Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [resonant-converter]

Questions about resonant DC/DC converters as well as resonant DC/AC inverters used in power electronics.

52 questions
17
votes
2 answers

Electronic Drivers for Fluorescent Lamps: How is the DC-to-AC Conversion done?

Pretty much all (somewhat inaccurately named) electronic ballasts for fluorescent lamps run off a DC voltage and have to convert it into AC to operate the lamp. The DC supply can come from rectified AC mains (as seen in standard compact fluorescent…
zebonaut
  • 18,170
  • 4
  • 60
  • 104
11
votes
2 answers

What is the use of transformers with 3 pairs of wires?

I found a device which has a ferrite core and 3 coils on it. It looks like some type of transformer. What would be its use? I found it in a compact fluorescent lamp.
AndrejaKo
  • 23,261
  • 25
  • 110
  • 186
6
votes
1 answer

Induction cooker - highly irregular power transfer curve

I’ve designed a Class D series resonant inverter, for use in an induction cooking application, which is displaying a strange behavior in its measured current vs frequency curve. The topology, reproduced below, is basically a series RLC circuit fed…
swineone
  • 1,472
  • 1
  • 14
  • 21
4
votes
2 answers

Equation 20.16 Proof

In studying the Fundamentals of power electronics by Robert Erickson I do not understand how they arrived at the equations for current and voltage Link to Book, page 772 is where I am…
Quintin
  • 43
  • 3
4
votes
1 answer

High Voltage Planar Transformers

I am designing a high voltage DC/DC converter that is for an aerospace application and therefore I am focusing on reducing the size and weight, so switching at a high frequency possibly integrating wide band-gap semiconductor devices. However,…
jvnlendm
  • 387
  • 1
  • 9
3
votes
1 answer

Some problems about the BJT in the resonant Royer (or Baxandall) circuit

This question is a continuation of my previous post about the resonant Royer (or Baxandall) circuit. I have built a prototype to verify the circuit. The parameters are as follows: The parameters of the transformer are as follows: Except for the…
T L
  • 475
  • 1
  • 8
3
votes
1 answer

Limit of resonant converters

I am currently trying to design a converter with GaN technology. The converter needs to regulate a wide range of current and consequently the power goes from ~1kW to ~10kW. I took a look on Texas Instrument and Infineon and it appaers that all their…
Jess
  • 2,694
  • 1
  • 18
  • 46
3
votes
1 answer

Difference series resonant and LLC DC/DC converter

What is the exact difference between a series LC resonant converter and an LLC converter. From a topological perspective, they seem to be exactly the same. I believe that for an LLC, also the magnetizing inductance participates in the resonanance…
Simon R
  • 185
  • 1
  • 2
  • 12
3
votes
3 answers

Four transistor/full bridge version of the Royer oscillator

For some time now, I have been trying to figure out what (in theory) would be the most efficient way transfer power across a transformer. Applications include high voltage power supplies and induction heaters. I have become very interested in the…
Alex Eftimiades
  • 831
  • 1
  • 11
  • 25
3
votes
3 answers

What does the line "edge resonance between an inductor and a capacitor" exactly mean?

I am working on a project on DC DC converters in which the concept of soft switching i.e, zero voltage switching (ZVS) and zero current switching (ZCS) are used. One method to attain this is using an edge resonant switched capacitor cell (ER-SWC) as…
Norina Samson
  • 31
  • 2
2
votes
1 answer

Simulation Issues in Forward converter- Current Mode Design

I am trying to simulate the LT8310 part in LTspice. Based on my understanding, this part can operate in either the current mode or the duty mode. I am interested in the current mode design. The block diagram of the part indicates that the VC…
chami
  • 358
  • 2
  • 11
2
votes
3 answers

How to reduce NPN reverse base current on this interesting "Super Efficient Joule Thief"?

Note: The question part is the fixing of the negative current at the transistor base. It looks like there's a problem with negative current at the LED(s) -- this is not expected to be answered in this question, but will be a separate question, if…
MicroservicesOnDDD
  • 2,557
  • 1
  • 13
  • 48
2
votes
2 answers

TL494 minimum operating voltage VCC

Has anyone operated TL494 on +5VDC practically as it works in simulation software ? minimum operating voltage indicated in datasheet is +7VDC . please confirm.
Anil KG
  • 122
  • 5
2
votes
1 answer

How to dampen a royer oscillating power circuit

I have a great open-source board for induction heating here from Fluxeon which uses a Royer oscillator. It does a pretty good job and I already had it delivering power up to 1.5kW. However I continue to get smoked IGBTs and main capacitors due to…
MrLeeh
  • 121
  • 3
2
votes
1 answer

Setting correct operating frequency for LLC resonant SMPS

I need to figure out if an LLC half-bridge resonant SMPS is designed (more or less) correctly. I am not an SMPS designer, and neither is the manufacturer, so I'm just reading a bunch of app notes and learning what I can. It's producing ±35 V 400 W…
endolith
  • 28,494
  • 23
  • 117
  • 181
1
2 3 4