Lecture 8: Flyback Example -...
Transcript of Lecture 8: Flyback Example -...
![Page 1: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/1.jpg)
Lecture 8: Flyback Example
ECE 481: Power ElectronicsProf. Daniel Costinett
Department of Electrical Engineering and Computer Science
University of Tennessee Knoxville
Fall 2013
![Page 2: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/2.jpg)
![Page 3: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/3.jpg)
![Page 4: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/4.jpg)
![Page 5: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/5.jpg)
![Page 6: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/6.jpg)
![Page 7: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/7.jpg)
![Page 8: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/8.jpg)
![Page 9: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/9.jpg)
Flyback Converter Example
Vcell
Lm
1:n
Cout
S1
Vbat
+
_
Ib1
Ic1
S2
+
_
Vg
V
Equivalent Circuit Model
n
VDDVv glm
'0R
V
n
IDi lm
co '0lmg DIi
![Page 10: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/10.jpg)
![Page 11: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/11.jpg)
![Page 12: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/12.jpg)
Large Step Conversion Ratio
Boost Converter
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
50
100
150
200
250
300
350
400
450
500
V/V
g
D
Flyback, n=100
RL/n2R=0.1
RL/n2R=0.05
RL/n2R=0.02
RL/n2R=0.01
RL/n2R=0.005
Flyback Semiconductor Waveforms
t
t
Vcell
Lm
1:n
Cout
S1
Vbat
+
_
Ib1
Ic1
S2
+
_
Vg
V
![Page 13: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/13.jpg)
Flyback Switch Implementation
Vcell
Lm
1:n
Cout
S1
Vbat
+
_
Ib1
Ic1
S2
+
_
Vg
V
Flyback Reverse Recovery
t
t
![Page 14: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/14.jpg)
Flyback Reverse Recovery
t
t
Flyback Reverse Recovery
s
rlm
s
rlmg T
QI
T
tDIi
n
VDDVv glm
'0
s
rlm
s
rlmco nT
QI
nT
t
R
V
n
IDi '0
![Page 15: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/15.jpg)
![Page 16: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/16.jpg)
![Page 17: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/17.jpg)
![Page 18: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/18.jpg)
![Page 19: Lecture 8: Flyback Example - UTKweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L8_slides.pdf · Flyback Converter Example V cell L m 1:n C out S 1 V bat + _ I b1 I c1 S 2 + _](https://reader030.fdocuments.in/reader030/viewer/2022012316/5cc63cc488c993ca238c6904/html5/thumbnails/19.jpg)