Electrical Engineering ⇒ Topic : Mechanical (or friction) losses.
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Peter
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Mechanical (or friction) losses. When a machine is running, there are various frictional forces to be overcome, each of which requires a continuous expenditure of energy and results in heating the rubbed parts. There is friction loss in the machine bearings,at the surface of the commutator due to the rubbing of the brushes, and in the armature core due to its fanning action. These losses depend upon the speed but are independent of the load on the machine. They are difficult to estimate by direct calculation but may be found by measurement. | |
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