Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.
14 Pages
8412_slides_topic4
Course: EE EE8412, Spring 2009School: Ryerson
Rating:
Word Count: 1490
Document Preview
AC Advanced Drive Systems Topic 4 Voltage Source Inverter Fed Drives EE8412 ACS1000 MV Drive Source: ABB 1 Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4 EE8412 Advanced AC Drive Systems Voltage Source Inverter Fed Drives Lecture Topics Steady-state Operation Modes Two-level VSI Fed MV Drives Neutral-point Clamped (NPC) Inverter Fed Drives Cascaded...
Unformatted Document Excerpt
Coursehero >> Canada >> Ryerson >> EE EE8412Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
AC Advanced Drive Systems Topic 4 Voltage Source Inverter Fed Drives
EE8412
ACS1000 MV Drive
Source: ABB
1
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412 Advanced AC Drive Systems
Voltage Source Inverter Fed Drives
Lecture Topics
Steady-state Operation Modes Two-level VSI Fed MV Drives Neutral-point Clamped (NPC) Inverter Fed Drives Cascaded H-Bridge (CHB) Inverter Fed Drives
2
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
1
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Operation Modes for ac motors
1. Constant Flux Operation:
V / f = constant
2. Constant Power Operation: V = constant, f = variable 3. Voltage Compensation at low rotor speeds V stator voltage, f stator frequency
3
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Constant Flux Operation - If > rated , magnetic core will be saturated. - If < rated , rated torque cannot be achieved. motor magnetic flux (general term) Toque = flux x current (general term)
4
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
2
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Constant Flux Operation Induced emf in a magnetic circuit: E = 4.44 N f where N number of turns of the coil = E / ( 4.44 N f ) = const E / f = const
V / f = const
5
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Constant Flux Operation
Te Rated
Te Max
Te
TeMax = constant
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
6
3
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Constant Power Operation When f > frated rotor speed n > nrated , but V should be kept const to avoid insulation breakdown Since = E / ( 4.44 N f ) V = const and f
7
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Constant Power Operation
Te Rated
Te Max
Te
8
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Steady-state Operation Modes
Voltage Compensation at Low Rotor Speeds To compensate the voltage drop on the stator resistors at low rotor speeds
V Rated
V comp
f Rated
9
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Two-level Inverter Fed Drives
VDM5000 Two-level VSI
Source: Alstom 10
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
5
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Two-level Inverter Fed Drives
System Block Diagram
Lf
Cd
Cf
11
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Two-level Inverter Fed Drives
Main Functional Blocks
1) Rectifier circuit - Phase shifting transformer
12 pulse diode rectifier for line current THD reduction
2) DC circuit - Dynamic braking circuit
Capacitor Filter
3) Inverter circuit - PCBB: power converter building block
Series devices for high voltage operation
4) Motor side filter - dv/dt reduction
THD reduction Common mode voltage elimination
12
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
6
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Two-level Inverter Fed Drives
Inverter Topology PCBB
Source: Alstom 13
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Two-level Inverter Fed Drives
PCBB Power Converter Building Block
Rs
Rp
Cs
14
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
7
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
VDM6000 Multilevel NPC Inverter
Source: Alstom 15
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
Drive System Diagram
Ls
Rs
Cd Cs
Ds
Lf
Cs Cd Rs Ls
Ds
Cf
Switching devices: IGCTs
16
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
8
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
Main Functional Blocks
1) Rectifier circuit - Phase shifting transformer - 12 pulse diode rectifier for line current THD reduction 2) DC circuit - Capacitor Filter - di/dt clamping circuit 3) Inverter circuit - Three-level NPC inverter 4) Motor side filter dv/dt reduction reduction THD Common mode voltage elimination
