288 Threads found on edaboard.com: Ferrite Core
you need to get datasheet of the ferrite........few softwares will know what ferrite you they wont be able to assess your core losses.
2....dont overheat core with core loss
3....use enough strands to avoid skin effect problems
4....Proximity mindful of it
Power Electronics :: 02-26-2017 18:56 :: treez :: Replies: 2 :: Views: 369
I am winding a ferrite core inductor . To have an airgap of around 0.8 mm, I put a piece of paper between the centre leg of 2 E cores. (core used is EE19/8/5) Is it a feasible method to have the air-gap?
How to join / glue ferrite core halves for winding the ferrite (...)
Analog Circuit Design :: 02-22-2017 03:08 :: abhishek.2138 :: Replies: 11 :: Views: 657
GWDBSUCCESS i have posted an LTsice simulation of an offline flyback that uses your transformer. Just convert from.txt to .asc, then open in ltspice, then hit running man icon.
Also posted is excel design doc.
The datasheet you attached does not give the ferrite type so you cannot calcuate the core you will have to do thermal measurem
Power Electronics :: 02-17-2017 23:49 :: treez :: Replies: 5 :: Views: 529
thats a switching mode power supply circuit and I guess its a fly-back type (I see pc817 optocoupler).
the transformer is ferrite core switching transformer with two output winding
the transformer is specially designed for that circuit
you can find design information in switcher IC datasheet or application notes
Power Electronics :: 02-08-2017 06:02 :: hamidmoallemi :: Replies: 1 :: Views: 349
This is a components of Micro Wave Oven see the connection diagram
Next pictures are ferrite core filter, It is a common mode filter (feed through) for high frequency filtering application.
Service Manuals, Requests, Repair Tips :: 01-31-2017 11:00 :: smijesh :: Replies: 4 :: Views: 529
So could I use this circuit and adjust the frequency to 60khz?
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So by changing the capacitor connected to 6 and 2 I could get a higher value and by adjusting
Power Electronics :: 01-24-2017 11:16 :: Enzy :: Replies: 54 :: Views: 3188
Hi these are ferrite core transformers that are used in switching mode power supplies.
you cannot use them as 50Hz transformer, they are designed to be used in high frequency switching mode supplies with a switch controller IC
they are designed for specific circuit and not general ,
forget about them!
Microcontrollers :: 01-22-2017 06:16 :: hamidmoallemi :: Replies: 3 :: Views: 433
Our SMPS manufacturer says that they used an "EF13" core in the SMPS that they designed for us.
I cant find any trace of such a ferrite core shape.
Do you know of an EF13 datasheet, where i can find it?
Power Electronics :: 01-09-2017 22:22 :: treez :: Replies: 4 :: Views: 490
ferrites are ferromagnetic oxydes, ferrite cores are sintered like ceramics. In so far I don't see where epoxy or silicone resin comes into play.
RF, Microwave, Antennas and Optics :: 12-29-2016 18:01 :: FvM :: Replies: 4 :: Views: 344
Power inductors need air gaps, gapped ferrite toroids are rather unusual so you can safely assume that the API toroid chokes are powder cores. According to other datasheet comments I expect a xx-iron alloy, similar to other major powder core vendors.
I wonder if API provides meaningful data on request, or if all customers are working on a (...)
Power Electronics :: 12-13-2016 08:21 :: FvM :: Replies: 5 :: Views: 452
In which mode ferrite core Power Inductor inductance is measured? There are two modes in my LCR meter labeled SER and PAL. And what is the difference?
Power Electronics :: 11-21-2016 05:56 :: adnan012 :: Replies: 2 :: Views: 358
i am getting confused wile selecting a right core from the available Manufacturers.
i am having a book of "CALONEL MACLYMAN" on dc-dc converter with design Example.
i ended up with the design Results in terms of Transformers and inductors but i am only getting the Old cores of Magnetics only.
i dont have classification of o
Power Electronics :: 11-20-2016 12:37 :: Bjtpower :: Replies: 14 :: Views: 758
the part about power supplies for cars was just to gain some knowledge I never built a car amp before, I normally build amplifier and use 110v and a transformer with a linear regulator but its very hard and expensive to get good transformers to build those types of power supplies so I wanted to learn about switch mode.
your saying building a power
Elementary Electronic Questions :: 10-22-2016 00:38 :: Enzy :: Replies: 26 :: Views: 1573
Just a guess without all the information....
