Electricity And Magnetism : a Mathematical Treatise for Advanced Undergraduate Students
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In our eReader you can find the full English version of the book. Read Electricity And Magnetism : a Mathematical Treatise for Advanced Undergraduate Students 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 Electricity And Magnetism : a Mathematical Treatise for Advanced Undergraduate Students
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For any given motor ( which fixes R) supplied with electricity at any potential E, the efficiency will be perfect or unity when i = 0. This will occur when all of the load, including friction, is removed, and the motor is running at such a speed that its electro- motive force E' which opposes E becomes equal to E.
The efficiency thus becomes perfect when the output becomes zero. The efficiency becomes fifty per cent 1 V when « = -_ or when the output is a maximum, and it Z Li E reduces to zero ...when i = -5-. There is no condition of R maximum efficiency here. 17 diminishes steadily from 1 to zero as i increases from to the rate of change being dy__ R Fig. 84. di~ W § 129 ELECTRIC CURRENTS.
201 This is shown in the upper line in Fig. 84. Counting in the work lost in brush and journal friction as useful work, commercial motors may, therefore, be very effi- cient, but they must be allowed to run at high speed.
The load must be much less than that corresponding to maximum output.
In Fig.
What to read after Electricity And Magnetism : a Mathematical Treatise for Advanced Undergraduate Students?
You can find similar books in the "Read Also" column, or choose other free books by Nipher, Francis E. (Francis Eugene), B. 1847 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
For any given motor ( which fixes R) supplied with electricity at any potential E, the efficiency will be perfect or unity when i = 0. This will occur when all of the load, including friction, is removed, and the motor is running at such a speed that its electro- motive force E' which opposes E becomes equal to E.
The efficiency thus becomes perfect when the output becomes zero. The efficiency becomes fifty per cent 1 V when « = -_ or when the output is a maximum, and it Z Li E reduces to zero ...when i = -5-. There is no condition of R maximum efficiency here. 17 diminishes steadily from 1 to zero as i increases from to the rate of change being dy__ R Fig. 84. di~ W § 129 ELECTRIC CURRENTS.
201 This is shown in the upper line in Fig. 84. Counting in the work lost in brush and journal friction as useful work, commercial motors may, therefore, be very effi- cient, but they must be allowed to run at high speed.
The load must be much less than that corresponding to maximum output.
In Fig.
What to read after Electricity And Magnetism : a Mathematical Treatise for Advanced Undergraduate Students?
You can find similar books in the "Read Also" column, or choose other free books by Nipher, Francis E. (Francis Eugene), B. 1847 to read onlineMoreLess
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