CLASSIFICATION OF DC MACHINES part2

PROBLEMS

1. The armature of a 4 pole wave wound DC shunt generator has 144 slots and 3 conductors per slot. If armature is rotated with a speed of 1200 rpm in a field of 0.025 wb/pole, calculate the EMF generated.

2. An 8 pole DC generator has 960 conductors and a flux/pole of 20 m wb. Calculate the EMF generated when running at 500 rpm for (i) A lap connected armature winding and (ii) A wave connected armature winding.

3. An 8 pole DC shunt generator with 778 conductors wave connected and running at 500 rpm supplies a load of 12.5 .0 resistance at terminal voltage of 250 V, the armature resistance is 0.24.0 and the field resistance is 250 .0. Find the armature current, induced emf and <l/pole.

4. A 4 pole long shunt lap wound generator supplies 25 kW at a terminal voltage of 500 V. The armature resistance is 0.03 .0. Series field resistance is 0.04.0 and shunt field resistance is 200 .0. The brush drop may be taken as 1.0 V. Determine the emf generated. Calculate also the number of conductors if the speed is 1200 rpm and <l/pole is 0.02 wb. Neglect armature reaction.

Incoming search terms:

• an 8 pole dc shunt generator has 778 wave connected armature conductors runing at 500 rpm supplies a load of 12 5 ohm resistance at the terminal voltage of 250v the armature resistance is 0 24 ohm and the field resistance is 250ohm find the armature curre
• an 8 pole dc shunt generator with 778 wave
• An 8 pole lap wound armature has 1200 conductor and a flux/pole of 0 03wb determine the emf generated when running at 500 rev/m
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• a 4-pole long shunt lap wound generator supplies 25kw at a terminal voltage of 500kv the armature resistance is 0 03 series field resistance is 04 and the field resistance is 200 the brush drop may be taken as 1v determine the emf generated calculate also
• induced Emf in a shunt wound generator
• A 230v compound generator has armature series field and shunt field resistance of 0 4 ohms 0 24 ohms and 1 25 ohms respectivily if this generator supplies 10kw at rated voltage find the emf generated in the armature when the machine is connected (a) long
• brush drop in long shunt lap wound
• an 8 pole dv shunt generator has 778 wave connected armature
• An 8 pole lap wound armature has 1200 conductor and a flux/pole of 0 03 wb determine the emf generated when running at 500 rev/ms solution
• resistance of shunt field winding is200 ohm
• an 8 poles dc generator has 960 conductors and a flux/pole of 20mwb calculate the emf generated when running at 500rpm for lap connected amarture winding
• An 8-pole DC series generator with 778 sinple wave wound armature conductors running at 100rpm supplies a load of 20ohms
• An 8pole lap wound armature has 1200 conductors and a flux per pole of 0 03 Wb Determine the generated emf when running at 500 rpm
• an eightpole wound generator has 980 conductors and a slot per pole of 0 03 wb calculate the emf generated when running at 500 rpm?
• an 8 pole dc shunt generator with 778 waves connected armature conductors and running at 500rpm supplies a load of 12 5 ohms resistance at a terminal voltage of 50V the armature resistance of 24ohms and the field resistance is 250 ohms find the flux per p
• An 8 pole dc shunt generator with 778 wave connected armature conductors and running at 500 rev/min supplies a load of 12 5 ohms resistance at a voltage of 50v The armature and field resistance are 0 24 and 250 ohms respectively calculate 1) The armature
• A 4 pole lap connected dv machine has 960 conductors Determine the generated emf
• a 4 pole long shunt lap wound generator supplies 25kv at a terminal voltage of 500v the armature resistance is 0 03 series field 0 04 shunt field 200 the brush drop may be taken as 1v determine the emf generated calculate also the number of conductors is
• a 4 pole long shunt lap wound generator supplies 25kw
• a 4pole wave wound dc armature has a bore diameterof 71 12cm it has 520 conductors and the ratio of pole arc/pole pitch is 0 63 if the armature is running at 720rpm and the flux densityin air gap is 1 6wb/m^2 calculate the emf generated in the armature ef
• a 8 pole shunt genetor
• a six pole armature is wound with 500 conductors and driven at 1000rev/min with the flush being 30mwb the current in each conductor is 66A calculate the total current the e m f and the electrical power generated if the conductors are connected lap
• an 8 pole dc generator 960 armature
• an 8 pole dc generator with 778 wave connected armature conductors and running at 500rpm
• An 8 pole DC shunt generator with 778 conductors wave connected and running at 500 rpm supplies a load of 12 5 0 resistance at terminal voltage of 250 V the armature resistance is 0 24 0 and the field resistance is 250 0 Find the armature current induced
• 8 – pole wave wound dc shunt generator with 778 conductors while running at 500 rpm supplies 12 5 Ώ resistive load at 250 V The armature resistance is 0 24 Ώ and the field resistance is 250 Ώ Calculate the flux per pole
• six pole dc machin has flux per pole 30mwb