17
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
Drive System Specifications
Nominal input voltage Output power rating Output voltage rating Output frequency Drive system efficiency Input power factor Drive system Specifications Output waveform Motor type Overload capability Cooling Mean time between failure (MTBF) Regenerative braking capability 2300V, 3300V, 4160V 400 ~ 6700HP (0.3 ~ 5 MW) 0 ~ 2300V, 0 ~ 3300V, 0 ~ 4160V 0 ~ 66Hz (up to 200Hz optional) Typically > 98.0% (including output filter losses but excluding transformer losses) > 0.95 ( Displacement power factor > 0.97) Sinusoidal (with output filter) Induction or synchronous Standard: 10% for one minute every 10 minutes Optional: 150% for one minute every 10 minutes Forced air or liquid > 6 years No 18
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
9
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
Drive System Specifications (Continued)
Control scheme Control Specificatio ns Dynamic speed error Steady state speed error Torque response time Rectifier type Inverter type GCT switching frequency Power Converter Specificatio ns Number of GCTs per phase Number of clamping diodes per phase Modulation technique Inverter/rectifier switch failure mode Direct torque control (DTC) < 0.4% without encoder < 0.1% with encoder < 0.5% without encoder < 0.01% with encoder <10ms Standard: 12-pulse diode rectifier Optional: 24-pulse diode rectifier PWM, three-level NPC inverter 500Hz 4 2 Hysteresis modulation generated by DTC scheme Non-rupture, non-arc 19
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
IGBT Based NPC Inverter Drives
Cd
Lf
Cd
Cf
20
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
10
EE8412
Topic 4 Voltage Source Inverter Fed Drives
NPC Inverter Fed Drives
System Specifications IGBT based drives
Rectifier Displacement power factor Nominal utility/motor voltage Standard: 12-pulse diode rectifier Optional: 24-pulse diode rectifier or active front end (PWM IGBT rectifier) > 0.96 (12-pulse diode rectifier) 2300V, 3300V, 4160V, 6600V 0.8 ~ 2.4MW @2300V 1.0 ~ 3.1MW @3300V 1.3 ~ 4.0MW @4160V 4.7 ~ 7.2MW @4160V (Parallel converter configuration) 0.6 ~ 2.0MW @6600V 0 ~ 2300V, 0 ~ 3300V, 0 ~ 4160V, 0 ~ 6600V 0 ~100Hz (standard) 1:1000 (with encoder) Typically > 98.5% (at rated operating point, excluding transformer losses) 21
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
Output power rating
Output voltage range Output frequency Motor speed range Drive system efficiency
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
Perfect Harmony MV Drive
Source: ASI Robicon 22
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
11
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
Block Diagram
= 20
Cd
= 0
= +20
23
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
Main Functional Blocks
1) Rectifier circuit - Phase shifting transformer - Multipulse diode rectifier for THD reduction 2) Modular structure - Power Modules 3) Line- and motor-side filters No
24
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
12
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
Line-side Waveforms
Source: ASI Robicon
25
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
Drive Configurations
Multipulse Diode Rectifier Multilevel CHB Inverter
Nominal Utility/Motor Voltage
Rectifie r Pulses
Secondar y Windings
Transform er Secondary Cables
Powe r Cells
IGBT s
Voltag e Levels
Nominal Power Cell Output
Device
Inverte r
fsw
fsw
2300V
18
9
27
9
36
7
480V
600Hz
3600Hz
3300V
24
12
36
12
48
9
480V
600Hz
4800Hz
4160V
30
15
45
15
60
11
480V
600Hz
6000Hz
26
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
13
EE8412
Topic 4 Voltage Source Inverter Fed Drives
Cascaded H-bridge Inverter Fed Drives
6600V CHB Fed Drive
N Power Cell
Dual 3300V Drive
Utility Supply
Phase Shifting Transformer
A
B M
C
27
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
EE8412 Advanced AC Drive Systems
Topic 4 Voltage Source Inverter Fed Drives
28
Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4
14
Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more.
Course Hero has millions of course specific materials providing students with the best way to expand
their education.
