Dynamo Laboratory Manual, for Colleges And Technical Schools
Dynamo Laboratory Manual, for Colleges And Technical Schools
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In our eReader you can find the full English version of the book. Read Dynamo Laboratory Manual, for Colleges And Technical Schools Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Dynamo Laboratory Manual, for Colleges And Technical Schools
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Theory. The theory of commutation is discussed in detail in the text books on dynamo machinery, and it is considered neces- sary here only to make a brief statement of the causes of faulty commutation.
1 . The self-induction of the armature sections may be so great that the current in a section does not have time to decrease to zero, reverse and rise to full value during the interval that the brush short-circuits the section, so that sparking occurs when this local short circuit is broken.
2. I...f the brushes are displaced from the neutral axis, they will short-circuit coils in which there is a considerable electromotive force induced by rotation, thus causing local currents and sparking.
3. Roughness of the commutator or mechanical defects in the brush rigging may cause chattering of the brushes and sparking.
4. When the armature carries a large current, the cross mag- netizing effect of this current distorts the magnetic field greatly, so that the brushes are no longer situated in the neutral axis, and sparking results as explained in (2) above.
What to read after Dynamo Laboratory Manual, for Colleges And Technical Schools?
You can find similar books in the "Read Also" column, or choose other free books by William S William Suddards Franklin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Theory. The theory of commutation is discussed in detail in the text books on dynamo machinery, and it is considered neces- sary here only to make a brief statement of the causes of faulty commutation.
1 . The self-induction of the armature sections may be so great that the current in a section does not have time to decrease to zero, reverse and rise to full value during the interval that the brush short-circuits the section, so that sparking occurs when this local short circuit is broken.
2. I...f the brushes are displaced from the neutral axis, they will short-circuit coils in which there is a considerable electromotive force induced by rotation, thus causing local currents and sparking.
3. Roughness of the commutator or mechanical defects in the brush rigging may cause chattering of the brushes and sparking.
4. When the armature carries a large current, the cross mag- netizing effect of this current distorts the magnetic field greatly, so that the brushes are no longer situated in the neutral axis, and sparking results as explained in (2) above.
What to read after Dynamo Laboratory Manual, for Colleges And Technical Schools?
You can find similar books in the "Read Also" column, or choose other free books by William S William Suddards Franklin to read onlineMoreLess
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