7.4.4

321 views
284 views

Published on

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
321
On SlideShare
0
From Embeds
0
Number of Embeds
8
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide






  • 7.4.4

    1. 1. !
    2. 2. Determine the slip of a four-pole induction motor running at 1440 r/min when connected to a 50 Hz supply. ! Ns = 120 x 50 = 1500 r/min 4
    3. 3. Slip speed = synchronous speed – rotor speed Slip speed = 1500 – 1440 = 60 r/min
    4. 4. ! Percentage slip = 1500 – 1440 x 100 = 4 % 1500 Note: At standstill (when starting) the slip is 100% but IF the machine could reach synchronous speed the slip would be zero.

    ×