A Text-Book On Electro-Magnetism And the Construction of Dynamos
The book A Text-Book On Electro-Magnetism And the Construction of Dynamos was written by author Dugald C Dugald Caleb Jackson Here you can read free online of A Text-Book On Electro-Magnetism And the Construction of Dynamos book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text-Book On Electro-Magnetism And the Construction of Dynamos a good or bad book?
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Hence, to decrease B, requires an increase in the amount of iron but effects a saving in copper. On the other hand, to increase B effects a saving in iron but causes an increased use of copper. A balance, which depends upon the relative cost of iron and copper in the finished machine, is sought. The value of v evidently depends upon the form of the frame and the value of /'„+„. As the reluctance of the air space is the major part of P^+^, v evidently depends upon the dimensions of the air space... and of the leakage paths. Hence, if v be determined for one machine of a given type, it will have practically the same value for all other machines of the same type whatever their dimensions, provided the linear dimen- sions of the individual machines are always in the same proportion. In plain single horseshoe fields, v usually lies between 1.25 to 1.4 for the most efficient machines. In inverted single horseshoe (Edison) and plain double 140 ELECTRO-M AGNETI SM . horseshoe fields, v usually lies between 1.5 and 1.75.
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