The diagram looks like it has a ferrite core so it is probably intended to be used at a pulse frequency of >10KHz. What frequency are you driving it with?
Even with lower primary current you should get considerable voltage across it's output.
Power Electronics :: 10-24-2016 18:10 :: betwixt :: Replies: 10 :: Views: 547
Very high power density can be achieved with tape wound amorphous metal toroid cores. There are also large ferrite and powder core toroids available. But toroid transformer design is involving a considerable manufacturing overhead compared to regular winding geometries.
Power Electronics :: 10-04-2016 06:25 :: FvM :: Replies: 25 :: Views: 1681
Label your dimensions per this drawing.
Just to make sure this is a ferrite core and not a iron core?
Power Electronics :: 10-02-2016 02:16 :: FlapJack :: Replies: 6 :: Views: 702
For a common mode choke I will prefer ferrite core,
If a differential/Output inductor go ahead with Powdered iron.
Powdered iron core available in Magnetic inc
If it is PCB integrated, should take care of rated current in the track
Power Electronics :: 08-27-2016 12:25 :: smijesh :: Replies: 1 :: Views: 269
Isn't it obvious that for low frequency power transfer the coils must be very close together or touching each other, have many windings and have an iron core and for high frequencies have a ferrite core?
Does a simulation program know anything about that?
What is CST (Central Standard Time?) and what is MWS (Medium Waxed Shine?).
Power Electronics :: 04-20-2016 14:29 :: Audioguru :: Replies: 3 :: Views: 1230
Hey , so I finally finished my smps which is a half bridge driving two IGBT's , all seems well , the IGBT's are barely warm etc but the transformer is getting hot even under longer periods of light loads.
The wires are not how they are simply warm and even could be that way because the core is giving off heat , the part that gets hot is the ferrit
Power Electronics :: 06-19-2016 07:53 :: Salvador12 :: Replies: 18 :: Views: 990
The inductance value seems factor 5 higher than usual.
To make an inductor with sufficient saturation current, you'll either use a gapped ferrite core or a powder core which has a built-in distributed air gap.
I presume that you won't like the core loss level generated by powder cores at 600 kHz, (...)
Analog Circuit Design :: 05-13-2016 15:41 :: FvM :: Replies: 3 :: Views: 426
There are online calculators for smps.
It's a frequent topic here. See the list of related threads at the bottom of this column. Or do a forum search. Example, buck, boost, buck-boost, flyback.
I dont know how to build the transformer
Many find it is easier to start with a ferrite core, of a size rated to store the required ene
Power Electronics :: 05-09-2016 15:44 :: BradtheRad :: Replies: 3 :: Views: 546
Closed i know but...some would say dont bother fussing to cater for the transient case of "max vin AND max duty cycle" occurring together...just put a small 0.2mm gap in the ferrite core, and then the onset of saturation flux density will be more gradual and more easily catchable by any overcurrent limit.
It is that "Nuisance" case of "max vin A
Power Electronics :: 04-28-2016 15:24 :: treez :: Replies: 3 :: Views: 383
Your datasheet is a simple inductor rather than a transformer. A buck converter normally has an inductor with a single winding.
To find specs for making your own inductor, there are online calculators. You can purchase a ferrite core. Or, a DIY-er might make his own steel-particle slurry by cutting up steel wool and mixing 50-50 with silicone.
Power Electronics :: 04-19-2016 15:33 :: BradtheRad :: Replies: 4 :: Views: 716
i'm designing dc dc converter for 40kHz PWM freq. and ferrite core transformer is 250uH will it support ??
Power Electronics :: 03-16-2016 06:51 :: kiransbaddi :: Replies: 4 :: Views: 565
Is an air coil better in terms of temperature stability, as compared to a ferrite or powdered toroid?
RF, Microwave, Antennas and Optics :: 03-08-2016 22:19 :: neazoi :: Replies: 5 :: Views: 488
Carrier frequency of the shown power line remote control is 100 kHz rather than 315 MHz. But the coupler could be basically designed similarly. You preferably operate the transformer in resonance. Air core or open ferrite core with a very few windings. I presume you know basic LC resonator formulas (or can review it on the internet).
