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235 Threads found on edaboard.com: Ferrite Core
hi everybody. my project use the push pull amplifier, working in 1-30MHz. I using ADS and had some FET model, but i can't know how to build transformer ferrite core model. 1.can you show me how to build it and the manufacturer ferrite core are often used?? 2. a my friend gives me a noname ferrite (...)
The two ferrite cores have to be held together for the transformer to work. The tape could be holding them or the tape was used to hold them together while the glue dried.
Hello, We are doing a 60W isolated offline flyback (120W peak). We are using an ETD44 ferrite core with 1mm gap. The transformer winding company say that they cannot glue the ETD44 ferrite core halves together because it is not a robust method of adhesion. Is this true? They tell us that they must instead use the (...)
The N87 material data can be found in the first part of the ferrite data book. You can also use the Epcos ferrite calculation tool to estimate core losses. 350 mT is below saturation but involves huge core losses. Question is about switching frequency and duty cycle of peak load. If it's more than a few percent, the (...)
hello I want to design an electronic circuit charger for Laptop from 12 to 19 volts , i want using DC-DC chopper with ferrite core , how can calculate L,H,turn,length of wire and wire clip ??
More information required: Switching frequency, ripple current. Up to 10 or 20 kHz, laminated iron is suitable, for higher frequencies, ferrite cores are suggested.
How did you model the feed line? Did you try to isolate the feedline in real measurement? - - - Updated - - - No. I'm talking about the cable effect, as discussed e.g. in this thread An asymmetrical feed line becomes part of the antenna and changes S11 and r
The core losses are specified with the general sifferit material data, e.g. N87, not the individual core data sheets. I don't have the documents that are relaunched under the TDK brand, but I presume they still have the information that was previously available. There's also the ferrite calculation tool.
Hello, On page 51 of the following (below) document concerning the ETD ferrite cores, the table in blue shows two values of the ?AL? parameter. (?AL? corresponds to the ?allowance? of the ferrite core material). One value appears to suggest that AL is 4000 when measured at 1KHz, and the other figure for AL is 5760, and (...)
Please, can any body help me with edt-5901 data concerning power rating,ferrite core
Hello everyone, I need a ferrite core no. with small air gap which can deliver 50Watts @100KHz, It must be common and easily available. i'll use it in a forward converter. Hi --BawA-- Have a look through this thread ( read it from it's first page till the latest page , you'll catch what you're looking for and more . ) www.ed
They operate at high frequency (in several KHz) , and uses some magnetic elements like ferrite core, so EMI would be an obvious issue , but this issue can be mostly addressed if the proper layout routing rules are followed , like shorter and wider traces, avoiding right angle traces etc Use of Decoupling capacitors on Vcc pin of IC is also a good p
I have used 17 wires in parallel to make make a litz wire. what is Lm ? btw i have got Bmax as 1800 G. I suggest you use this although it does not have torroids, it has all the calculations for ferrite materials and different
i have deployed irf540 x2 with a ferrite ee core ee core is 30mm x 6mm i hand wound the eecore with primary 12turn ct 12turn sec 180turns ...took idea from here i just made the stepup ckt error in ckt i correct
A ferrite cored transformer works best at medium frequencies and certainly not DC so you need to convert your 5V DC to at least 5V AC at maybe 50KHz before the transformer will work. It can be a difficult topic and not easy to explain in a few words. Do some research on SMPS (Switch Mode Power Supply) for ideas on how it works. Brian.
Single balanced mixer uses only one transfomer. DC saturation of ferrite core will only change inductance of windings. Mixed signals are producing much less change in magnetic density of core than DC current in separate winding can do. Signals are practically always in linear part of magnetic curve although it's slope is changed.
just a suggestion use you first method or use this equation TURNS RATIO = Sq Root(Rin/RL) = 2.04:1 in your case then as you frequency is 500Hz, use a ferrite core ring. T400, may be. or a yellow instead of red core (refer to the ferrite core manufacturer Data sheet for the best choice) and wind you (...)
