The Practical Testing of Dynamos And Motors
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In our eReader you can find the full English version of the book. Read The Practical Testing of Dynamos And Motors 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 The Practical Testing of Dynamos And Motors
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51, which represents a curve obtained from a 2-pole Crompton dynamo.
By drawing a horizontal line A B through the point of the curve corresponding to no-load voltage, the drop of voltage for any current may be measured downwards from this horizontal line.
In order to separate the drop in volts due to the resistance of the conductors from the drop due to the magnetic reaction of the armature current, it is necessary to draw the line A C as described on pages 51 and 52.
In the case of the dynamo ...for which Fig. 14 was drawn the resistance between the terminals after a run was found to be *18 ohm. Accordingly, with 20 amperes the drop due to the resistance of the conductors was 3'6 volts, as indicated by the length of b c, measured downwards on the ordinate corresponding to 20 amperes.
Any ordinate now drawn from the horizontal line A B to the curve will be divided into two parts where it is cut by the line A C. The length of the upper portion gives the electrical or ohmic drop, the length of the lower part represents the drop due to magnetic reactions alone.
What to read after The Practical Testing of Dynamos And Motors?
You can find similar books in the "Read Also" column, or choose other free books by Charles Frederick Smith to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
51, which represents a curve obtained from a 2-pole Crompton dynamo.
By drawing a horizontal line A B through the point of the curve corresponding to no-load voltage, the drop of voltage for any current may be measured downwards from this horizontal line.
In order to separate the drop in volts due to the resistance of the conductors from the drop due to the magnetic reaction of the armature current, it is necessary to draw the line A C as described on pages 51 and 52.
In the case of the dynamo ...for which Fig. 14 was drawn the resistance between the terminals after a run was found to be *18 ohm. Accordingly, with 20 amperes the drop due to the resistance of the conductors was 3'6 volts, as indicated by the length of b c, measured downwards on the ordinate corresponding to 20 amperes.
Any ordinate now drawn from the horizontal line A B to the curve will be divided into two parts where it is cut by the line A C. The length of the upper portion gives the electrical or ohmic drop, the length of the lower part represents the drop due to magnetic reactions alone.
What to read after The Practical Testing of Dynamos And Motors?
You can find similar books in the "Read Also" column, or choose other free books by Charles Frederick Smith to read onlineMoreLess
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