Below is a small sample set of documents:
Below is a small sample set of documents:
Ryerson - EE - EE8412
EE8412Advanced AC Drive Systems Topic 5 Current Source Inverter Fed DrivesPowerFlex7000 MV DriveSource: Rockwell Automation1Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4EE8412 Advanced AC Drive Sy
Ryerson - EE - EE8412
Advanced AC Drive Systems Topic 6EE8412Field Oriented control (FOC)Source: ABB1Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4EE8412 Advanced AC Drive SystemsField Oriented Control (FOC)Lecture To
Ryerson - EE - EE8412
Advanced AC Drive Systems Topic 7 Direct Torque Control (DTC)EE8412Source: ABB1Textbook: Bin Wu, High-Power Converters and AC Drives, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4EE8412 Advanced AC Drive SystemsDirect Torque Control (DTC)Lecture Topi
Punjab Engineering College - CS - 289
PITTCULT: Recommender System using Trusted Human NetworkDanielle Hyunsook LeePh.D student School of Information Sciences, University of Pittsbugh 135 N. Bellefield Ave. Pittsburgh PA 15260, USA 412-445-8576, hyl12@pitt.edu Advised by Dr. Peter Brusilovs
University of Phoenix - COM 140 - COM 140
Altac Bicycles Author Date Purpose# Income statement for Atlac Bicycles for 2007 through 2009Atlac Bicycles Income Statement For the Years Ended December 31, 2007 through December 31, 2009 Year Sales Net Sales Cost of Sales Gross Margin Expenses Salarie
UC Davis - CHE - 110A
Chem 110A Homework 7: Due MONDAY, November 23 Chemistry 110A 2009 Professor McCurdy 1. Atomic units: (a) Using atomic units, for the quantities in the general formula for the energy levels of a Z 2 $ me 4 ' one electron atom, E n = ! 2 & ) , show that the
UC Davis - CHE - 110A
Homework Week 1: Due Friday, October 2 Chemistry 110A 2009 Professor McCurdy Problems from McQuarrie and Simon: 1-7 1-11 1-16 1-22 A-3 A-6 Begin from the Euler identity A-9" d2 % d 2-8 Start by writing the differential equation as $ 2 + a1 ( x ) + a0 ( x
UC Davis - CHE - 110A
Homework Week 2: Due Friday, October 9 Chemistry 110A 2009 Professor McCurdy 1. Problem 3-16 in McQuarrie. 2. (a) Find the average value of position x , momentum p , and square of the mometum p 2 for the ground and first excited state of the particle-in-a
UC Davis - CHE - 110A
Homework Week 3: Due Friday, October 16 Chemistry 110A 2009 Professor McCurdy 1. Problem 4-25 in McQuarrie and Simon The algebra should be very short and its a good idea to do this one before problem 2. 2. For the particle-in-box, the system is prepared i
UC Davis - CHE - 110A
Chem 110A Homework Week 4: Due Friday, October 23 Chemistry 110A 2009 Professor McCurdy 1. Make the harmonic approximation to each of the following diatomic potential energy functions to obtain the corresponding harmonic potential energy function of the k
UC Davis - CHE - 110A
Chem 110A Homework 5: Due Friday, October 30, 2009 Chemistry 110A 2009 Professor McCurdy Problems 2 and 3 on this homework set involve the same concepts as problems 6-11 and 6-13 to 6-15 in the text. 1. The internuclear distance of the 12 C16 O molecule i
UC Davis - CHE - 110A
Chem 110A Homework 6: Due Friday, November 13 Chemistry 110A 2009 Professor McCurdy51. Mathematica Problem: Using the trial function=i =1Ci exp(ir 2 ) with theexponents in Table I below. Calculate the variational estimate of the ground state energ
UC Davis - CHE - 110A
Chem 110A Equationsn 2 " 2 h2 n 2 h 2 = 2 mL2 8 mL2 mm = 1 2 m1 + m22 $ n#x ' sin& ) L %L( h2 d 2 k 2 +x Harmonic Oscillator: H = " 2 dx 2 2 4 % # (1/! +# x 2 / 2 "0 ( x ) = ' * e &$ ) 1/ % 4# 3 (!4 +# x 2 / 2 "1 ( x ) = ' * xe &$) with % # (1/ 4 2 "2 (
UC Davis - CHE - 110A
