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## Transformer Design Formula |

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transformer formula , transformer design software , inverter transformer design , switching transformer design

37 Threads found on edaboard.com: **Transformer Design Formula**

Any body can provide the total calculation on **transformer** **design** with PWM in push pull topology used in inverter circuit.
Example- input 12vdc output--220vac VA rating--500va freq. 50hz
How the **transformer** size reduces in inverter & UPS with E-I iron core.
When i calculate with conventional **formula** of (...)

Electronic Elementary Questions :: 14.04.2008 12:33 :: 1230 :: Replies: **0** :: Views: **1981**

Hello all
I need to know the toroidal **transformer** **design** calculation.
How to find core area?
How to find turn per volts? and etc.
Please give me a direction in this.

Power Electronics :: 02.02.2011 09:00 :: harii74 :: Replies: **13** :: Views: **7446**

Can anyone help me with Push Pull **transformer** **design**....12V on the Low voltage side....Switching Frequency is 100Khz and Demand on Secondary side is the Primary No of turns by **formula** N = (V x ton) / (B x Ac) *verified by many books
where ton is the switching on time for one MOSFET and B is the change in flux density which i have ke

Power Electronics :: 11.06.2011 07:59 :: arsalanarahim :: Replies: **2** :: Views: **1681**

I'm interested in
1. How to calculate Coil Turns.
2. How to Select SWG ( Wire Guage )
3. Ferrite / CRGO ( E-I ) Core selection.
Finally how to **design** **transformer** and Inductors.
Thx
Ranjan Nandi
Added after 1 hours 49 minutes:
For transferomer I found a

Electromagnetic Design and Simulation :: 01.04.2006 11:54 :: nandi_ranjan :: Replies: **6** :: Views: **2641**

You do not specify what kind of **transformer** you want to **design**. There are several type of **transformer**s and the **design** procedure can be very different.

Electronic Elementary Questions :: 23.06.2007 09:23 :: cesare :: Replies: **5** :: Views: **1877**

You should find out the primary inductance of the **transformer**. The **formula** relating inductance and power applies.
P = 0.5 * L * I^2 * f
P = power
L = inductance
I = current
f = switching frequency

Analog Circuit Design :: 04.03.2008 02:57 :: yeechyan :: Replies: **5** :: Views: **2809**

Good question!
I think Picstudent is talking about flyback **transformer**.
Hope someone here can explain the most reasonalbe **design** for flyback **transformer**.
The question can be more exact if we take 5V/1A output **design** as an example.
Added after 2 minutes:
Here is some starting point as I know:
1. The

Analog Circuit Design :: 27.07.2007 03:07 :: hardings :: Replies: **3** :: Views: **19491**

Hi
For **design**ing power **transformer**s 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 (...)

Microcontrollers :: 27.07.2007 01:28 :: UroBoros :: Replies: **4** :: Views: **3727**

Hi
I have to **design** and built a half bridge converter with following specifications
Vin = 12V-24V
Vout=6V
Iout=4A
Can some one tell me how to calculate ad **design** required **transformer**.
I have no idea about this and no additional data is available..if some one can give me or point me to all equations required to (...)

Power Electronics :: 23.11.2010 08:34 :: aruna1 :: Replies: **6** :: Views: **2602**

Your calculations appear to take most everything into account.
I have not done such calculations myself. Making a **transformer** is work. And when I'm finished it may not perform according to my calculations.
I know it is important to find the proper balance between many parameters:
* current
* number of windings
* turns ratio
* metal mass
* freque

Analog Circuit Design :: 14.02.2012 17:45 :: BradtheRad :: Replies: **76** :: Views: **10410**

Hi,
I need primary and secondary winding **formula**s for the following **transformer**s,
(1) ETD 29,34,44,49.
(2)EE small/big.
(3)RM 10,12_small big.
(4)EC40.
(5)PQ3535.

Professional Hardware and Electronics Design :: 22.02.2012 06:06 :: billu8660 :: Replies: **8** :: Views: **2268**

How do i caclculate the area needed for a ferrite **transformer** , knowing the power needed ? Is there a **formula** ?

Electronic Elementary Questions :: 31.05.2006 13:37 :: himmler :: Replies: **7** :: Views: **11849**

hello,
I have a question regarding this article 'A General **design** **formula** of multi-section Power Divider Based on Singly Terminated Filter **design** Theory' on wilkinson power divider **design**.
Let's take a 4-section power divider just for verifying the **formula**s.First, I got the impedance of optimum (...)

RF, Microwave, Antennas and Optics :: 01.03.2007 18:12 :: alard :: Replies: **4** :: Views: **2473**

Have a question about **transformer** calculation for half-bridge topology.
Want to say that I am not experienced in **transformer** calculation.
I need to **design** a **transformer** which should feed the purely resistive load with 850VAC, 60khz. The power of the **transformer** should be 55W. I have chosen a core (...)

