23 Threads found on edaboard.com: Smps Transformer Calculation
For designing power transformers using CRGO and low cost core, normally we use some simple formula which relates transformer cross sectional area, core permeability and some turns/volt etc. Such simple calculations are practically sufficient for our purpose.
Just like that is there any easy method for claculating (...)
Analog Circuit Design :: 27.07.2007 01:22 :: UroBoros :: Replies: 3 :: Views: 19282
ELECTRICAL POWER transformer AND INDUCTOR DESIGN : Power transformer & Inductor- Design Principles, calculation, Software
BASIC PRINCIPLES, calculation, THEORY, TUTORIALS, AND OTHER INFORMATION
Good News : Calculators are there
Power Electronics :: 28.02.2012 09:28 :: papunblg :: Replies: 6 :: Views: 721
I designed some smps transformer based on practical method. But the problem is if I change one turn +/- total performance changes a lot. I need the calculation method. Can anyone help me in this case please?
Analog Circuit Design :: 15.04.2012 11:23 :: Mithun_K_Das :: Replies: 0 :: Views: 814
i want to winding my smps transformer.i have three kind of wire (.20 , .15 , .10) and EI25/19 core.and i going to make forward transformer with Pout=60(15 volt,4Amper)
and my frequency is 50Khz.could you tell me the calculation and how i can do it?
Analog Circuit Design :: 02.06.2012 12:41 :: baby_1 :: Replies: 1 :: Views: 802
If you dont have any experience with HV HF transformers you better start with a step-down transformer 240Vac/24Vac, use bridge rectifier and a ≈4700? smoothing capacitor and then employ one of the switchmode step-down (buck) converters such as LM2576 or similar ( ).
Once you gain experience in switch
Analog Circuit Design :: 28.04.2005 08:50 :: IanP :: Replies: 4 :: Views: 1730
you will find more than the information you need in any design book of smps I suggest switch mode power supply a book written by Heith
Electronic Elementary Questions :: 02.06.2006 18:42 :: ghaly :: Replies: 7 :: Views: 11588
I have jus designed a half bridge switching power supply of 300W , switching at a frequency of 100 Khz. now im in the mode of building the prototype...but i am quite blur on the type of power transformer that i should use...can anyone advise me on this matter.
Analog Circuit Design :: 14.02.2008 02:45 :: jegandren :: Replies: 5 :: Views: 3260
I need smps output transformer design calculation.
Where should i refer? Please guide me some link or direction.
Power Electronics :: 29.01.2011 03:54 :: harii74 :: Replies: 3 :: Views: 3007
Current density numbers like 4 A/mm? are useless for smps transformers. Usually they are designed for a specific overtemperature based on surface area and losses, power losses are e.g. equally shared between core and copper. But skin and proximity effect are severe for 84 kHz and 0.5 mm wire gauge, expectable AC/DC resistance factors are 5 or more.
Power Electronics :: 10.09.2011 18:00 :: FvM :: Replies: 10 :: Views: 1328
For a 60W power output you may consider the FlyBack design.
The Flyback smps theory and some design calculations details here: You may use:
1. standard UC 3842 In flyback mode with a mosfet rating of 800-900 volts
One example of smps
Power Electronics :: 14.05.2012 02:37 :: mister_rf :: Replies: 9 :: Views: 999
Is it important to use iron core ? why not an smps ? you need just 110 volts 50A ? right ? 5.5kW ? if yes , you can use a simple H bridge .
Power Electronics :: 01.07.2012 06:46 :: goldsmith :: Replies: 4 :: Views: 914
Friends i need the details for Ferrite transformer winding.
I am working in the smps design, i need a help for ferrite transformer calculation. Please help me.
smps input: 230Vac
output: 12Vdc / 1Amps
Please help me for, what are the spec i need?
How to calculate primary & secondary winding (...)
Power Electronics :: 07.08.2012 03:08 :: nonkannan :: Replies: 2 :: Views: 841
I once designed an smps with a uc3842. I made the transformer by myself. I wonder are there ready to buy transformers for this type of ICs at some different configurations and power ratings and where can we find like digikey or etc?
Robotics and Automatics Forum :: 27.06.2005 18:27 :: seyyah :: Replies: 3 :: Views: 1653
Can anyone suggest me the site for transformer design for both linear regulator and smps
Professional Hardware and Electronics Design :: 17.01.2007 00:27 :: saurav_sdpl :: Replies: 2 :: Views: 1823
For both i.e Step up & Step down for both the frequencies 20 KHz or 50 KHZ
for a step-up(car smps) with 12V at the primary, I use 100R & 100n...
Hobby Circuits and Small Projects Problems :: 01.03.2008 02:25 :: rx5 :: Replies: 5 :: Views: 8406
Hi, i made a smps with 3842 and 9n80 it works very well at no load or at very few load (its capacity 12v is 3amp)but as soon put an induction load its temp. rises and after some time i.e. within 5min. the fet blown up . What happend in circuit ..................
Analog Circuit Design :: 12.10.2008 04:59 :: Praful :: Replies: 21 :: Views: 3997
how do i stop "flux walking" in an offline push pull converter?
it can't be done with current sense as this would mean the load current being stopped ?
Electronic Elementary Questions :: 27.11.2008 15:53 :: eem2am :: Replies: 11 :: Views: 5138
Hi, I have made one flyback smps with this specification.
Vout=100v to 1300v (variable), Iout=40 mA , Vin=22v - 30v (DC-2 Battery)
Controller IC=UC3842 , transformer=EE50-42 , gap=1mm , Lp=14 uH , Ls=85 mH , Ip=14A, Np=9 Ns=600 , Bmax=100 mT
Is it true? I see one site with below link that calculate all of one smps properties but it (...)
Hobby Circuits and Small Projects Problems :: 15.02.2010 16:00 :: tictac :: Replies: 1 :: Views: 2250
i want to make a toroidal iron core transformer.i have searched the net but found nothing .calculations are available only for smps toroids
i have made transformer with ei cores.with the help of this eq
i want to make 600va 50-0-50 in toroidal iron core with what are the (...)
Power Electronics :: 14.09.2010 06:25 :: ravslanka :: Replies: 1 :: Views: 1681
it is pretty simple . what are the specifications of your smps ? out put voltage and current and frequency of operation .
Thus i can help you as well .
Analog Circuit Design :: 25.05.2012 09:30 :: goldsmith :: Replies: 3 :: Views: 673
I assume this is an offline design.
i can have a frequency between 29Khz to 200Khz
You're referring to a range of possible frequencies you want to try, right? You're going to have a fixed frequency during operating and try different frequencies. Isn't that right? Or do you intend to alter the frequency during the circuit operation o
Analog Circuit Design :: 30.05.2012 07:06 :: Tahmid :: Replies: 5 :: Views: 445
I plan to build one transformer with ETD49 core from Epcos, for a smps power supply.
Output: 10 40 V and 20 A continuous, not peak.
Frequency: 50 kHz
Main concern is about litz wire,and how much current allowed.
Power transformer 1:1, after rectifying from transformer RKT80030, chopping and gate (...)
Electronic Elementary Questions :: 25.04.2013 15:03 :: jmx66 :: Replies: 7 :: Views: 511
I think that this is a not difficult to be make, all is depend from your skills.
If you want good and compact power supply you must use switching mode PS.
See link below, this is a very good smps controllers, in the site you an find soft for calculation, but you must know that PSPU quality is directly connected to the transformer quality. (...)
Hobby Circuits and Small Projects Problems :: 09.11.2005 23:21 :: Tohu :: Replies: 10 :: Views: 1385