RF, Microwave, Antennas and Optics :: 02-19-2016 14:25 :: FvM :: Replies: 6 :: Views: 754
It's either a tuned circuit or a tuned transformer inside a metal screening can. The component betwen the green arrows is a ceramic capacitor. The screw on top moves the ferrite cap up or down a plastic core to adjust the inductance and hence frequency it is tuned to. The can style is standard, probably either 7mm or 10mm square but whether it is
Hobby Circuits and Small Projects Problems :: 12-20-2015 21:16 :: betwixt :: Replies: 1 :: Views: 474
I Assume your using a ferrite core for this transformer?
Why not just use a few smaller diameter pieces of Enameled Magnet wire, twisted together to make your own Litz wire?
Elementary Electronic Questions :: 12-03-2015 15:11 :: chemelec :: Replies: 6 :: Views: 625
Operating a ferrite EPP core pulse transformer in a 170 degree ambient is too hot for ferrite? (its for a buck converter high side fet drive pulse transformer)
Page 81 gives u vs temperature for N87 ferrite.
Power Electronics :: 12-01-2015 19:12 :: treez :: Replies: 4 :: Views: 534
It definitely looks like a Small ferrite core Transformer and it shows no sign of being bad.
Very Doubtful that is your problem.
Elementary Electronic Questions :: 11-24-2015 15:38 :: chemelec :: Replies: 4 :: Views: 499
Here is a spice model that you can use:
*SRC=Untitled;Untitled;Transformers;;Siemens Matsushita, E19/8/5
.SUBCKT Untitled 1 2 3 4
*Siemens Matsushita, E ferrite, N67_30300K_100C, E19/8/5
** ** ** **
Rdc1 N41 N61 16.83
Lmag N41 2 0.2237
Rcore N41 2 504.1k
Rac1 N61 1 52.30
Lac1 N61 1 97.10u
** ** ** **
Power Electronics :: 11-24-2015 01:13 :: E-design :: Replies: 7 :: Views: 1062
I am trying simulate a ferrite core antenna and coil integrated. but I do not have idea by where start. please can you hel me?
I need know how simulate with CST the ferrite material or how called or I have that create a new material with its own characteristic.
The antenna start up 20 to 200 Mhz.
Electromagnetic Design and Simulation :: 11-07-2015 19:55 :: GuillermoSilva :: Replies: 0 :: Views: 870
We are designing a 3kW LLC converter (battery charger) with Vin=425VDC, and Vout = 400vdc, 3kW. (schematic below)
Please give your opinion on the core losses in the PQ3535 ferrite core that we are using as the LLC converter transformer?
(It uses ferroxcube 3C95 ferrite and is centre leg gapped for an AL value of (...)
Power Electronics :: 11-05-2015 10:10 :: treez :: Replies: 4 :: Views: 879
How ferrite core Effective area (Ae) and Window area (Aw) calculation are calculated?
Attached files have data for E20/10/6 core.
The are is 32.1 mm^2 , how this value is calcualted?
Power Electronics :: 10-29-2015 06:53 :: adnan012 :: Replies: 1 :: Views: 2080
My guess 67 = Epcos N67 ferrite, 25 to 300khz. It has a little more core loss than 3C85.
3C85 ferrite = Feroxcube 25 to 200KHZ.
ETD59 core is a shape not a ferrite.
Power Electronics :: 10-28-2015 23:03 :: FlapJack :: Replies: 1 :: Views: 408
I am trying to find the matching ferrite core all I have is this part number
ferrite core d3,4/l3,2 I am not able to locate it anywhere
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OK, I think it should the following.
Dia - 3.4 mm
Length - 3.2 mm
Power Electronics :: 10-23-2015 03:34 :: samuelr :: Replies: 0 :: Views: 288
I am looking for an example or a step by step tutorial for setting up a low-frequency analysis of a typical switch-mode ferrite material transformer. I am, in particular, interested to extract core and copper losses in the results.
There are many examples of other types of problems with CST Studio but after searching for days on Google and YouT
Electromagnetic Design and Simulation :: 10-06-2015 02:15 :: E-design :: Replies: 0 :: Views: 537
But the coil will have interwinding capacitance and a Self Resonant frequency, so you will care and what frequency you choose and what losses you have.