Analog Circuit Design :: 27.03.2007 14:50 :: belax :: Replies: **0** :: Views: **1123**

I am looking for a software to calculate simple coils and **transformer**s?
Can someone give me some names or links?
Thanks
Tronoty

Electronic Elementary Questions :: 16.06.2008 10:42 :: tronoty :: Replies: **4** :: Views: **4335**

How do we choose the wire gauge in SMPS **transformer**.
I know the skin depth **formula** but I would like to **design**, let said a **transformer** operating at 500Khz with 6A output, the **formula** give me a wire AWG 30 (Rac=Rdc)
according to each wire support 0,14 A it mean that I need 43 wire ... Is that right ? Is

Analog Circuit Design :: 01.10.2008 20:48 :: sec :: Replies: **6** :: Views: **4541**

The said expression is an empirical **formula**, that is fitted to measurements rather than calculated. There are various similar
**formula**s in use. As ferrite manufacturer application notes clarify, the parameters depend both on material and core shape.
I would generally suggest to use the manufacturer provided **design** tools for (...)

Analog Circuit Design :: 02.01.2010 05:18 :: FvM :: Replies: **5** :: Views: **2614**

Hi dears,
I'd like to **design** a diode detector with square-law characteristics and I need to how to **design** it? As I know from its basic circuit that it consists of impedance **transformer**, RF choke, diode and bypass capacitor. I need to know how to calculate the input impedance of diode to **design** the impedance (...)

RF, Microwave, Antennas and Optics :: 01.03.2010 06:33 :: raed_microwave :: Replies: **3** :: Views: **2353**

Hi Friends,
Am new to this antenna **design**, am a student and i have not much clear exposure in this field. It would be very grateful, if anyone can guide me in the following **design** using FEKO.
Frequency is 4.25Ghz,
a)i have to **design** a pin fed patch antenna with ‘air substrate’ to work with a 50 Ohm co-ax feed of wire radius (...)

RF, Microwave, Antennas and Optics :: 10.05.2010 07:20 :: sbalajichennai23 :: Replies: **1** :: Views: **1017**

i want to **design** ferrite core **transformer**.
Anyboddy can help me in **design** pls tell me wats the **formula** here to find area, primary winding and secondary winding.. voltage and current....

Power Electronics :: 19.05.2010 06:01 :: Zeshee :: Replies: **1** :: Views: **1461**

Hello,
I'm using a microstrip quarter wave **transformer** with an open end connected to a short stub(part of impedance matching for a transistor).
As far as I know a wider microstrip(smaller Z0) for the **transformer** would result in better bandwidth. However I cannot understand why!
Can you help me with understanding the connection between the

RF, Microwave, Antennas and Optics :: 11.08.2010 09:22 :: n3x :: Replies: **1** :: Views: **973**

Number of turns depends on specified windings voltage, frequency, core crosssection and allowed core flux, not transmitted power. For a 50 Hz **transformer** with iron core, you have typically n= 42*V/A, V is voltage A is crosssection in square cm.

Power Electronics :: 05.06.2011 08:24 :: FvM :: Replies: **3** :: Views: **605**

One way to decide your primary inductance should be such that you magnetizing current is <5% of max load current. But this is not a golden rule. In reality i believe for 50Hz **transformer** it would be primarily driven by no of turns needed to hold-of voltage in primary

Power Electronics :: 22.09.2011 09:31 :: atripathi :: Replies: **5** :: Views: **1966**

thanx before KB6NU, for the reply,
i'm using a ferrite core for the balun but i don't know about mu, can u give some valid reference for what kind of ferrite for mu, that suitable for VHF frequency and i need **formula** for the winding ratio of balun, can u give some valid reference for that too because i got a lot of reference b

RF, Microwave, Antennas and Optics :: 04.10.2011 23:31 :: enjunear :: Replies: **7** :: Views: **960**

hello sir, i am doing engg. i want basics concept to **design** unregulated power supply circuit i know the component i need but when i draw schematics digram i have no idea. how to calculate ,what **formula** i need?
how can i chose rating of component
230v-**transformer**+diode+capacitor-12v
**transformer**- power rating (...)

