A dc shunt motor runs at 900 rpm from a 460 V supply when taking an armature current of 25 A. Calculate the speed at which it will run from a 230-V supply when taking an armature current of 15 A. The resistance of the armature circuit is 0.8 Ω. Assume the flux per pole at 230 V to have decreased to 75% of its value at 460 V.

Q: d.c. motor has 774 armature conductors. If In a 4-pole rmature current is 50 Amp. and flux per pole…

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Q: SOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES. The armature of a…

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Q: SOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES. The armature of a…

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Q: A 10 pole lap wound DC armature has a total of 200 conductors each with a current carrying capacity…

A: Given values are - Lap windingNumber of polesP=10Number of conductorsZ=200Current…

Q: A DC motor takes an armature current of 100 A at 440 V. The armature circuit resistance is 0.3 0.…

A: Given a DC motor with, Armature current, Ia=100 A Terminal voltage, V=440 V Armature resistance,…

Q: A DC generator feeds a load of current 20 A and voltage 220 V. Calculate the electrical motive force…

A: Load current IL= 20 A Load Voltage VL = 220 V Resistance of armature Ra= 0.02 Resistance of field…

Q: A 240 V series lift motor has resistance of 0.2 ohm. At the speed of 1800 r.p.m. it takes 40 A. Find…

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Q: An 8-pole lap-connected armature has 40 slots with 12 conductors per slot generating a voltage of…

A: The voltage supplied to the motor by an external power source is known as EMF or electromotive…

Q: .A 230 V dc series motor has Ra=0.22, Rf=0.12. The motor draw 40A at rated speed and 1000 RPM. Find…

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Q: A DC series motor is running with a speed of 800 RPM, while taking a current of 20A from the supply.…

A: Back emf =terminal voltage- voltage drop in armature resistance.  Also back emf is directly…

Q: The factors effecting the speed of dc motor are The flux p and the voltage across the armature The…

A: The factor affecting the speed of the dc motor is as follows; N=V-Ia RaϕN= speed of dc…

Q: A triplex wave-wound armature is used in a 6-pole DC machine. The number of coils is 111 each of…

A: As per our company guidelines, we are supposed to answer only the first 3 sub-parts. Kindly repost…

Q: he iron and stray power losses

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Q: A 230V shunt generator has a field resistance is 23 ohms and an Armature resistance is 1 ohm. It…

A: Shunt generator diagram

Q: V₁= W₂ Caj-b) wo or Caj-6)= Vo so bstitute both into expression for do x = xo cos Wot + V₂ sin wat…

A: Explain the given derivation:

Q: Q- The armature resistance of a permanent magnet dc motor is 0.80. At no load, the motor draws 1.5 A…

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Q: 4. A d.c. generator running at 25 rev/s generates an e.m.f. of 150 V. Determine the percentage…

A: It is given that:

Q: 2. An armature has 268 coils and rotates at 900 rpm. Each brush covers 4 commutator segments. a)…

A: armature has 268 coils rotates at 900rpm each brush covers 4 commutator segments a) to find time for…

Q: SOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES.  The armature of a…

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Q: A 220 V DC Machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 ohm. If the…

A: Given a 220 V DC machine, As a generator: Armature current, Ia=20 A Terminal voltage, V = 200 V…

Q: dc shunt motor

A: Given- DC shunt motor- Current, IL = 30 A Voltage, Vt = 230 V Efficiency= 80 %  Field resistance…

Q: In a given DC motor, the output power is 20 HP, and the rotational losses are 1.1 KW. If the motor…

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Q: SOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES. The armature of a…

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Q: What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

A: It is given that:Number of turns in coil, Current through it,

Q: A six-pole generator develops 250 volts when running at 1800 rpm. The armature has 84 slots and a…

A: Given, P=6Eg=250V1800 rpmZ=84 slotsϕ=1.65×106Lap wounded=A=P=6

Q: The field winding of a d.c. motor is connected to a 110V supply. At a temperature of 18°C, the…

A: Given: Voltage, V=110V At a temperature of 18°C, the current drawn is 0.575 A. T1=18° and I1=0.575A…

Q: An armature has 268 coils and rotates at 900 rpm. Each brush covers 4 commutator segments. a) Find…

A: Part a :-  As the value of R.P.M is 900 . The time taken to for one revolution will be given as :-…

Q: The hysteresis and eddy current losses of a dc generator running at 1000 rpm are 250 W and 200 W,…

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Q: The armature of a two-pole dc machine has 30 slots, each slot has 4 conductors each. during its…

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Gear Motor

A gear motor is a combination of a gearbox and an electric motor. This combination of two systems is used for efficient usage of the motor. It makes a cost-effective solution for high torque, low-speed applications. These motors are used in our household as, garage door openers, alarm clocks. In commercial areas, hospital beds, cranes.