Explain how a doubly fed alternator operates
What will be an ideal response?
A doubly fed alternator uses a tightly controlled ac voltage from an external source to generate the rotating field. The output frequency of the generator is determined by a combination of the rotating speed of the generator and the frequency of ac that is
supplied from the external source. As a result, the generator's output is controlled to be in perfect sync with the grid even if the rotor speed changes.
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How is vapor barrier taken off? How does the estimator determine the number of rolls required?
What will be an ideal response?
The speed of a three-phase squirrel cage induction motor is controlled by the frequency of the applied voltage
and _____. a. voltage dropping resistors b. the number of poles c. full-load torque d. armature current
Succesive approximation ADCs are faster than flash ADCs but slower than dual slope converters
Indicate whether the statement is true or false
Dead time and deadband refer to the same meaning.
Answer the following statement true (T) or false (F)