Hi, I need help on ferrite core transformer design. I want to use TDK PC40-EE55/55/21 core. So please any body help me to calculate number of turns against 20Khz full H-Bridge drive.
I presume you have an idea about the block diagram of the inverter. To use the ferrite transformer for battery charging, you need to feed the high voltage winding of the transformer with a 50 kHz AC voltage. How do you chop the mains voltage (probably after rectifying it)?
Please suggest some good sites or tutorials for magnetics design like power inductor design , transformer design , core selection guide for ferrite as well as laminated core. Hi Rajnaveen I highly recommend you to read the thread which comes in below , from first page up to the latest page :
If no other interference effects are being perceived on each board circuitry itself, means the path of magnetic flux field is well confined on ferrite core, therefore mutual coupling between inductors placed at neighbor boards could be presumably negligible, in theory. Anyway, it´s quite important to know the exact location of logic/magnetic ma
The detector diode does not have a load because crystal earphones do not conduct electricity. All the crystal radios on the internet have a 47k resistor as a detector load in parallel with the crystal earphones. 12.5MHz is shortwave. The coil is usually 10 to 20 turns on a ferrite core (your air-core coil is for 80MHz) and the capacitor in (...)
I am designing a 50khz transformer with following specifications 0.2 Tesla circular ferrite core 15 volt 500ma can anyone say the core where i can get with these specifications and also please tell me the where can i find the sheet that gives core area and window area for 0.2 t ferrite (...)
Epcos has the ferrite Magnetic Design Tool to support the calculations
Why we cannot use ferrite Material core for 50Hz application instead of Laminated cores? Who told you can't? It's pretty possible, but not reasonable. You simply have to calculate number of turns according to a meaningful Bmax value. Because Bmax of ferrite is about 1/4 of laminated iron core, consider a (...)
it surely can't be powdered iron in a 70KHz smps? It "surely" can, review e.g. Magnetics data sheets. If you're not colour-blind, you should recognize the difference. Powder cores have a slightly brownish or "warm" grey shade, opposite to black til neutral grey ferrite. It should be noticed that an E-core isn't magnetically optimal
Hello, Basically, I want to build a two stage buck converter as a charger for a (solar) battery string. 104767 I want to build those two inductors using some torroidal iron powder cores. I still didn't finish the calculations so I wonder if there's any problem if I'll buy some larger torroidal cores as theoretical
Hi, I'm designing a miniature 100mH inductor, the external diameter of the inductor is limited to 3.6mm, the length could be 20-30mm, resistance should be less than 240 Ohm. The operating frequency is between 10..30 KHz. The coil should have closed magnetic field lines to avoid interaction with external objects / fields. At the moment I can'
Can you imagine a reason why it shouldn't be possible? Apart from this general point, N27 isn't particularly "high frequency" ferrite, rather dedicated for power transformers, predecissor of N87 etc.
Hello All, I am building a Pure sinewave Inverter.Now, when I connect my dc-dc converter to the drains of my full bridge inverter (SPWM section) my ferrite core tranformer begins to make a sound and then after a little while I see smoke coming from it. What could be the problem? I was wondering if it could be the LC filter at the output of the
Break a spare one in half and leave it exposed to humid air; ferrite is nearly inert (black oxide), powdered iron will rust somewhat on the freshly broken faces.
Hi, I want to plot the Hysteresis curve of a ferrite base on Jiles-Atherton Model using java. From ferrite manufactuerer's datesheet, I can get the parameter Bsat, Hsat, Hc, Br, ui. How can I apply the parameters to obtain thouse parameters Alpha, Ms, a, k, c of Jiles-Atherton Model ? Regards, rocky
How to choose the core(powdered iron core or ferrite core) for filter inductors(Differential mode inductors and common mode inductors) in EMI filter design? Please guide. Thanx in advance.
