Calculation programs for transformers and inductors

[kees54]

No, for the wireless transmission of energy my programs are not designed.

I did try to calculate a transformer for a forward smps, but did not see this topology in your software, a half bridge
however can maybe be used.

regards

kees

 

[Starichok51]

I do not have the English version of a forward SMPS. only Russian.

 

[aharon.fin]

hi Dimonis .
maybe you can help:

Recently we have on the market wireless inductors for wireless charging.
For example see:
http://www.elytone.com.tw/upload/pro...1011164651.pdf



my questions is do we can use one of the inductor software to calculate this inductors.
If not what else can you offer.

Thanks
Aharon

 

[kees54]

I do not have the English version of a forward SMPS. only Russian.

I have find some russian and also tsjechian and even polish designs, schematics is not a problem, I am simulate this
moment in ltspice a fase shift version inverter and others for learn first all the aspects of these potential dangereus
electronics.

The program excellentit has no forward setting for calculate trafo, I did presume the halfbridge will do fine as replace
ment because the induction do seem the same as when calc half bridge.

thanks

kees

 

[Starichok51]

kees54, you write with a lot of errors. translator can not translate a lot of words. therefore it is impossible to understand you.
from what country are you? if you can communicate in Russian, you will find the address in the Menu "About".

 

[kees54]

I am from Holland, and I do not use a translator, for me I understand fine, I now english is not very good because I do write
only and not speak daily.

I did try to say that the transformer software has no settings for a forward type smsps transformer, and so I did try to ask
how I can overcome this, for example a push pull calculation who is close to that forward type transformer.

This kinds of smps is also very interesting, see files/foto.









You can find this pdf,s on internet, google for fase shift zero switching power inverters.

regards

kees

 

[dimasroma]

Hi Starichok51,
I have question for you.
How to calculate series capacitor (Cs) with primary inductance (Lp) in half bridge?
if Lp=700uH and frequency switching (f)=100KHz, Cs=...?
Below detail schematic of half bridge.

 

[Starichok51]

capacity depends on the frequency and output power. in your case you need to take a 1 uF / 300 W.
This question does not apply to my program and is offtopic.

 

[dimasroma]

Hi Starichok51,
Thanks for reply. I am sorry if my question out of topic.
I use your program "ExcellentIT(7300)" to find Lp value but I have confuse to calculate series capacitor.

 

[theoldwizard]

Thank you (спасибо) !

Starichok51 and dimasroma, many thanks for all of your work !

Are you aware of the Google "little box" inverter challenge ?

An open competition to build a (much) smaller power inverter, with a $1,000,000 prize.

Design and build a kW-scale inverter with the highest power density (at least 50 Watts per cubic inch).

 

[kees54]

Are there also calculators for serie resonant smps tranformers? I need that for welder.

I thought I have see exellentIT somewhere who can do this, a special version of it.

thanks

kees

 

[Starichok51]

I have a program for resonant SMPS transformers, but it is only in Russian.

 

[kees54]

I have a program for resonant SMPS transformers, but it is only in Russian.

Maybe it can be translated? I have one who do not work, serie resonant is a promissing new technology, zero switching
smps is nice for high frequenty converters and is used extensily in high power applications like telecom.

 

[Starichok51]

No transfer of their programs, I will not do more.


I came to this forum to earn some money. But no one listed on purses single cent.

 

[kees54]

I did calculate them myself, it is not that hard with all the pdf,s on internet, but I think I do not need
that big stuff, a simpel forward converter will do for car welding or simple household stuff with fase
shift controller for easy regulation..

But it is very nice stuff, here is maybe mony to earn when yiu get the hang of it, but earn mony with
a country like China who do things very cheap is very hard, I do high end hybrid amps therefore I do
investing in smps for it and so try to start with the biggest one a weld inverter.

http://www.microsemi.com/document-p...itions-in-welding-br-and-similar-applications

regards

 

[kees54]

Did you make the software? because put it on diyaudio.com can work to make some mony, also
making program also for zvps smps and fase shifting and more can make some mony, search google for
fase shifted zero switching technology who is the new direction for high current smps, special because
of electric cars and such will be future, I think that the economics a la 2007 never returns, we have to go
durable.

Read just on the news that so much electronics get throw away 42.000.000 tons from what just 2.1 procent
is recycled properly, you did see the news about africa, terrible dangereus when not recycled properly, so
we need durability.

regards

 

[Starichok51]

for resonant converters exist Application Note AN-1160 from irf.com.
I did the program on this Application Note.
please do all the calculations in this Application Note.

 

[kees54]

Thanks


I will go look at it, I have download a lot of this kind of stuff already, zero switching is very nice.

PS there is a source editor around who can easely translate russian in english or more.


regards

kees

 

[Abet]

I came to this forum to earn some money. But no one listed on purses single cent.

Hi Starichok,

I have downloaded your calculation program just now, I wanted to use your program to calculate output inductor for use with Class D amplifiers.
I was so happy to see that it supports ETD,EE, EI ferrite types. I'm new to this topology of PWM and the amplifier I am working with is delta-sigma modulation. However, I didn't realize that you are offering the program for a profit. I feel sad that no one up to this date made a single donation/payment for the program. Perhaps you need to change your approach, like make a new revision but don't share/publish them rather offer them on purchase. In reality the only thing that gets huge profit in e-world are the service providers.

As this is a hobby of my own interest, all I can give you is a BIG Thank You for the program. You've help a lot. Kindness has its own rewards.

All the Best!

 

[kees54]

Hi There


Can someone explane me how to use the outcome of this program into LTspice IV? I am just a very bad calculator guy.

I read something about square root of turns ratio.

I did see in a example 900 mH !! but when use 900 uH is closer to reality 900 mH is a very big inductor who is not usable in
a smps, so I think it means different of so..

Thanks for explaning me. Th K factor and such I do now.

Setting the turns ratio of the transformer
is simply a matter of choosing
the right inductor values. Remember,
the inductance is proportional to the
square of the turns ratio. In the example
above, a turns ratio of 1:3 gives
a 1:9 inductance ratio. How? if I do 1:.3 I get 3.33 square of that gives 1.82.

regards

kees