EE1 PEEE Refresher Class Power Part 3 notes by T. Ernst EE1 – Power Part 3 NotesFall 2011, Page 1.
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Transcript of EE1 PEEE Refresher Class Power Part 3 notes by T. Ernst EE1 – Power Part 3 NotesFall 2011, Page 1.
![Page 1: EE1 PEEE Refresher Class Power Part 3 notes by T. Ernst EE1 – Power Part 3 NotesFall 2011, Page 1.](https://reader036.fdocuments.us/reader036/viewer/2022062321/56649ef45503460f94c079b4/html5/thumbnails/1.jpg)
EE1PEEE Refresher Class
Power Part 3
notes by T. Ernst
EE1 – Power Part 3 Notes Fall 2011, Page 1
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Fall 2011, Page 2
EE1 – Power Part 3 Notes
• Induction Machines• Motors• Generators
• Synchronous Machines• Motors• Generators
• Double fed induction (variable speed synchronous)
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Fall 2011, Page 3
EE1 – Power Part 3 Notes
Induction Motors•Squirrel cage
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Fall 2011, Page 4
EE1 – Power Part 3 Notes
Only generate torque when slip is not equal to 0•Slip frequency [hz]•Slip speed [RPM]
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Fall 2011, Page 5
EE1 – Power Part 3 Notes
Synchronous speed f(frequency & poles)
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Fall 2011, Page 6
EE1 – Power Part 3 Notes
What is the difference between a motor and a generator?•Slip?•Power transfer?
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Fall 2011, Page 7
EE1 – Power Part 3 Notes
Induction motor nameplate
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Fall 2011, Page 8
EE1 – Power Part 3 Notes
Induction motor nameplate
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Fall 2011, Page 9
EE1 – Power Part 3 Notes
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Fall 2011, Page 10
EE1 – Power Part 3 Notes
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Fall 2011, Page 11
EE1 – Power Part 3 Notes
Locked rotor current example: 250 HP, code F
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Fall 2011, Page 12
EE1 – Power Part 3 Notes
Locked rotor equivalent impedance
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Fall 2011, Page 13
EE1 – Power Part 3 Notes
If FL (250 HP) speed is 3450 RPM, what is speed at 200 HP?
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Fall 2011, Page 14
EE1 – Power Part 3 Notes
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Fall 2011, Page 15
EE1 – Power Part 3 Notes
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Fall 2011, Page 16
EE1 – Power Part 3 Notes
Reduced Voltage Starting•Auto-transformer•Series inductor
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Fall 2011, Page 17
EE1 – Power Part 3 Notes
Reduced Voltage Starting• ½ - ½ • Wye start – delta run