Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf ·...

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Lecture 9: Isolated Converters ECE 481: Power Electronics Prof. Daniel Costinett Department of Electrical Engineering and Computer Science University of Tennessee Knoxville Fall 2013

Transcript of Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf ·...

Page 1: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Lecture 9: Isolated Converters

ECE 481: Power ElectronicsProf. Daniel Costinett

Department of Electrical Engineering and Computer ScienceUniversity of Tennessee Knoxville

Fall 2013

Page 2: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Announcements

• Midterm exam begins at the end of class today– Turn in Thursday, 10/3– You may use extra sheets

Page 3: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 4: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Flyback Ideal Waveforms

MOSFETv,i

t

VLM

t

t

Diode v,i

ILM ILM

0

Vg+V/n

ILM/n

-V-nVg

0Vg

-V/n

tILM-V/R

-V/R

ICO

Page 5: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Flyback Reverse Recovery

t

t

Diode v,i

ILMILM

0

Vg+V/n

ILM/n

-V-nVg

0VLM Vg

-V/n

ILM-V/R

-V/R

ICO

Page 6: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Flyback Reverse Recovery

s

rlm

s

rlmg T

QITtDIi

nVDDVv glm

'0

s

rlm

s

rlmco nT

QInTt

RV

nIDi '0

Page 7: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 8: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Large Step Conversion RatioBoost 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

Page 9: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Transistor Ratings

Page 10: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 11: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 12: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 13: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 14: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 15: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 16: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 17: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 18: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 19: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Isolated Converters

Page 20: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Transformer Saturation

Page 21: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 22: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

Buck-Derived Isolated Converters

Page 23: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 24: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating
Page 25: Lecture 9: Isolated Convertersweb.eecs.utk.edu/~dcostine/ECE481/fall2013/lectures/L9_out.pdf · Table 6.1. Active switch utilizations of some common dc-dc conveners, single operating

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