Illustrate and compare speed current and torque current characteristics of a compound wound d.c. motor with that of series and shunt motor.

QUESTION 2 a) Draw the equivalent circuit and torque-speed characteristic curve for a series DC motor. b) Briefly explain the induced torque occurs in a series DC motor. e) A 20-hp 240-V 76-A 900 rimin series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 2, and its field resistance is 0.06 2. The magnetization curve expressed in terms of magnetomotive force versus Ex at 900 rimin is given by the following table: Table Q2 c): The magnetomotive force table for a de motor taken at 900r'min E. V 95 150 188 212 229 243 F.A tuus 1000 1500 2000 2500 500 3000 If the motor running at 33 percent of the full-koad armature current, determine: ) The motor's power converted from electrical to mechanical form, Prene i) The motor's torque, Tnit ii) The motor's speed, n

A 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The resistances of the armature and shunt field are 0.25 ohms and 100 ohms respectively. Determine the percentage reduction in field flux in order to obtain a speed of 1650 r.p.m. when armature current drawn is 40 A

A 20-hp, 110 V DC shunt motor has an efficiency of 88% and the exciting current of 4 amperes and an armature resistance of 0.04 ohm. What starting resistance is required for full-load torque?

Draw the circuit please.

I have less to submit please help me in this problem.

Consider a shunt DC motor with an armature resistance RA=0.2 ohm and terminal voltage VT = 160 V. The motor rated speed is 1800 RPM. The total field resistance 240 ohm. Assume No armature reaction in this machine. The variation of the armature terminal voltage as a function of the field current is measured under no-load conditions and shown below:

A 240 V d.c. shunt motor with an armature resistance of 0.5 ohm has a full load current of 40 A. Find tge ratio of the stalling torque to the full load torque when a resistance of 1 ohm is connected in series with the armature ?

Determine the torque established by the armature of a four-pole d.c motor having 774 conductors, two paths in parallel, 24 milli-webers of pole-flux and the armature current is 50 amps.

A 10 kW, 250 V Shunt motor has an armature resistance of 0.5 ohm and a field resistance of 200 ohm. At no load and rated voltage, the speed is 1200 rpm and the armature current is 3 A. At full load and rated voltage, the line current is 47 A and because of armature reaction, the flux is 4 % less than it no load value. a.) What is the full load speed? b.) What is the developed torque at full load?