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Dias nummer 1

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Flyback. 3. Opgave 1. On sp ndingsfald over dioden betegnes VD = 0.6V. ... Flyback Converter. The Flyback converte is also known as the Bock-Boost converter ... – PowerPoint PPT presentation

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Title: Dias nummer 1


1
DC-DC converter Forward, Flyback 2006
Power By Bo Rohde Pedersen
2
Today
DC-DC converter - Terminologies - Transfer
function - Forward - Flyback
3
Opgave 1
On spændingsfald over dioden betegnes VD 0.6V.
Vin20V, L 84uH, RL6 Ohm og FS100kHz 1 Tegn
strømvejsdiagrammer for continuous mode. 2 Tegn
Vi,, VL, IL, IF og Id, D0.3 3 Regn
overforingsfunktion. Er der et problem? 4 RL
ændres til 20 Ohm. Hvad skere der så?
4
Range of Simpel Transfer-function
http//www.ipes.ethz.ch/ipes/dcdc/e_Buck_1.html
5
Continuous Conduction (Forward)
Vd Vin
ILB is the rms value of the current in the
inductor IOB is the rms value of the output
current
6
Discontinuous Conduction
7
Flyback Converter
1. Strømvejsdiagrammer 2. Tegn spænding og strøm
i spolen
-Kan denne opstilling bruges til en
strømforsyning tilsluttet stikkontakten? -Hvis
ikke hvorfor?
The Flyback converte is also known as the
Bock-Boost converter
8
Flyback Converte
9
Operation with idealComponents
10
Fordele med Koblet Spole
- Galvanisk isolering - Tilpasning af D,
omsætningsfaktor på L
11
Next week
  • More DC-DC converters
  • Advanced DC-DC

12
References and Links
http//www.ipes.ethz.ch/ipes/e_index.html
http//ece-www.colorado.edu/pwrelect/book/slides/
Ch5slide.pdf
13
Opgave 2 Flyback Converte
A Tegn strømvejsdiagrammer alle komponenter
regnes for ideale. d0.25, fs100kHz, L203uH,
RL8,1Ohm ,U1,41230, C antages så stor at
spændingen over den kan regnes for
konstant. B Tegn Spænding og strøm i
spolen. C Tegn strømmen i kondensatoren D Hvad
er overføringsfunktionen i Continuous mode.
The Flyback converter is also known as the
Bock-Boost converter
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