Download Power Electronics Course: DC-DC Converter Design and Analysis and more Slides Electrical Engineering in PDF only on Docsity! Power Electronics Docsity.com Course Outline • Fundamental of Power Electronics for Computer Systems, Handheld Devices, Laptops, etc • More emphasis in DC‐DC converter design • Use textbook “Fundamental of Power Electronics” Second edition by R. Erickson and D. Maksimovic • Course Syllabus and schedule are posted in course website: eas.uccs.edu/wang/ECE5990 Docsity.com Chapter 1: Introduction
1.1. Introduction to power processing
1.2. Some applications of power electronics
1.3. Elements of power electronics
Summary of the course
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1.1 Introduction to Power Processing
Power Switetaing Power
nt converter oupa
input
De-de conversion: Change and control voltage magnitude
Ac-de rectification: Possibly control de voltage. ac current
De-ac inversion: Produce sinusoid of controllable
magnitude and frequency
cycloconversion: Change and control voltage magnitude
and frequency
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Control is invariably required
Power Switching Power
input converter outpus
feedforward feedback
Controller
P rerence
its Power ler
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Devices available to the circuit designer
Resistors
L
:
Capacitors
Magnetics
CLT
Linear-
mode Switched-mode
Semiconelucior devices
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Devices available to the circuit designer
L
:
Resistors | Capacitors
Magnetics
CLT
Linear-
mode Switched-mode
Semiconelucior devices
Signal processing: avoid magnetics
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Devices available to the circuit designer
Resistors
L
:
Capacitors
Magnetics
Linear
mode
Semiconelucior devices
Switched-mode
Power processing: avoid lossy elements
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Dissipative realization
Resistive voltage divider
1
10a,
1
Rov
5a 7 s0v
sommes BL = SOW
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Dissipative realization
Series pass regulator: transistor operates in
active region
err 10A
+
Vv, tinear amplifier .
* and base driver R v
5QJ Sov
Prggg = 500W
Pog = 5O0W
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Linear Regulator is still in use, but the transistor is in saturation region. Such as LDO regulator. A LDO regulator is a DC linear voltage regulator which operates with very small input-output differential voltage. The advantages of LDO: Minimum operating voltage, high efficiency, and low heat dissipation Docsity.com Addition of low pass filter
Addition of (ideally lossless) L-C low-pass filter, for
removal of switching harmonic:
lency J,
ig circult is known as the “buck converter"
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Addition of control system
for regulation of output voltage
Power itching erin Lond
inp
Transistor Fre
oie driver signet
4
wee
Reference
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The boost converter
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Power system of an earth-orbiting spacecraft
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An electric vehicle power and drive system
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Part I. Converters in equilibrium
Inductor waveforms Averaged equivalent circuit
un
a 4 Prodicted elficiancy
ijrmer isolation
Part II. Converter dynamics and control
‘Ac modeling
Converter transfer functions:
Controller design
Input fiter design
Ac and de equivalent circuit modeling of the discontinuous
conduction mode
urrent-programmed control
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Appendices
A. RMS values of commonly-observed converter waveforms
B. Simulation of converters
C. Middlebrook’s extra element theorem
D. Magnetics design tables
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