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Q: What causes excessive sparking at the brushes in dc motor?
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What is the function of pole shoes of dc motor?

To overcome the sparking at brushes.


What causes the overheating of commutator in dc motor?

brush friction, poor ventillation, excessive sparking caused by high voltage


Why are brushes staggered in dc motor?

To avoid sparking they need to be placed at zero point


What are the reasons of sparking on the slip ring of a slip ring motor?

ring is dirty or brushes arent seated


Your church organ bellows is powered by a repulsion start-induction motor It is arching quite a bit and does not start the first or sometimes the second time Could it be brushes or a dirty comutator?

"Induction" motors imply AC power Most AC motors do not have brushes or commutator If your motor does have brushes, a lot of sparking where the brushes meet the comutator is a good indication that it needs to be cleaned and/or "cutdown". If your motor does not have brushes, then you have more serious trouble. Need more details


What is Nikola Tesla generator?

While in college Nikola Tesla claimed it should be possible to operate an electrical motor without sparking brushes. He was told by the professor that such a motor would require perpetual motion and was therefore impossible. In the 1880's he patented the alternating current generator, motor, and transformer.


Can a DC motor work on an AC supply?

There is a motor that is known as Universal motor which works on DC or AC .You might find one in a drilling machine or a domestic grinding machine .But there is a disadvantage ,in that there will be sparking at the commutator between the brushes and the commutator segments due to a shift in the magnetic neutral axis while on AC operation.


What causes sparking?

It depends on the type of sparking/arcing. If you mean in a DC or series-wound motor, it is caused by the making and breaking of the commutator segments against the motor brushes.If you mean under a car, then it could mean that the muffler is dragging the ground.If you mean in a CRT television, then it is likely problems with the flyback transformer.


What causes a squeaking sound when you turn the fan on in a Toyota Corolla?

Hey Dennis==If it is an electric fan, it is probably the brushes in the motor squeeking. Not to worry.GoodluckJoe


What are two reasons for motor failure?

Assuming you mean electric motors, the causes for failure include seized bearings and worn brushes. If the bearings or bushings are seized, the motor may fail. Most electric fans have thermal fuses, so if the motor seizes and overheats, the fuse blows. If the brushes are worn, then the motor is no receiving electricity and thus cannot turn.


Does Equalizer ring minimizes sparking in dc motor?

yes


The part of the armature that the brushes ride on is called the?

Motor brushes ride one the commutator.