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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
Economic Use of Power 287
in Figure11.8. It shows that above the synchronous speed, the motor—although
running in the same positive direction—develops negative torque, giving negative
mechanical power, meaning it absorbs the mechanical power at the shaft instead of
delivering. Since the current also becomes negative (owing backward to the source),
this negative power is converted into the electrical power and fed back to the lines,
that is, the machine now works as the generator. On the left-hand side of zero speed,
at negative speed (i.e., running backward), the motor torque is still positive, again
giving negative mechanical pow
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Publisher Resources

ISBN: 9781439828175