All Questions
Tagged with dc-dc-converter transformer
66
questions
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Why are these transformer windings used connecting the switch and the series pass regulator in this circuit?
I am looking into this multi-output forward converter and cannot figure why these highlighted windings are connected to the switching side. There's already an inductor to handle the recovery reset. ...
- 11
2
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2
answers
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Two switch forward converter with transient spikes on gate to source voltage - Part Deux
This post is about a similar problem seen in this similar post
This 2 switch forward unit has a 750V input, 72 volt output and was tested at 10 and 15 amps out.
This new board doesn't have the ...
- 41
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1
answer
70
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Forward converter current flow confusion
I am slightly confused about the flow of the current in the forward converter during the turn off time of the MOSFET (when diode on left is conducting) as shown below. Now I am considering that n1=n2=...
- 669
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Why is there a difference between the model primary and physical primary in a forward converter, but not between the secondary or tertiary windings?
In a forward converter, the current through the physical primary winding is the sum of the current through the magnetizing inductor and the current through the model primary winding.
However, the ...
- 57
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1
answer
134
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What is the relationship between the windings in a forward converter?
I'm trying to sketch the currents through each transformer winding of a forward converter. I also need to sketch the current through the source. I have a sketch of the current through the magnetizing ...
- 57
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1
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111
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Transformer design and calculations
I am trying to find correct way of determining the transformer parameters.
I provided a simple schematic of a PSFB (phase-shifted full bridge) converter below.
How do we determine thr primary ...
- 377
4
votes
1
answer
176
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Push-Pull DC converter - resonance in the waveform
I'm building 48v to 200v Push-Pull DC converter.
And now I'm close to finishing the project, but when I checked the waveform on the transformer I discovered that it looks like this:
(on this picture ...
1
vote
2
answers
103
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Core demagnetisation - What is the condition?
Consider forward converter topology.
What is necessary for core to be successfully demagnetised? Does the magnetising current has to reach absolute zero amps, or even little negative is advantage?
How ...
- 1,965
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vote
1
answer
53
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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 ...
- 1,369
4
votes
2
answers
372
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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 ...
- 292
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1
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64
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Can we replace transformer in the DAB converter with some inductor model [closed]
I am currently working on analyzing the behavior of GaN MOSFETs in a Dual Active Bridge (DAB) converter for a battery charging application. The DAB converter requires a transformer for isolation and ...
- 75
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159
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Step up dynamo voltage with transformer
I'm using a 100 turn coil and some magnets to create a 100 mV AC signal from my bike wheel. I need to boost that voltage up to at least 400 mV to use a DC-DC boost converter to get 5 V. For that ...
1
vote
1
answer
214
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Push-pull converter: ferrite core transformer dropping voltage [closed]
I am creating a 100 W, 12 V to 120 VAC @50hz inverter. I have implemented a push-pull converter to obtain a 200 VDC link for the H-bridge of the inverter.
I am having problems with the push-pull ...
0
votes
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answers
390
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How can I make a bipolar isolated DC-DC power supply for gate drivers?
I want to design a gate driver board to drive 6 SiC MOSFETs/PWR IGBT where the VBus can go up to 1200V. I need to use an isolated DC-DC power supply that can make dual bipolar rails (+15V/-8V) from a ...
2
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DC-DC flyback transformer (SMT)
I am building a flyback DC-DC converter for a school project and am new to soldering and power electronics. I want to prototype the design on a breadboard first, now that I have the design equations ...
- 21