. Electrical world. siswithout having read over all the preceding discussion of the prin-ciples. First, take the wave to be analyzed and divide the base line intothirty-six equal parts, starting at the zero value of the wave. Erectordinates at each point of division and measure their values. Placethe values of these measured ordinates in the left-hand column ofthe table, marked Measured Ordinates. , multiply each meas-ured ordinate by the constants in the various columns opposite; thisis quite readily done by means of a slide rule. The two blankcolumns are left to the right of each column
. Electrical world. siswithout having read over all the preceding discussion of the prin-ciples. First, take the wave to be analyzed and divide the base line intothirty-six equal parts, starting at the zero value of the wave. Erectordinates at each point of division and measure their values. Placethe values of these measured ordinates in the left-hand column ofthe table, marked Measured Ordinates. , multiply each meas-ured ordinate by the constants in the various columns opposite; thisis quite readily done by means of a slide rule. The two blankcolumns are left to the right of each column of constants in orderthat the positive and negative products can be placed in separatecolumns and thus render the addition of the columns more the columns of products should be added and the difference be-tween the positive, and negative values determined for each set ofpairs of columns. This difference for each is then multiplied by theconstant .0555, care being taken to preserve the sign of each oper-. FIG. 2.—FIFTH OF THE CURVE. ation. The products resulting from the constant .0555 into thevarious differences are values of the amplitudes of the respectivecomponent harmonics, the number of the harmonic being indi-cated by the subscript of the letter A, heading the columns of theconstants in the table, for the sine components and the letter B, forthe cosine components. Having determined the components of the various harmonics, asdescribed above, the harmonic is determined thus: Its amplitude is\A- -\- B-, and the harmonic goes through its nearest zero valueto the zero value of the fundamental, at an angle whose tangent isB/A, ahead, or behind the fundamental as determined by the signsof A and B. The rule for determining angles between the funda-mental zero and the nearest harmonic zero to it, is as follows: IfA and B are both positive, the harmonic is ahead of the fundamentalless than 90°, by an angle whose tangent is B/A; if A is negativeand B positi
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