Microcontrollers :: 29.11.2011 11:05 :: vead :: Replies: **1** :: Views: **267**

Hello
i want to **design** and create a **transformer** that Pout should be equal 75wat.i have EI2520 core and wire with these diameter
.15 , .10 , .20
i use Current PWM IC and a MOsfet for switching. i want to have a voltage 18V-4A output my frequency is undefined because i can have a frequency between 29Khz to 200Khz
input voltage after rectifier

Analog Circuit Design :: 30.05.2012 04:24 :: baby_1 :: Replies: **5** :: Views: **502**

The **formula**s are different.
It has something to do with a 50 % duty cycle (or close to it) being desirable in a coupled inductor boost converter.
It is because it is a different inductance through which the flux field collapses, from the inductance through which it grew.
And at a different turns ratio.
Hence the **transformer** primary is calculated

Hobby Circuits and Small Projects Problems :: 21.05.2013 04:08 :: BradtheRad :: Replies: **4** :: Views: **476**

Hi,
I have to **design** a 40 Watt Flyback **transformer**.
SPECS
-------
1. Primary 230 VAC
2. Secondary 12 Volt
3. Pout = 40 Watt
4. Creepage distance = 6.4 mm
5. Primary inductance = 500 uH
6. Secondary winding = sandwhiched inside the 2 primary halves
QUESTION 1
-------------
Which core is best to keep the Leakage inductance below 1

Power Electronics :: 20.06.2013 03:32 :: edaenrico :: Replies: **5** :: Views: **392**

I would like to use an offline PFC flyback controller that operates in critical/boundary conduction mode.
I am stuck in trying to figure out what my magnetizing inductance Lm for my flyback **transformer** should be! The datasheet only recommends part numbers, but I would like to know how they f

Power Electronics :: 27.08.2013 18:02 :: AlienCircuits :: Replies: **4** :: Views: **390**

I am trying to **design** a 1 Amp power supply, it is going to use center tapped **transformer**, i need to choose the diode with correct characteristics for a full wave rectifier. I have problem with Ifav or forward average current during conduction. The **formula** given in the book(microelectronic circuits by sedra and smith) is
Iav = (...)

Analog Circuit Design :: 04.10.2005 18:44 :: Lucifre :: Replies: **5** :: Views: **801**

Snubber dimensioning depends on **transformer** stray inductance. A **design** criterion could be a from maximum overvoltage at the MOSFET. As power MOSFET usually have the ability to absorb overvoltage in normal operation, it must not be absolutely necessary. If not knowing stray inductance values by **design**, empirical dimensioning is probably most (...)

Hobby Circuits and Small Projects Problems :: 29.02.2008 02:29 :: FvM :: Replies: **5** :: Views: **8703**

Hi everyone, I am planning to build an Inverter with a step up DC-DC stage switching at 20KHz coupled to the Inverter stage directly without an High frequency **transformer**. After the Inverter stage I intended to filter the resulting mid voltage range PWM output and use a 60 HZ power **transformer** to step up the ouput to 230v(note the inverter stage

Hobby Circuits and Small Projects Problems :: 17.07.2008 07:37 :: babinton :: Replies: **20** :: Views: **8785**

The input impedance of a transmission line of length l terminated with load ZL is given by:
Zin=Z0(ZL+jZ0tan(Bl))/(Z0+jZLtan(Bl))
where, B=2*pi/λ.
the λ/4 line is known as the quarter-wave **transformer** and the input impedance of this line is given by (letting l=λ/4 in the above **formula**) :
Zin

RF, Microwave, Antennas and Optics :: 02.12.2010 05:20 :: amihomo :: Replies: **7** :: Views: **2886**

thank sv1437.
i will go check it first.
Do u know how to calculate the impedance of loop array or dipole array? and the feed line impedance for loop and dipole ?
For normal dipole array, what will be the impedance variation within a frequency range? I need to add a balun and impedance **transformer** to tune it to 50 ohm.
I can simulate the result but

RF, Microwave, Antennas and Optics :: 22.01.2011 01:39 :: long88 :: Replies: **2** :: Views: **668**

As pic deals with 5v so you need to step down your voltage to 5v by using **transformer**.
Use two analog pins for seperate mode (AC and DC).
use a **formula** in the pic in such a way that if you get 5v input at analog pins it shows you 440v.
use the higher resolution of adc for accurate readings.
hope this would helps you making the theme
Best reg

Microcontrollers :: 26.05.2011 01:52 :: cool.man :: Replies: **6** :: Views: **1924**

Impedance matching by inserting a transmission line with different Zo is not much different compared to conventional stub matching.
A special case is for quarter wave length, were the inserted impedance can be seen as a mirroring point in a smith diagram as Zx= √(Zin?Zout)
General **formula**:

RF, Microwave, Antennas and Optics :: 18.10.2011 18:08 :: E Kafeman :: Replies: **6** :: Views: **938**

Do you have feedback on your **design**?
If you don't have feedback for controlling switch then you don't hope that your output will be stable (it is depended to it's power, if you consume high current your voltage drop P=V*I).
Also I think it will be dependent to your device specifications.
If you had feedback then it try to modify and correct y

Analog IC Design and Layout :: 10.05.2012 01:05 :: dv_sa559 :: Replies: **3** :: Views: **305**

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