Loop the motor wires through a ferrite core with as many turns as you can, with .1 MF capacitor each side of it between the wires. Also connect a .01 MF capacitor directly from each brush holders to the motor frame. Make sure that the motor circuit wiring (high current) goes directly to the battery (it should be twisted). Any low power wiring (rece
Hello, Here in MaryLand we have to make a 9uH inductor which will be used in a 650W, 200KHz, CCM boost converter. The inductor current is triangle between 47 Amps and 42Amps, with around 45 Amps RMS current. We only have the PQ40/40 ferrite core set so far, but is there any smaller type of ferrite formers which are used for inductors (...)
Hello, I am working with 180W , 36V, 5A rating forward converter, i am facing problem with resetting the core using Reset winding. i have used EE42/21/15 ferrite core, primary turns is 25, secondary turns is 30, reset winding turns is 25, auxillary turns is 3. i have use RG2 fast recovery diode having 100ns RR time(trr). 10256
Hello, Is it ok if my LT3791-1 pwm controller is sat right underneath the power inductor of the boost converter? Its 650W, and vin = 18V , vout = the inductor is on the top side of the PCB, and the controller is on the bottom side, right beneath the power inductor. The inductor is in a PQ40/40 ferrite core set. PQ series ferrite c
No, litz wire won't provide any real advantage at VHF. Coaxial transmission line transformers are probably your best bet, and 61 ferrite is a good starting material. Low permeability powdered iron mixes like 17 are more suitable for high-Q inductors, and wouldn't make for a very efficient transformer. Plus I don't think anyone makes powdered iron b
Pls guide me to design footprint for ee1304 vertical 10pin bobbin for my ferrite transformer..... I am new to eagle...........
A reasonably designed resonant inductor would either use an air gap (ferrite core) or a low to medium pearmeability powder core, which has acceptable temperature drift.
Hi, i want to design a 3.3uh inductor design using drum core (10*12),as an output filter in my smps, can anybody help me????
The question is if you actually need the non-linear core model for your simulation. It would be the case if you want to model saturation effects or magnetization losses exactly. I noticed that the magnetic.lib shipped with Pspice contains only ferrite cores. Here's a simple silicon iron core model that I used for some (...)
I have designed an inverter based on smps. In the ferrite core transformer there is an auxilary winding to provide 14VDC regulated after rectification. I want to power up all the ICs from that 14VDC . Till now i am using battery to power up the ICs but the problem is battery voltage is not constant varies from 10V to 13.5V how to toggle fro
...Another thing is to know that iron core is more flux attractive or ferrite core? Selection of core material depends on range of signal frequency. If applied on low frequency ( mains, audio ) the best choice is iron, but above some KHz ( particularly on power switching ) ferrite becomes best suitable. (...)
hi someone refer me any ferrite core and ferrite transformer seller in bangalore...... in sp road if possible
Hello, A nice measurement is the low frequency BH curve. The basic setup is relatively simple, but you need some math to convert the measured properties back towards magnetic field properties. You can find an example measurement setup at: If your Digital Oscilloscope has int
Hello, Can you confirm that in a 15W offline flyback, the hysteresis losses can be reduced significantly by slightly increasing the size of the ferrite transformer's core? B=phi/A ...therefore, with "A" being bigger, the flux density will be lower in a bigger core, and thus the change of flux density throughout the switching cycle will (...)
We've got a Maxwell license and I am trying to simulate the ferrite (YIG) core with nonuniform magnetization. I just don't get how to do it. In HFSS on microwaves I set ?HFSS=1, because actually \hat{\mu}=\mu_{HFSS}\cdot\begin{bmatrix} \mu_\perp(f) & j\kappa(f) & 0\\ -j\kappa(f) & \mu_\perp(f) & 0\\ 0 & 0 & 1(\mu_{||}) \end{bm
This Balun of course can work at lower frequencies down to DC but Amplitude and Phase balance can not be maintaned at those frequencies.These are limits of a Balun that is restricted by electromechanical specifications of ferrite core. Look at this component.
Dear members, I have designed full bridge rectifier for pure sine wave inverter using microcontroller and IR2110. I have given 12 V to ir2110 . in start i give 12 V DC to drain of mosfet , worked well with good sine wave , then i have increased voltage to 30 V and then to 60 V , everything fine ( good output sine wave ). Then i have tried to give