Timeline for Initial Transient Response of Boost Converter
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| S Jul 19, 2023 at 21:01 | history | suggested | hana | CC BY-SA 4.0 |
voltage conversion ratio of boost converter is 1/(1-d) not d/(1-d).
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| Jul 19, 2023 at 19:30 | review | Suggested edits | |||
| S Jul 19, 2023 at 21:01 | |||||
| Feb 5, 2021 at 16:56 | comment | added | a concerned citizen | Re-reading now I see I should have added that what I present as a DCM averaged model is, in fact, an approximation: it won't let the current go below zero, but it does drop to zero, which doesn't happen in DCM. | |
| Dec 28, 2020 at 10:46 | comment | added | a concerned citizen | I've updated my answer, maybe it's clearer now. | |
| Dec 28, 2020 at 10:46 | history | edited | a concerned citizen | CC BY-SA 4.0 |
added example
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| Dec 28, 2020 at 8:20 | comment | added | a concerned citizen | It's possible that my English is not that clear, but the whole response is about comparing the "raw" RLC with the boost power stage: for a non-feedback CCM, the responses are the same (provided you make the equivalent RLC values), while for DCM it's not possible due to the inherent linearity of the RLC (DCM, being discontinuous, is nonlinear). Feedback linearizes the transfer function, which means damping; without it, the system's transfer function is, largely, dominated by the RLC transfer function. Even with it, but the loop changes the behaviour. | |
| Dec 28, 2020 at 0:47 | comment | added | AlfroJang80 | "While it is a step-like action, the time constants differ by a very large amount. The step response of the (R)LC filter is dictated by its natural frequency, which is much lower than the switching frequency." - But, how come it happens in the first place then? The switching frequency is what is connecting the 24V to the LC filter from the start. Is it because of the extremely high di/dt at the start since there is no current in the inductor? | |
| Dec 28, 2020 at 0:10 | history | answered | a concerned citizen | CC BY-SA 4.0 |