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288 Threads found on 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. Generally...make sure 1...dont saturate 2....dont overheat core with core loss 3....use enough strands to avoid skin effect problems 4....Proximity mindful of it
for the air-gap , inserting a paper can also be employed . Provided the thickness of the paper is equal to your designed air-gap distance. varnishing is not necessary. What is that parameter that is not met when you say 'of not getting desired reults?' Gluing can be carried out with loctite adhesive or any similar one (any acrylic or epoxy
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
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
Hi Venkates This is a components of Micro Wave Oven see the connection diagram 135805 Next pictures are ferrite core filter, It is a common mode filter (feed through) for high frequency filtering application.
When I wrap the transformer for the spec 24v to 400v if I actually vary the pot in the circuit to change frequency won't that change the voltage also, I'm not sure what will happen at such high frequencies if it would damage the transformer or a low enough frequency won't damage a ferrite core like for example 1khz, what if that's the minimu
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!
Hello, 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?
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.
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 (...)
hi, 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?
I guess "Magnetics" refers to powder cores. They can be considered as cores with built-in gap, so alternative ferrite cores will usually need a gap, at least if they work in an inductor or flyback transformer. Parameters aren't really comparable, powder cores have larger saturation flux, but also higher (...)
Yes, and the Output can be Either Stepped UP or Down in Voltage. You could also have Multiple Output Windings. Your Biggest Problem is Making a SUITABLE ferrite core Transformer for the Frequency of Operation. Typically it should be wound with LITZ Wire, to better handle the High Frequencies involved.
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. Brian.
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.
Label your dimensions per this drawing. Just to make sure this is a ferrite core and not a iron core?
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
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?).
@andre_teprom , what do you mean "the reel" ? before the core? I didn't understand.The whole core is getting hot but the windings are much cooler than the core if compared, rather strange as I usually have dealt with windings getting warm upon large loads. I was considering the possibility that the transformer a
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, (...)
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
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
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.
hello experts i'm designing dc dc converter for 40kHz PWM freq. and ferrite core transformer is 250uH will it support ??
Hi, Is an air coil better in terms of temperature stability, as compared to a ferrite or powdered toroid?
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). 315 (...)
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
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?
Hello, 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.
It definitely looks like a Small ferrite core Transformer and it shows no sign of being bad. Very Doubtful that is your problem.
Here is a spice model that you can use: *SRC=Untitled;Untitled;Transformers;;Siemens Matsushita, E19/8/5 *SYM=Untitled .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 ** ** ** ** L12 N
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.
Hello, 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 (...)
hi 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?
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.
Hi 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 - - - Updated - - - OK, I think it should the following. Dia - 3.4 mm Length - 3.2 mm
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
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
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.
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
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
Hello, 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 (...)
As you know, N87 ferrite can run up to well above 100degC?... (as attached, from the Magenetic Design Tool download of Epcos TDK)
Hello , We are designing a 1.7kW Full Bridge SMPS transformer using a PM62/49 core by Epcos TDK (N87 material). We don?t want a gap in the core, but I believe We will have to have one because otherwise the change in the ?saturation current? level {I(SAT)} varies too much as temperature changes?. As you know, the effective permeability (ue
Hello, 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? Epcos (...)
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
Hi, 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
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 input of 20V. But the outp
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 (...)
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