assuming n=m=1 A 230+m V, series DC motor has a field winding of 35+m turns per...

assuming n=m=1

A 230+m V, series DC motor has a field winding of 35+m turns per pole, Its armature resistance is 0.09+.01*m ohm and field resistance is 0.06+0.01*m ohm. The magnetization curve expressed in terms of magneto motive force verses EA at 850+n rpm is given below by the following table. Rated current is 70+m A. Rotational loss is 50+m Watt. Find Motor’s torque, Speed and output power at 90% of full load armature current.

EA V	95	150	188	212	229	243
ℒ, A. turn	500	1000	1500	2000	2500	3000

Solutions

Expert Solution

Manojponduru answered 1 month ago

Next > < Previous

Related Solutions

Problem 5) A long shunt 600 V, 1200-rpm DC motor has a series field winding resistance...

Problem 5) A long shunt 600 V, 1200-rpm DC motor has a series field winding resistance of 0.05 Ω, a shunt field winding resistance of 200 Ω, and an armature resistance of 0.1 Ω. The machine is connected to 600 V DC source. The rotational loss is 3.2 kW. If the machine draws a 100 A from the supply, calculate a. Back EMF b. Determine the machine’s converted power (or developed power) and its efficiency. c. Determine the speed regulation...

A 230 V, 250 rpm, 100 A separately excited dc motor has an armature resistance of...

A 230 V, 250 rpm, 100 A separately excited dc motor has an armature resistance of 0.5 Ω. The motor is connected to 230 V dc supply and rated dc voltage is applied the field winding. It is driving a load whose torque-speed characteristic is given by TL = 500 − 10ω where ω is the speed in rad/sec and TL is the load torque in N-m. Find (a) the steady state speed at which the motor will drive the...

A 230 V, 500 rpm, 100 A separately- excited dc motor has an armature resistance of...

A 230 V, 500 rpm, 100 A separately- excited dc motor has an armature resistance of 0.1 ohms. The motor is driving, under rated conditions, a load whose torque is constant and independent of speed. The speeds below the rated speed are obtained with armature voltage control (with full field) and the speeds above the rated speed are obtained by field control (with rated armature voltage). What motor terminal voltage is needed to run it at 400 rpm? By what...

A 120+m -V , 2400+n-rpm shunt DC motor has a armature resistance 0.4+0.1*m ohm and a...

A 120+m -V , 2400+n-rpm shunt DC motor has a armature resistance 0.4+0.1*m ohm and a shunt field resistance of 160+m Ohm . The motor operates at its rated speed with full load which takes 15+m Amp. A small of current of 2+.1*m A at no load due to rotational loses. Assume that rotational loss is proportional to the speed. Find Field current at no load Armature current at no load Rotational loss at no load Armature current at Full...

A 400 V dc shunt motor has a rated armature current of 76 A at a...

A 400 V dc shunt motor has a rated armature current of 76 A at a speed of 1000 rpm. The armature resistance of the motor is 0.4ohm, the field resistance is 100 ohm, and the rotational losses are 0.9 kW. The load of the motor is bidirectional. Calculate the following: (a) No-load speed of the motor. (b) Motor speed, where the armature current is 60 A during regenerative braking. (c) Developed torque during regenerative braking. (d) Back electromotive force,...

: A dc motor develops 55 N-m torque at a speed of 600 rad/s when 12...

: A dc motor develops 55 N-m torque at a speed of 600 rad/s when 12 volts are applied. It stalls out at this voltage with 100 N- m of torque. If the inertia and damping of the armature are 7 kg-m2 and 3 N-m -s/rad, respectively, find the transfer function, G(s) = θL(s)/Ea(s), of this motor if it drives an inertia load of 105 kg-m2 through a gear train, as shown in the figure 11.

1. Descriptive questions v. In a DC motor, what is a commutator? (1 point) vi. What is asolenoid? (1...

1. Descriptive questions v. In a DC motor, what is a commutator? (1 point) vi. What is asolenoid? (1 point) vii. What is the difference between ahydraulic actuator and a pneumatic actuator?(1 point) viii. Briefly describe the three phases of the analog-to-digital conversion process?

A 440 V 4-pole 3 phase 50 Hz slip ring induction motor has its stator winding...

A 440 V 4-pole 3 phase 50 Hz slip ring induction motor has its stator winding mesh connected and its rotor winding star connected. The standstill voltage measured between slip rings with the rotor open –circuited is 218 V. the stator resistance per phase is 0.6Ω and the stator reactance per phase is 3Ω. The rotor resistance per phase is 0.05Ω and the rotor reactance per phase is 0.25Ω. Calculate the maximum torque and the slip at which it occurs....

1. An EM wave has a maximum electric field of 250 V / m. Determine the...

1. An EM wave has a maximum electric field of 250 V / m. Determine the average intensity of the wave. a. 120 W/m^2 b. 0.66 W/m^2 c. 170 W/m^2 d. 83 W/m^2 e. 0.89 W/m^2 2. The various colors of visible light differ in: a. frequency and wavelength b. frequency and its speed in a vacuum c. only in wavelength d. only in frequency e. its speed in a vacuum 3. Determine which of the following types of waves...

A 5-kW, 250-V shunt motor has an armature resistance of 0.1 ? and a field-circuit resistance...

A 5-kW, 250-V shunt motor has an armature resistance of 0.1 ? and a field-circuit resistance of 80 ?. When the motor is operating at rated voltage, the speed is observed to be 1200 r/min when the machine is loaded such that the armature current is 30 A. In order to protect both the motor and the dc supply under starting conditions, an external resistance will be connected in series with the armature winding (with the field winding remaining directly...

Subjects