Questions tagged [transformer]
A transformer couples two or more AC signals through a magnetic field. Often used as galvanic isolation and to transform one AC voltage to another.
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replace 220v transformer into a 110v transformer with same specs [closed]
I am trying to convert my European 220V VOX AD50VT guitar amplifier into 110V to use it in the USA. I plugged it to 110V and it does not work, there's just the master light that comes up but it ...
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Two switch flyback converter MOSFETs voltage stress
I am exploring and experimenting the two switch flyback converter. I have a doubt, in this two switch flyback converter configuration, two MOSFETs are connected in series with sandwiched primary coil ...
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100 kHz Class D Amplifier with out Transfomer
I have to design a class D power amplifier, able to deliver 200 W on 50 ohm load at 100 kHz.
Power supply should be 14 or 24V, I don't know at the moment so I need an output trasformer.
I did few ...
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Battery Charger - Design of Circuit
Im Designing a Lead-Acid Battery charger, dont't needed that this charger it's the most sophisticated one.
As you can see in the attached image, It only consist of a power transformer, a ...
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Question on orientation [closed]
I have a question on the orientation of this part.
My question is:
I have a 3-phase, 4-wire system. R,Y, B & Neutral.
So, I have the above 4-wires passing through the hole(core) of the transformer ...
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Polarity on Current Transformer
In this part,
What is the correct way of orientation? In which pin should I give the input signal? Should the current flow from P1 to P2?
Please let me know the correct orientation and how to find it....
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Push pull transformer winding
This is the first time that I wind a transformer. I follow a tutorial on web and I got this calculations:
Specification:
Vmin=12V , Vmax=15V, Fs= 100kHz, P= 7.5W Core= EP7
Results:
Np= 5 + 5 and Ns= 6....
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Transformers in parallel
I Have an issue with an electric gate motor, it originally had a Toroidal 250va 13.5V.
Naturally this is an unusual sized transformer and the space allocated makes a replacement difficult.
The Unit is ...
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How Much Cross Sectional Area Should Transformer Core Have Given Current and frequency?
I'm a VHDL guy for work and tinker with power electronics on the weekends, so please forgive if this question is dumb.
I'm designing a transformer with a large step down ratio. In case it matters, the ...
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Find the area product of a core
I need assistance in solving this question. I am confused as to what formula to use to find the Ap, as i searched and found that there many differen variations to find Ap. I need the Ap to be in cm^4. ...
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NST Tesla Coil Spark Gap Not Sustained [closed]
I'm currently building a Tesla coil using a 12kV, 30mA NST (from the late 80s I think) and a rotary spark gap in parallel with the output. I'm also using an MMC cap bank in series with the primary. I'...
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12v Halogen Wire lighting - Convert to LED [closed]
I purchased a house that has a really cool 12v halogen setup where two wires are suspended across the ceiling in two different locations, and each of which carries four 50W halogen bulbs. Each has a ...
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Can a bucking transformer get "high on its own supply"?
There's a lot of industrial 277V in North America that's a few volts too hot to support level 2 EV charging. It just needs to be knocked down to roughly 240V, and that's not that hard to do with a ...
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High current, low voltage pulsed DC transformer
I'm trying to understand the feasibility of a DC transformer that takes a low voltage, high current pulse and converts it to a lower voltage, higher current pulse (with a resistive load on the output)....
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Single phase and three phase delta connection wiring diagram
I would like to verify whether my answers to the provided questions are correct for the wiring diagram I will be creating. Thank you
Edit: This is the given example to us. So is it safe to assume ...
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Can a 600V->208V transformer become a 600V->240V transformer by shortening the secondary coil?
If I have a 3 phase 600V to 208V step down transformer, can I shorten the secondary coils to turn it into a 600V to 240V?
In theory it seems as it should work:
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Sense induced current in coil near AC mains 240 volt
My heater has no indicator to let me know that its switched on and using power. Sometimes I forget that its switched on. If I (safely) put a coil near one of the conductors (away from the other ...
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How to select transformer
I want to design a flyback switch mode power supply.
I used WBench from TI.
I inputted my specifications and I got this for the transformer.
How do I use this information to choose an off-the-shelf ...
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Phase of Current and Voltage on Primary Side of Transformer
I don't really understand the workings of a transformer and how the voltage and current on the primary side can be the same phase.
As far as I understand, a transformer is two coils that are connected ...
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How bad of an idea is it to use an AC transformer for a DC-DC converter?
I primarily do VHDL for work, so please forgive if this question is dumb.
I started teaching myself PCB layout and am using a buck converter as the application. I want my buck converter to handle 50 W....
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UL ratings and power supplies (DC transformer)
I read somewhere that if you sell a product that you plan to be UL certified, this means its power supply must be UL certified as well.
This means that if you supply power via a transformer (external ...
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Why we use constant value of magnetic flux in transformers
I have a confusion regarding the formulas of the transformer. I have seen in many places people using a constant value of the flux B in the transformer equation:
turns per volt=1/(1.44 x Bmax x A x f)...
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Parasitic Oscillations
I'm designing an LLC converter circuit. I've conducted simulations, but I have an issue. When I perform switching below the resonance frequency in the LTspice simulation, I observe parasitic ...
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Magnetics part with and without auto-transformer
I have 2 magnetics part.
One magnetics is this (Circuit A configuration magnetics) & the other magnetics is this
When I use the Halo part, the ethernet link is not up. But when I just replace the ...
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Supply of the primary side of the transformer in a forward, half-bridge converter
Why is it that in most forward, half-bridge converters, one of the transformer windings is connected with two capacitors (to VCC and GND):
when my simulations shows that one capacitor (that block DC ...
