Compute the minimum line current for the motor, Electrical Engineering

Assignment Help:

A three-phase, wye-connected, four-pole, 400- V, 60-Hz, 15-hp synchronous motor has a synchronous reactance of 3  per phase and negligible armature resistance. The data for its no-load magnetization curve follow:

Field current, A:

2  3.5  4.4  6  8  10  12

Line-to-neutral voltage, V:

100  175  200  232  260  280  295

(a) When the motor operates at full load at 0.8 leading power factor, determine the power angle and the ?eld current.Neglect all losses.

(b) Compute the minimum line current for the motor operating at full load and the corresponding ?eld current.

(c) When themotor runswith an excitation of 10 A while taking an armature current of 25 A, calculate the power developed and the power
factor.

(d) If the excitation is adjusted such that the magnitudes of the excitation voltage and the terminal voltage are equal, and if the motor is taking 20 A, ?nd the torque developed.


Related Discussions:- Compute the minimum line current for the motor

Explain polarization, Explain Polarization. Polarization: A dielectric ...

Explain Polarization. Polarization: A dielectric has molecules the atomic nuclei of that are effectively fixed, related to each other. In absence of any external field all the

Dc motors, costruction and working of dc motor

costruction and working of dc motor

What the voltage gains in the fet amplifier, Q. What the voltage gains in t...

Q. What the voltage gains in the FET amplifier? For common source  Voltage gain=V o /V i = - µRd / Rd + rd where µ is the amplification factor,Rd the drain resistance a

Zener diode, how does a zener diode works.

how does a zener diode works.

Show cmos logic families, Both DTL and TTL are based on the saturating BJT ...

Both DTL and TTL are based on the saturating BJT inverter. The transistor acts as a switch that connects or disconnects the collector and emitter. The switch is closed when suffici

Explain the discovery of neutron. mention its properties, Explain the disco...

Explain the discovery of neutron. Mention its properties. Discovery of Neutron: The existence of neutron was first predicted by Rutherford in the year 1920. But it was discov

2365-305 Electrical systems design TASK A, Hi, I need help with this assign...

Hi, I need help with this assignment. Is this assignment something you can help me with?

Op amps, calculating different op amps

calculating different op amps

Explain magnetostriction, Explain Magnetostriction. Magnetostriction: I...

Explain Magnetostriction. Magnetostriction: If ferromagnetic materials are magnetized a small change of dimensions of the material obtains place. There is a small extension alo

RC coupled transistor amplifier., why we plot graph to find bandwidth is dr...

why we plot graph to find bandwidth is drawn b/w av/avmax v/s frequency not av v/s frequency?

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