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Newnes Circuit Calculations Pocket Book
book

Newnes Circuit Calculations Pocket Book

by Thomas J. Davies
April 2016
Intermediate to advanced content levelIntermediate to advanced
384 pages
12h 56m
English
Newnes
Content preview from Newnes Circuit Calculations Pocket Book
226 Circuit calculations pocket book
= 1.712 799.27°
9
2+ j9 = V(2
2
+ 9
2
) tan"
1
- = 9.22 777.47°
5 - j2 = V[5
2
+
(-2)
2
]
tan"
1
= 5.38 7-21.80°
Note
9.22 ,
777.47° - (-21.80°) = 1.712 799.27°
5.38
12.6 Further addition
Example 19 Derive an expression for the sum of the two waves
80 sin 2ir/r
85 sin
^2ir/f-
~j
There are three methods for solving a problem of this kind.
Method 1. By drawing.
Figure 12.10 shows the phasor diagram where OA and OB repre-
sent the maximum values to scale. OB lags OA by
TT/4
radians (45°).
Completing the parallelogram OABC gives the resultant OC.
Figure
12.10
By measurement OC = 152
By measurement 6 = -23.2° (-0.40 ...
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Publisher Resources

ISBN: 9781483101132