Determine the electromagnetic power and torque

Assignment Help Electrical Engineering

Reference no: EM13291373

A 15hp, 440V, 1250rpm separately excited dc motor draws 30A atrated load. The no-load current is 5A. The armature resistance is0.8ohms. Consider that the rotational losses(core+mechanical) areproportional to the speed. The rated field losses are equal to500W. The field current is kept constant. The machine is notsaturated. For a 220V armature voltage, the recorded armaturecurrent is 25A. Find
a) the motor speed
b) the electromagnetic power and torque
c) the shaft power and torque.

Reference no: EM13291373

Questions Cloud

Explain the density of a metal and length of the unit cell : Many metals pack in cubic unit cells. The density of a metal and length of the unit cell can be used to determine the type for packing. For example, gold has a density of 19.32 g/cm3 and a unit cell side length a of 4.08 Å. (1 Å = 1. 10-8 cm.)

What is likely to happen over time : The CEO disagrees, on the grounds that even though projects have different risks, the WACC used to evaluate each project should be the same because the company obtains capital for all projects from the same sources. If the CEO's position is accept..

Design a combinational circuit with three inputs x-y and z : Design a combinational circuit with three inputs x, y, and z andthree ouputs A, B, and C. when binary input is 0,1,2,or 3, the binary output is, one greater than the input. when the binary input4,5,6,or 7, the binary output is one less than the in..

Find the output voltage when rated load with power factor : An 8 pole, three phase 50kVA, 220V, Y connected synchronousgenerator has a synchronous reactance of 4.8ohms per phase andoperates in stand-alone. Neglect all loses. The field voltage isadjusted to give rated voltage across the output terminal at n..

Determine the electromagnetic power and torque : A 15hp, 440V, 1250rpm separately excited dc motor draws 30A atrated load. The no-load current is 5A. The armature resistance is0.8ohms. Consider that the rotational losses(core+mechanical) areproportional to the speed.

Design an lc circuit to protect the tungsten filament : Design an LC circuit to protect the tungsten filament of an ordinary 75-Watt incandescent light bulb from over the current-transients greater than 50% of the normal operating current at the moment of turn-on

Explain expect the catalyst to appear in the rate law : A and B are two species which react in the presence of an acid catalyst. Would you expect the catalyst to appear in the rate law

Calculate the temperature of the hot filament : A certain lightbulb has a tungsten filament with a resistance of 18.0 when cold and 138 when hot. Find the temperature of the hot filament

Determine the rc product that would give a rise time : Let h(t)= (1/(R*C))*(e^(1/(R*C)))*u(t) be the impulse of an RC circuit and x(t)= u(t) an input to that circuit. 1. Find X(jω) and H(jω), which are the Fourier transforms of x(t) and h(t). 2. Form the product Y(jω)=H(jω)*X(jω) the Fourier transform of..

User Account

All Pages