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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.

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∙ 14y ago
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Related Questions

Does Equalizer ring minimizes sparking in dc motor?

yes


What is the function of pole shoes of dc motor?

To overcome the sparking at brushes.


Why are brushes staggered in dc motor?

To avoid sparking they need to be placed at zero point


What causes the overheating of commutator in dc motor?

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What causes excessive sparking at the brushes in dc motor?

Excessive sparking at the brushes in a DC motor can be caused by several factors, including improper alignment of the brushes, worn or damaged brushes, and uneven commutator surfaces. Additionally, excessive load on the motor, incorrect brush material, or insufficient brush pressure can also lead to increased sparking. In some cases, electrical issues such as arcing due to high voltage or a short circuit can exacerbate the problem. Addressing these issues typically involves inspecting and maintaining the brushes and commutator.


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.


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.


When you short two wires of 24V dc there is no sparking in telephone lines why?

because it dc not ac


What is a pigtail on a dc generator?

Pigtail is a device to protect the brush from sparking


What are applications of space vector modulation?

Because there's sparking in DC motors, they are inherently less efficient than say AC motors are, The trick with AC motors is that they run primarily at the frequency of their power source. What happens when the power source can change it's frequency and amplitude? The motor can behave as well as any DC motor.


What is a DC shunt motor?

A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.


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