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To avoid sparking they need to be placed at zero point
"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
yes
the reason for brushes is to makethe motor revolve. The more brushes probably make a more powerful starter motor
Found one DC motor having small sparking,but the commutator is light and dark bar pattern.commutator is round. We 500kw dC motor operted at 500rpm with 480Amp's .The DC motor full load current is 1050Amp's. Why the commutator had small spaerking.
To overcome the sparking at brushes.
brush friction, poor ventillation, excessive sparking caused by high voltage
To avoid sparking they need to be placed at zero point
ring is dirty or brushes arent seated
"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
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.
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.
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.
Hey Dennis==If it is an electric fan, it is probably the brushes in the motor squeeking. Not to worry.GoodluckJoe
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.
yes
Motor brushes ride one the commutator.