lec13 - The peak value of the induced EMF is The AC voltage...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
The AC Generator A generator is a device that converts mechanical energy into electrical energy. An A lternating C urrent is generated in a coil that is made to rotate in a magnetic field. For a coil with N turns that is rotated with a constant angular speed ( ω ) in an uniform magnetic field ( B ) , the induced EMF is given by t NBA t N ε sin = ∆Φ = t (rad) π/2 π3 π / 2 ω ε NBA = 0 ω ε sin B ω B I B B I B 1 2 1 2 1 2 1 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The AC Generator (continue) The induced EMF reverses it direction every half of a revolution (hence A lternating C urrent).
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The peak value of the induced EMF is The AC voltage from power company refers to the rms value of the EMF, which is related to the peak EMF by The rotational angular speed ( ) determines the frequency ( f ) of the AC Therefore, an AC of 120 V at 60 Hz means which is generated with a rotational angular speed = 60 rev/s ( 120 rad/s ). NBA = 707 . 2 = = rms 2 = f V rms 120 =...
View Full Document

Page1 / 2

lec13 - The peak value of the induced EMF is The AC voltage...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online