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Shipboard Electrical Power Systems
book

Shipboard Electrical Power Systems

by Mukund R. Patel
December 2011
Intermediate to advanced content levelIntermediate to advanced
370 pages
12h 24m
English
CRC Press
Content preview from Shipboard Electrical Power Systems
6 Shipboard Electrical Power Systems
values are customarily implied in the power eld, and we will do the same in this
book as well.
For average power, we recognize that the voltage and current that are out of
phase would produce less average power than those in phase with their peaks occur-
ring at the same time. If V and I are in phase (θ = 0), their product P = V × I is always
positive even when both V and I are negative during one half cycle. However, when
θ ≠ 0, the instantaneous power is negative when either V or I is negative and the
other is positive. If positive power means power owing from the source to the load,
then negative ...
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Publisher Resources

ISBN: 9781439828175