• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
FREQUENCY - 14177_75
VOLTAGE REGULATION - 14177_77

Neets Module 05-Introduction to Generators and Motors
Page Navigation
  59    60    61    62    63  64  65    66    67    68    69  
3-14 illustrated in figure 3-12; a two-pole generator must rotate at four times the speed of an eight-pole generator to produce the same frequency of generated voltage. The frequency of any ac generator in hertz (Hz), which is the number of cycles per second, is related to the number of poles and the speed of rotation, as expressed by the equation where P is the number of poles, N is the speed of rotation in revolutions per minute (rpm), and 120 is a constant to allow for the conversion of minutes to seconds and from poles to pairs of poles. For example, a 2-pole, 3600-rpm alternator has a frequency of 60 Hz; determined as follows: A 4-pole, 1800-rpm generator also has a frequency of 60 Hz. A 6-pole, 500-rpm generator has a frequency of A 12-pole, 4000-rpm generator has a frequency of Q17.   What two factors determine the frequency of the output voltage of an alternator? Q18.   What is the frequency of the output voltage of an alternator with four poles that is rotated at 3600 rpm?






Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.