Why is chaos more studied in dc-dc converters compared to other circuits?

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Discussion Overview

The discussion revolves around the reasons why chaos is more extensively studied in dc-dc converters compared to other nonlinear circuits, such as rectifiers. Participants explore the nature of chaos in electronic circuits, particularly focusing on power electronics and the characteristics of chaotic behavior in different modes of operation.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants question why chaos is primarily studied in dc-dc converters and not in rectifiers, suggesting a lack of emphasis on chaos analysis in the latter.
  • Others point out that chaos can occur in any system with nonlinear elements, citing examples like Chua's circuit and the general potential for chaotic behavior in electronic circuits.
  • A participant mentions an article discussing chaos in power electronics, including rectifiers, indicating that there is some literature on the topic.
  • There is a distinction made between deterministic chaos and noise, with participants clarifying that the original inquiry pertains to deterministic chaos.
  • Participants discuss the chaotic behavior in dc-dc converters, noting that output waveforms can become aperiodic or chaotic under certain conditions, and that the study of chaos differs between continuous conduction mode (CCM) and discontinuous conduction mode (DCM).
  • One participant expresses uncertainty about whether the behavior described qualifies as chaos, particularly in relation to discontinuous mode operation.
  • Another participant provides a link to an article that may contain relevant information on chaos in power electronics.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the reasons for the focus on chaos in dc-dc converters versus rectifiers. Multiple competing views and uncertainties remain regarding the definitions and characteristics of chaos in these contexts.

Contextual Notes

There are limitations in the discussion regarding the definitions of chaos and noise, as well as the specific conditions under which chaotic behavior is observed in different circuit modes. The understanding of chaos in power electronics may depend on the specific characteristics of the circuits being analyzed.

student-engineer
Why is chaos only more studied in dc-dc converters and not in other nonlinear circuits, such as, rectifiers?
 
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student-engineer said:
Why is chaos only more studied in dc-dc converters and not in other nonlinear circuits, such as, rectifiers?
What leads you to believe this is the case?
 
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Because I have not read about chaos analysis of rectifiers anywhere,except for few places.May be that is not emphasized much.
 
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Performing a Google search on "chaos in electronic circuits" returns over 500,000 hits; Chua's circuit, for example.
Search Youtube for "electronic circuit chaos". More generally, systems containing one or more non-linear elements have the potential to exhibit chaotic behavior.

 
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student-engineer said:
Why is chaos only more studied in dc-dc converters and not in other nonlinear circuits, such as, rectifiers?
Can you post a link to what you are asking about? Chaos in what part of the DC-DC converter? And do you really mean chaos and not just "noise"?
 
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There is apparently an article (with a good number of citations) that discusses a number of examples from power electronics, among which a rectifier circuit.
A co-author of one of my advisors has worked on this specific topic and has written some more recent review material as well. Of course, there is much more around, as already indicated in post #4.

I'm sorry, I cannot help you with the engineering part of this topic, but here are others that can.
berkeman said:
And do you really mean chaos and not just "noise"?
Yes, that is a good point, but given the OPs question history, I think he is interested primarily in deterministic chaos.
 
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Yes,I mean deterministic chaos.Noise is a random phenomenon.
I read that paper by Hamill and deane before.But most of the papers are about chaos in dc-dc converters and not about rectifiers.
 
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student-engineer said:
Yes,I mean deterministic chaos.Noise is a random phenomenon
Okay, but can you reply to this part please?
berkeman said:
Chaos in what part of the DC-DC converter?
 
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berkeman said:
Okay, but can you reply to this part please?
Sorry,I was busy for a while.In a dc-dc converter or a power electronic circuit,waveforms of output current and voltage (i.e. the state variables) can get aperiodic or chaotic.This is when circuit is said to be working in a chaotic mode.Hope that this answers your query,if not,then I can elaborate more on what I think that I know about it.
Thanks to the physics forum for knowledge.
 
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  • #10
Welcome back! :smile:
student-engineer said:
Sorry,I was busy for a while.In a dc-dc converter or a power electronic circuit,waveforms of current and voltage across some element of circuit can get aperiodic or chaotic.This is when circuit is said to be working in a chaotic mode.Hope that this answers your query,if not,then I can elaborate more on what I think that I know about it.
Thanks to the physics forum for knowledge.
No, sorry. That doesn't really help. Are you referring to discontinuous mode? From what I've seen of the definition of chaos earlier in this thread and elsewhere, I'm not sure it qualifies... (but I know very little about chaos)
 
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  • #12
berkeman said:
Welcome back! :smile:

No, sorry. That doesn't really help. Are you referring to discontinuous mode? From what I've seen of the definition of chaos earlier in this thread and elsewhere, I'm not sure it qualifies... (but I know very little about chaos)
Chaos in dc-dc converters is studied separately for their ccm (continuous conduction mode) and dcm (discontinuous conduction mode) modes.The method of study of chaos for dcm mode changes as the functioning of circuit changes in this mode.For instance,in buck converter,current in inductor cannot be zero in ccm mode,whereas,it takes the zero value too during dcm mode.The mapping process changes.The waveforms of the state variables are periodic in power electronic converters.They become aperiodic in chaotic mode.That is what I know.I can be wrong too. :smile:
 
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