in rotating machines the air gap permeance in front of the slots changes with rotating rotor that it change flux in air gap and affect the voltage and current in machine.
baradaran from jondishapour university Iran
Wiki User
∙ 12y agoThere are no best harmonics.
Psy-Harmonics was created in 1993.
Sigma Harmonics happened in 2008.
Odd harmonics are theoretically the only harmonics that are produced by a push-pull amplifier, and even the level of odd harmonics should be very low.
Harmonics are a multiple of the fundamental frequency. If the power frequency is 60Hz, harmonics occur at 120Hz, 180Hz, 240Hz, etc.
Sigma Harmonics was created on 2008-08-21.
They're called "harmonics".
if a signal is not a pure sine wave it must contain harmonics
Harmonics are multiples of the fundamental frequency of the wave.
A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency. If the fundamental frequency is f, the harmonics have frequencies f, 2f, 3f, 4f, etc. Even harmonics are 2f, 4f, 6f, ... Odd harmonics are f, 3f, 5f, ... And remember: Even harmonics 2f, 4f, 6f,... are odd overtones. Odd harmonics f, 3f, 5f,... are even overtones. Scroll down to related links and look at "Calculations of harmonics from fundamental frequency".
That are harmonics: fundamental + overtones. Calculations of harmonics from fundamental frequency. Look down to the related links: "Harmonics Calculator".
Harmonics are really not needed in single phase transformers.