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Is there a difference between laminated steel for transformer and inductor?
Does a material (compounds) of laminated-steel core varies if used for transformer vs. inductor. Both for 50Hz. Also is there any other differences?
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How does this transformer or autotransformer work?
I came across what appeared to be a transformer. Someone non-electrical said it is a autotransformer. What does this mean and how does it work?
If I apply let's say 50V AC @ 10A on terminals 150 and 0,...
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Do corner-grounded deltas exist outside of USA?
Do corner-grounded deltas exist outside of USA? If yes, where?
Where do you find information about this? Is there an IEC standard that dictates which transformers exist where?
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I would like to know how to set up transformers in Proteus program [duplicate]
I would like to know how to set up transformers in Proteus program.
I want a transformer rated 220VAC 24 0 24.
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Transformer-coupled low noise amplifier
A rather common way to make a low noise amplifier with an equivalent input voltage noise density in the range of ~0.1 nV/rtHz, is to take a FET and place a step-up transformer in front of it.
I have ...
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Calculation of Power Transformers
I'm calculating transformers very roughly, with some approximate equations that I found on the internet, they are working perfectly but I'm supposing that they are oversized... They are power ...
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Flyback vs. Coupled inductors vs. Transformer?
So I am in the process of making a high voltage power supply and after a failed attempt at using a modified MOT and difficulties finding a flyback transformer, also difficulties understanding how they ...
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How does a starter transformer work?
I am searching about chargers that are specifically for starting forklifts and other things that require, say, 12V-24V and 20A-80A. They have lead-acid batteries.
These starters have a switch for 12V ...
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Modified microwave oven transformer for step up, is it viable?
So basically I need a 600V output from a 12V supply. I have a pulsed DC voltage (square wave) on the primary and I'm using the old MOT primary as the new secondary. I've calculated the secondary (old ...
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Reducing the size of magnetic components
I read some documents and papers and found a couple methods to reduce the size of magnetic components.
Recycling the energy stored in parasitic elements such as transformer leakage inductance, ...
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Flyback converter design using UC3843
I am designing a offline power supply which will 24 V as output with 2.5 A. I found UC3843 as better option. I used TI we bench tool to design my power supply. This is the schematic I got from it. The ...
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Dim a 158V DC Led
I bought a led lamp and it's too bright. When I saw the converter, it's not a standard 12 or 24 VDC one. it's a 120-215 VDC; Picture attached. I didn't trust that. Borrowed a multimeter and checked, ...
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Does transformer saturate at very low frequency if there is no applied current?
I have been concerned about an issue I have seen with an LLC resonant transformer I have been designing in a pulsed power application. The core is designed to avoid saturation at the maximum applied H-...
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Old car patrol light
One of my friends has a car patrol light. He wants to use a transformer to supply power. This light has two lightbulbs, 50 watts each. The front light is red and stays on, on the opposite side is an ...
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ZVS not working and doing weird things?
I recently made a simple ZVS circuit using 1w 15V zeners (BZX85B15-TR) , UF4007 ultrafast diodes, IXFH36N60X3 Mosfets, the capacitor consisted of a 3S3P setup with each cap being 680nf 250v film caps, ...
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Which is the correct diagram to obtain only a 240 V secondary output from a 480 V primary for a transformer rated at 480-240/120 V?
I know the answer I just wanted to know what A, and C were if I put my meter across. Could someone also show me where I'd put my meter leads? Or if those are dud/fake transformers.
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What phase transformer is this? How do I calculate the FLA for this kind of transformer?
I am trying to calculate the Full Load Amperage for this 150 kVA Transformer so that I can appropriately size the fuses for it.
The transformer is being supplied by two connections to a 3 phase system....
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An AC motor is a transformer? How?
motivation:
A guy I worked with years ago (~2015) who is an EE said that "an electric motor was just another form of a transformer". I'm not an EE, so I didn't do things with transformers. ...
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LTspice transformer not working as expected
I made this ZVS circuit on LTspice and want to make high voltages with it. The ZVS circuit does work fine and output high power but the transformer I made doesn't work fine. I want x400 step up which ...
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What actually constitutes a turn on a transformer coil?
Quick background on myself: I work as an engineering tech at a company that manufactures instrument transformers. I assist our technical director with designing transformers, however I do not have an ...
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Useing a PoE RJ45 ICM Magnetics but not using it for PoE?
I plan on using the Bel G27-122T-015 (PoE ICM RJ45) but I don't need it for PoE. Can I just leave these pins unconnected? The ICM already has an internal Bob Smith termination.
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Can a control transformer output more real power than its VA rating when overloaded?
I'm not looking for critique on what I'm doing that has me asking this question, but I'm slightly confused by the definition of the VA rating on control transformers, specifically a 2kVA transformer ...
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I need to replace an old Basler AC Transformer. I can't find a replacement. How do I determine what to replace it with?
It came out of Payne Central AC PA10JA042000ADAA. I tried emailing Basler - no response. Any help would be appreciated. I don't want to replace the whole AC unit for a bad part. Some numbers from ...
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Transformer that doesn't take power when not used
With Is this (working) 2-doorbell system dangerous? and Why is it impossible to connect these two doorbells in series or parallel?, I arrived to the conclusion I need a new 220 V AC => 10 V AC ...
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Is this (working) 2-doorbell system dangerous?
In a previous setup, I had two doorbells, each one with its own 10V AC transformer, as detailed in Why is it impossible to connect these two doorbells in series or parallel?.
I now know it was ...
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