practical Digital t...

Explain Practical Digital to Analog Converters? In several DSP applications, we must reconstruct an analog signal after the digital processing stage. This is completed using a

Transistor hybrid model, Transistor Hybrid model:- Make Use of h - par...

Transistor Hybrid model:- Make Use of h - parameters to explain a transistor have the following benefits. a)      h - Parameters are real numbers that are up to radio frequ

Hall effect, Describe hall effect?also describe it''s mathematical analysis...

Describe hall effect?also describe it''s mathematical analysis and it''s properties

Show a schematic diagram of the seven- segment decoder, Q. Digital watches ...

Q. Digital watches display time by turning on a certain combination of the seven-segment display device. (a) Show a typical seven-segment display. (b) Develop a truth table f

Followings are the disadvantages of plc - stepper motor , Followings are th...

Followings are the Disadvantages of PLC a.Too much  work  required in  connecting wires. b.Difficulty with changes or replacements. c.Difficulty in finding  errors  requi

Explain repetitive coverage of satellite, Q. Explain Repetitive coverage of...

Q. Explain Repetitive coverage of satellite? Due to repeated passes of the satellite over the same reach, data is repeatedly acquired. Therefore, comparisons of a dynamic pheno

Calculate the fraction of particles - top plate, Consider a colloidal suspe...

Consider a colloidal suspension of latex particles confined between two plates. The plates are charged, so there is an electric potential difference V between them (as shown). The

Describe watch dog timer and reaction timer, a. Given a timer with a termin...

a. Given a timer with a terminal count and a clock frequency of 10 MHz measure the following: (i) Range & Resolution (ii) Terminal count values needed to measure 3ms interval

Simulate a diode application circuit using multisim ewb, a. Simulate a diod...

a. Simulate a diode application circuit using Multisim EWB.  Compare calculated and simulated results Each student must choose one of the following circuits from question 1 (Ref

Explain state-variable techniques, Q. Explain state-variable techniques? ...

Q. Explain state-variable techniques? The matrix formulations associated with state-variable techniques have largely replaced the block-diagram formulations. Computer software

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