hello I have this problem: a 3300/250v, 50Hz,1pH transformer has a core of effective cross sectional area of 13000m^2 and a low voltage winding of 80 turns. Determine: the number of turns on the high voltage windings a, 250v / 3300v = 0.075 80 / 0.075 = 1066.6 turns the maximum flux density of the core b, 13000mm^2 / 1000,000 = 0.013m^2 3300/4.44*50*1066.6*0.013 = 1.072T I was told this was wrong, though I cant find what is wrong. I have a guess that maybe the 0.013m^2 may be wrong but im not to sure. or the method for finding the high voltage windings any help would be appreciated thanks simon
ratio of voltages are 3300V/250V = 13.2:1 low voltage turns =80, so high voltage turns = 80x 13.2= 1056 turns
hey thanks a lot everyone for your help I looked at a few formulas and found that answer I used np = vp*ns/vs 3300*80/250 = 1056 I then got 1.0828T for maximum flux density by using 3300/4.44*50*1056*0.013 actually im not sure about that last part and cant figure it out properly. 13000mm^2, is that 0.013m^2, I don't know if that's right?
hello could I get some help, with this, im not sure if im right 13000mm^2 is that 0.013m^2 I don't know if that's correct? cheers simon