A series motor, working on 500 V d.c. supply, runs at a speed of 1000 r.p.m when load current is 120 A. Resistance of motor is .15 ohms of which 0.04 ohms is the resistance of field. Assuming an unsaturated field, calculate the speed of motor when the torque is ½ of the full load torque and the field winding is connected in parallel with diverter resistance of 0.08 ohm

Q: a 220V shunt generator has an armature resistance of 0.02ohms and a shunt field resistance of 44…

A: Developed power in armature = power input - iron and friction losses…

Q: A 240 V shunt motor has an armature current of 15 A when running at 800 rpm against full-load…

A: In this question we need to find a What resistance must be inserted in series with the armature to…

Q: A shunt motor was tested by means of a pony brake having a length arm of 4 ft and a tare weight of…

A: The given data's are, Length of arm is 4 ft, Tare weigh is 6.3 lbs, Input voltage is Vin=250 V,…

Q: When on normal full-load, a 500 V, d.c. shunt motor runs at 800 r.p.m. and takes an armature current…

A:

Q: torque available at the shaft of DC series motor is less than the torque developed in the armature…

A: When the armature power is applied to rotate the shaft of the DC series motor, some power loss…

Q: (c) A dc series motor, connected to a 440 V supply, runs at 500 rpm when taking a current of 40 A.…

A: In this question, DC series motor,  Find the value of external resistance R if speed reduced to…

Q: A 4 pole, 250 V, DC shunt motor has a lap connected armature with 960 conductors. The flux per pole…

A: In this question,  A 4 pole, 250 V, DC shunt motor LAP connected armature winding, Number of…

Q: A 140 V, DC separately excited motor drives a constant-torque load at 1000 rpm speed. The armature…

A: hi there, as per the guidelines, we answer first 3 sub parts of a query, please post Q4 as a…

Q: 8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots,…

A: The solution can be achieved as follows.

Q: Q2 : A series motor takes a current of 50 A at 440 v when running at 500 rpm . The resistance of…

A: A DC machine is classified in two types. DC motors DC generators Above question is based on DC…

Q: A 125-kW, 250-V, 1800-rev/min, cumulative compound DC Generator has the following winding…

A:

Q: A dc series motor takes 40 A at 220 V and runs at 800 rpm. If the armature and field resistance are…

A: Armature torque is given by, Ta=9.55EaIaN N-m Calculating Eb , Eb=V-Ia(Ra+Rse)=220-(0.2+0.1)Eb=208 V…

Q: resistance of 0.15 Q. Two field coils are connected in parallel and used to drive a load with the…

A:

Q: A 40-HP, 230-V., 8-pole, 25 Hz three-phase induction motor is running at 355 rpm at rated load. The…

A:

Q: Q8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots,…

A:

Q: Q1 A 220 V d.c. shunt motor having an armature resistance of o.25 carries an armature current of 50…

A:

Q: A de shunt motor 40 V at the load 6A, rotating 700 r.p.m at the torque 4 N.m. Find the efficiency of…

A:

Q: 500HP, 720rpm synchronous motor 3980V is connected with a 3-phase zone and excitation is 25A sample…

A:

Q: A 250-V shunt motor runs at 1500rpm at no-load and takes 8A. The total armature and shunt field…

A: To calculate tha speed of shunt motor when it is loaded  Assuming flux is constant

Q: A shunt dc generator with an armature resistance of 0.4 and a field resistance of 100 generates a…

A:

Q: 250 V D. C shunt motor takes 41 A at full load, Resistances of motor armature and shunt field…

A:

Q: Q/ A de series motor on load operating at 250 V dc mains draws 25 A and runs at 1200 rpm. Armature…

A: According to the question, we have to determine (a) The speed of the motor with the shunted armature…

Q: A 500 V, lap wound d.c. A shunt motor has 90 slots and each has 8 conductors. When the motor…

A:

Q: ad current corresnond Q2// A D.C series motor takes 40 A at 220 V and runs at 800 r.p.m, the…

A:

Q: Q5- A)- Select the correct answer for the alternatives given 1- Wave windings are used in d.c…

A: As per guidelines given to us we can only provide the solution of first three subpart in multi part…

Q: Q2: The armature and field resistance of a 220 V DC series motor is 0.15 ohm and 0.1 ohm…

A: Consider the KVL equation for the circuit. -V+E1+IaRse+Rf=0E1=V-IaRse+RfE1=220-300.15+0.1E1=212.5 V

Q: A 6-pole, 500-V. wave-connected shunt motor has 1200 armature conductors and useful flux/pole of 20…

A: First calculate armature current and then find back emf. Now using back emf find speed of the motor.…

Q: (use 2-decimal digits for solutions) A 6-pole, 500-V. wave-connected shunt motor has 1200 armature…

A:

Q: The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots, each…

A: Here, we have an armature winding. The slots and conductors are defined. The current taken by the…

Q: A 2-pole series motor runs at 707 rpm, when taking 100-A at 85-V with the coils in series. What…

A: Number of poles P=2Voltage V=85 vArmature resistance Ra=0.04 ΩResistance of each coil Rcoil=0.03…

Q: 3- A series-resistance of series motor is 1 ohm. In driving a certain load at 1200 rpm, the current…

A:

Q: (use 2-decimal digits for solution) A 10-hp (7.46 kW), 250-V. shunt motor takes a line current of 5…

A: In this question,   We need to calculate the efficiency when delivering full load output? And At…

Q: Q4 A 500-V, 37.3 Kw, 1000 r.p.m. d.c. shunt motor has on full- load an efficiency of 90 percent. The…

A: In this question, We need to determine the full load line current?, shaft torque?  Torque = power /w…

Q: 1.4 A DC generator has terminal voltage of 250 V and an induced voltage of 262 V when the generator…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A 4-pole series motor has 800 lap connected armature conductors. At a certain load, the flux per…

A: Given DC series motor with Number of poles P=4Armature conductors Z=800Flux per pole ϕ=60 mWbTotal…

Q: A 155 V, DC separately excited motor drives a constant-torque load at 1400 rpm speed. The armature…

A: Given V=155 V Constant torque load N1= 1400 rpm Ia=0.7 ohm If= 150 ohm IL=10 A Vf=103 V

Q: -The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots,…

A:

Q: A 240-V series motor has an armature resistanceof 0.42Ω  and a series-field resistance of0.18Ω .…

A:

Q: A 4-pole series motor has 800 lap connected armature conductors. At a certain load, the flux per…

A: Motor: It is an electromechanical device, that can convert the electrical power into mechanical…

Q: A 6-pole, 500-V wave-connected shunt motor has 1200 armature conductors and useful flux/pole of 20…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: The armature current of a series motor is 60 A when on full load. If the load is adjusted so that…

A:

Q: Give answer as soon as possible A 200 V dc shunt motor runs at no-load speed of 1000 rpm and takes…

A: Current: It is the time rate of the change of the charges. It is also known as the flow of the…

Q: The armature winding resistance of a long shunt connected DC generator is 0.4ohm, the resistances of…

A: D.C Machine is nothing but synchronous machine plus commutator.  D.C generator= synchronous…

Q: Q:A8 pole long shunt DC compound generator ruining at 1200 r.pm , supplies a load of 0,255 KA at 230…

A: The new speed is same as initial speed since the percentage change in flux and genrator emf is same…

Q: Q4) What is the effect in series motor if you assume V = Eb , with low resistance fielding winding ?…

A: If the back emf Eb becomes equal to the applied voltage V, the the armature current Ia will become…

Q: The armature current of a series motor is 60 A when on full-load. If the load is adjusted to that…

A:

Q: Q8-The armature winding of a 4-pole, 250 V d.c. shunt motor is lap connected. There are 120 slots,…

A:

Q: Q4 A series motor takes 20 A at 400 V, and run at 250 rpm. The armature, and field resistances are…

A:

Q: current of 110 A at 480 V. The armature circuit resistance is 0.2 Ω with field resistance of 120…

A:

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.