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you mean using wire instead of foil is not nessecory?which you recommend at this current rating?
i didn'exactly get your points.can you explain visually?or give me pdf that explain these points?
you mean i cant wind with foil as perfect as original transformer?and therefore i get eddy current?
no ,my core dosn't have gap.
so it seems i should try litz winding. i'm gonna use 9 wire in parallel(0.5mm) but there is one question.for better result and best coupling how i wind them ?
1-all 9...
i did it but i have some problem
first lets describe my work
i bought a 400watt modified sine wave inverter and by add a EGS002 module , turns it to a pure sinewave inverter.
i test it with a 250watt load and it work perfecly for 1 hours but with one problem.
problem was output voltage which was...
i want to make a 12v to 220vac inverter and for transformer winding i need help.
which winding is better and has lower leakage inductance?
or do you recommend better winding type?
frequency is 50KHz and power is about 350watts
hi guys
i saw in many commercial modules(buck-boost-etc...) for current limit section they use an op-amp and connect it to FB pin of controller.
but why they didn't use controller;s built-in current limit op-amp?just connect two sides of shunt resistor to current sense pins and then no need to...
about SP4522B you right but in discharge mode it uses boost topology so it is a synchronos dc-dc boost converter for sure.
in datasheet there is no much notes about output capacitor , unfortunately i use ti source to choose capacitor
now with 400ma ripple current how much ripple voltage produced...
my SMPS IC is SP4522B.
http://www.tpower-ic.com/Upload/SP4522B_CN_V12-14314783738.pdf
but I use application note from Texas Instrument to choose right capacitor for my application.
ti says use both tantalium and ceramic capacitors and using large amount of low ESR ceramic capacitor in output...
hi
i build a boost converter to convert 1 cell li-ion to 5V/2A(500khz operating freq)
datasheet of ic says use low ESR tantalium capacitor for output and says capacitor's ESR causes voltage ripple and formula is : ∆V= ESR×Iout
i want to use a AVX 100uf tantalium capacitor which has a 0.5ohm ESR...
from what i realize vary in output voltage is small and it is not harmful for cell at all since maximum current is limited to 2amps and both modules stop charging at 4.2.
the only issue here is current flowing beetwen two modules.am i right?so if two modules connected together works without...
hi
i want to charge 1 cell lithium battery at 2a current because i need faster charging rate.
so i want to parallel 2 tp4056 module.
is that possible?is there any problem?
i change the secondary winding and now it's resistance is 0.055ohms
i put the transformer under load again and motor stall current was 5.5amps and voltage was 9volts.that was big improvment.now voltage drop is about 3.8volts instead 6.8volts in previous winding.
now by improve power factor...
so a big problem here is poor power factor.is there any way to imporve power factor?and raise it up above 0/8?
i change my secondary winding and use a wire with 0.1 ohm total resistance to see what happens.on paper output voltage should raise up about 4volts.
operating flux is about 1 tesla due to this formula: V=4.44NFBA where V=220vac , N=1050 , F=50hz A=90mm2
there are 5 more turns of secondary under yellow tape and secondary winding covers abou 3/4 or 7/8 of the toroid surface.( you want to say may it causes about 7 volts drop in...
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