Skin Effect losses increase with frequency. ferrite core losses increase with frequency
But coupling losses reduce with rising frequency where the gap must be < diameter and gap losses reduce with
Power Electronics :: 10-02-2015 20:42 :: SunnySkyguy :: Replies: 15 :: Views: 1063
This is due to the flux skin effect on the steel core, causing a large drop in permeability.
ferrite has an insulative binder between metallic particles and thus capable of higher currents.
Power Electronics :: 09-15-2015 06:17 :: SunnySkyguy :: Replies: 7 :: Views: 599
The most widely criterium adopted for choosing the ferrite size is the Ae parameter ( which in the above datasheet is equal to 32.1 mm2 ). You can determine its value by using a step-by-step procedure which can vary a few from an author to another.
Although it is possible to find on the web online tools which do tha
Electromagnetic Design and Simulation :: 09-05-2015 16:42 :: andre_teprom :: Replies: 6 :: Views: 855
the core clamping parts on pg 288 are made of brass, and are virtually "in" the ferrite, so they will surely suffer much eddy current heating?
Even if some heating occur there, should be due to the Foucault currents, which are strongly dependent on the width of any rod or screw placed inside the ferrite hole. Anyway
Power Electronics :: 08-31-2015 18:05 :: andre_teprom :: Replies: 10 :: Views: 837
We are doing a 7.4kW Full bridge LLC converter. (vin=400VDC, vout = 300-410VDC).
Please advise if we are overheating our transformer?
We are using a PM87/70 ferrite core (Epcos) for the transformer (N87 ferrite).
We have a 0.4mm gap in the centre leg of the transformer, which we calculate gives an AL value for the gapped (...)
Power Electronics :: 08-22-2015 11:10 :: treez :: Replies: 3 :: Views: 727
As you know, N87 ferrite can run up to well above 100degC?...
(as attached, from the Magenetic Design Tool download of Epcos TDK)
Power Electronics :: 08-16-2015 11:06 :: treez :: Replies: 7 :: Views: 874
EPCOS ferrite tool ends up with Bmax of about 275 mT for 40 kHz full bridge with PM62 core, based on 25 K core loss induced temperature rise.
Power Electronics :: 08-03-2015 21:46 :: FvM :: Replies: 31 :: Views: 2484
We wish to use a PM core by Epcos for a switch mode transformer. These only come with ferrite materials N27 and N87.
We are doing a full bridge converter, 2kw, vin=380vdc, vout = 360vdc.
The Epcos ferrite databook does not specify what is the permissible frequency range of these materials.
Do you know what it is?
Power Electronics :: 07-30-2015 12:25 :: treez :: Replies: 5 :: Views: 613
The ferroxcube Soft ferrites databook does not state which ferrites are best for use at which frequency..
Ferroxcube soft ferrites databook:
I am making a Boost PFC inductor for 70KHz operation using a PQ core. It can be in materials either 3C81, 3C90, 3C91
Power Electronics :: 07-21-2015 18:34 :: treez :: Replies: 1 :: Views: 745
I would like to get started with SMPS design there are lots of application notes with test report available for designing it.
The manufacturer of the Transformer has given only the core type of ferrite core transformer and its dimension
and there is no m
Power Electronics :: 07-19-2015 14:25 :: yogece :: Replies: 5 :: Views: 880
I have designed and implemented the flyback transformer using the EE30 ferrite core and the switching frequency is 20kHz, no switcher IC has been used and i am just driving the mosfet irf630 at 20kHz using gate driving IC ir2110 and gaing signals from PIC16F616. The converter was designed to give output voltage of 25V at
Power Electronics :: 06-30-2015 10:21 :: red_alert :: Replies: 4 :: Views: 865
Hello, I hope this is the right forum to ask this.
I am attempting to find the datasheet for the ferrite core SFT-59SN from TKK industries.
It seems a rather popular item, according to the references found on the internet, but the datasheet is nowhere to be found.
Does someone has it, or can at least give me some characteristics (e.g. core (...)
Electromagnetic Design and Simulation :: 05-22-2015 11:14 :: kalbun :: Replies: 1 :: Views: 1933
Knowing the frequency will make it easier to guess the AL. You wont be very wrong if you get similar size core that is made for power transformers, most materials are about the same.
Au contaire, @vbase each supplier has at least a dozen types out of a thousand different mixes of ferrite.
for example TDK have hundred
Elementary Electronic Questions :: 05-11-2015 14:32 :: SunnySkyguy :: Replies: 8 :: Views: 1081