703 Threads found on edaboard.com: Ferrite
I have RF amplifier 15MHz , working from DC+50V to 50ohm Load.
N-MOSFET transistor have in drain RF choke.
Choke is toroids OD 24mm Ht 7mm (any as T94) painted on White, 11 turn , I measute L=12.4uH
Question is how type material is used?
I have yet found
RF, Microwave, Antennas and Optics :: 04-01-2017 14:12 :: berger.h :: Replies: 1 :: Views: 469
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: 450
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
Analog Circuit Design :: 02-22-2017 10:14 :: srizbf :: Replies: 11 :: Views: 896
Basically yes, they are an epoxy coated combination of capacitor and ferrite beads (inductors) for supressing RF interference. To DC they usually appear as a short circuit. In the photo I would guess they block interference entering or leaving the board and the red discs are to absorb excess voltage spikes.
Check with Murata, they are one of the
Elementary Electronic Questions :: 02-22-2017 09:13 :: betwixt :: Replies: 6 :: Views: 523
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: 685
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: 414
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: 709
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
Power Electronics :: 01-27-2017 17:36 :: FvM :: Replies: 54 :: Views: 4405
What performance difference is to expect using a ferrite rod or an iron rod as wound transmitting antenna under 100 KHz ?
Would ranges be way different at a given -say 1 Watt- TX power, or not of major concern to reach 100 m distance?
RF, Microwave, Antennas and Optics :: 01-24-2017 01:16 :: Externet :: Replies: 9 :: Views: 1011
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: 544
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: 610
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: 417
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 creati
Power Electronics :: 12-13-2016 08:21 :: FvM :: Replies: 5 :: Views: 539
The first one is probably Wilkinson power divider and the second one seems ferrite based wide-band divider/combiner.
RF, Microwave, Antennas and Optics :: 12-06-2016 20:06 :: BigBoss :: Replies: 1 :: Views: 305
I need to design and simulate a tlt 4:1 (made for instance in microstrip technology) with ferrite sleeve around the microstrip inn 40MHz-250MHz bandwidth. Anyone can help me? If i use ADS i could use the model XFERTL2 and i'd just need to know the inductance without the sleeve and effective dielectric constant of the coupled line, but i'd prefer t
RF, Microwave, Antennas and Optics :: 12-01-2016 11:01 :: molloy :: Replies: 0 :: Views: 380
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: 415
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 losses, it's probably easiest to start th
Power Electronics :: 11-20-2016 12:57 :: FvM :: Replies: 14 :: Views: 1069
In general a series ferrite bead with a parallel capacitor suffices for most cases, but it is just a general tip which could not be suited to some level of ESD.
Power Electronics :: 10-27-2016 18:00 :: andre_teprom :: Replies: 3 :: Views: 502
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.
Elementary Electronic Questions :: 10-23-2016 23:47 :: chemelec :: Replies: 26 :: Views: 1964
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: 664