October 2013
Beginner to intermediate
352 pages
15h 8m
English
Content preview from Electric Motors and Drives, 2nd Edition
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72 Electric Motors and Drives
converter is used to feed a motor, the sound from the motor is
usually a good deal louder than the sound from the converter
itself.
These sounds are very difficult to describe in words, but
typically range from a high-pitched hum through a whine to a
piercing whistle. They vary in intensity with the size of
converter and the load, and to the trained ear can give a good
indication of the health of the motor and converter.
COOLING OF POWER SWITCHING DEVICES
Thermal
resistance
We have seen that by adopting a switching strategy the power
loss in the switching devices is small in comparison with the
power throughput ...
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