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La Tecnica delle Correnti Alternate

Nature volume 68, page 221 (09 July 1903) | Download Citation



THE course of evening lectures read before a class of artisans is here given in book form. Except for an occasional algebraic expression, mathematics are rigidly excluded, and yet the author tackles the most complex phenomena of alternate currents, arid discusses the behaviour of synchronous, asynchronous and rotary-field motors, with their various starting devices; of rotary converters and their tendency to hunt; of alternators running in parallel, and of wave propagation in long lines. And he does this with so much success that the usual treatment on the basis of a sine wave-form compares unfavourably. A mathematical treatment of the subject is practicable only on the assumption of sine-waves, and the evil of this is that students are apt to forget that in practice the wave-form is rarely sinusoidal, and generally so far removed from it that the theoretical deductions are then valueless. To deal with alternate currents is far harder without than with the use of sine waves, and the author is to be congratulated on his success. The book, in fact, is not an elementary manual, but an up-to-date treatise, its language suited to the artisan and its substance to any student.

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