what will happen if dc motor given ac supply

Answer Posted / kaushik

In case of dc motors ,if provided with ac supply will run because in every halfcycle the polarity of field and armature winding will change simultaneously so that torque will be in same direction (regardless wether it is series or shunt motor) but the field winding will be hotter as they are not laminated (as they are designed for working with dc) so excess heat will produce due to eddy current.

Is This Answer Correct ?    0 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

In a voltage-controlled current source A A current booster is never used B The load is always floated C A stiff current source drives the load D The load current equals Isc

1431


What are the specifications for conducting earth leakage test as per IEC standard?

1523


why tertiary winding is used in transformer with diagram?

1792


The sodium vapor lamp is not glows when it is connected a distance of 5 meters above from gearbox, why ?

3209


Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

2481






which connection is safer series or parallel?usually which connection we prefer at home?

8347


what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that

1781


How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?

2465


wish of these transformer uses oil?

1177


why in the three pin plug all 3 pins are cutted ?

1539


Where is servomechanism used?

665


What is the limitation of kirchoffs law?

656


What is the name of transformers oil filteration equipment?

1598


please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com

1375


I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

1378