PPT Slide
How many turns must the windings of a 220/110 V. 60-Hz. ideal transformer have if the core flux is not to exceed 5 mWb.?
The emf equation, |E| » 4.44fNfmax., for the 110 V. (LV) coil yields N = 110 V. / (4.44´60 Hz. ´ 5´10-3 Wb.) » 83 Turns
The voltage turns ratio is a = 220 V. / 110 V. = 2 so the HV coil has twice (» 166 Turns) as many turns as the LV coil
Section 12.7: Principle of Operation of a Transformer cont.