Quantum Mechanics in Chemistry Chemistry 110AProf. C. W. McCurdySyllabus is Posted Text: We will use Donald A. McQuarrie and John D. Simon, Physical Chemistry - A Molecular Approach (University Science Books, 1997). Prerequisites: Chem. 2C, one year of
UC Davis - CHE - 110A
Chemistry 110A Quantum Mechanics CRNs: 16134 (A01), 16135 (A02), 16136 (A03) Instructor: Office: C. William McCurdy 163E ChemistryFall 2009cwmccurdy@ucdavis.eduClass Meetings: Chemistry 110A, meets on MWF at 9:00-9:50 a.m. in WELLMAN 202. Discussion se
UC Davis - CHE - 110A
(* Content-type: application/mathematica *) (* Wolfram Notebook File *) (* http:/www.wolfram.com/nb *) (* CreatedBy='Mathematica 6.0' *) (*CacheID: 234*) (* Internal cache information: NotebookFileLineBreakTest NotebookFileLineBreakTest NotebookDataPositi
UC Davis - CHE - 110A
(* Content-type: application/mathematica *) (* Wolfram Notebook File *) (* http:/www.wolfram.com/nb *) (* CreatedBy='Mathematica 6.0' *) (*CacheID: 234*) (* Internal cache information: NotebookFileLineBreakTest NotebookFileLineBreakTest NotebookDataPositi
UC Davis - CHE - 110A
(* Content-type: application/mathematica *) (* Wolfram Notebook File *) (* http:/www.wolfram.com/nb *) (* CreatedBy='Mathematica 6.0' *) (*CacheID: 234*) (* Internal cache information: NotebookFileLineBreakTest NotebookFileLineBreakTest NotebookDataPositi
UC Davis - CHE - 110A
(* Content-type: application/mathematica *) (* Wolfram Notebook File *) (* http:/www.wolfram.com/nb *) (* CreatedBy='Mathematica 6.0' *) (*CacheID: 234*) (* Internal cache information: NotebookFileLineBreakTest NotebookFileLineBreakTest NotebookDataPositi
UC Davis - CHE - 110A
Syllabus for ECH 80 Chemical Engineering Profession Spring 2008Class Instructor: Prof. Tonya Kuhl, Bainer Hall room 3106, 4-5911, tlkuhl@ucdavis.edu Office hours: Wednesdays 3:00 4:00pm, drop by or email for appointment. Text: No assigned text, but two g
UC Davis - CHE - 110A
RIGHT AFTER CLASS HEAD TOTalk to real live engineers about their jobs and how they got them.ANNOUNCEMENT AIChE Picnic Day Activities" Saturday, April 18th 10-3pmVolunteer contact: Cat - catgo@ucdavis.eduHave fun making liquid nitrogen ice-cream, const
UC Davis - CHE - 110A
Announcements PICNIC DAY VOLUNTEERSContact catgo@ucdavis.edu AIChE 2nd Spring General Meeting Wednesday, April 22nd, 5-6:30pm in Kemper 1065Grand Challenges for Engineering Make solar energy economical Provide energy from fusion Develop carbon seques
UC Davis - CHE - 110A
Announcements AIChE 2nd Spring General Meeting TODAY 5-6:30pm in Kemper 1065 Thursday - 4/30/2009 Spring Internship and Career Fair 10 a.m. - 2 p.m. at the ARC Pavilion Get your resume ready.Training ProgramsFormal training On-the-job training Sink or
UC Davis - CHE - 110A
AnnouncementFriday AIChE Kronecker Delta Golf Tournament 10-2pm Davis Muni Golf CourseInteract with Industry Representatives primarily UCD Alumni, fellow students, and faculty Start your final exam essay Next 3 lectures will have folks from IndustryDo
UCSB - ECE - 000
Fundamentals of Terrestrial Millimeter-Wave and THz Remote Sensing E.R. BrownProfessor of Electrical Engineering University of California, Los Angeles Los Angeles, CA 90095 Email: erbrown@ee.ucla.edu ; drerbrown@earthlink.netAbstract Having long been th
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Course Laboratory Project THz Characterization of a LiTaO3 Pyroelectric Detector Background The THz field has advanced dramatically during the past 10 years largely in large part because of the development of useful
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Course Laboratory Project THz Characterization of a LiTaO3 Pyroelectric Detector Background The THz field has advanced dramatically during the past 10 years largely in large part because of the development of useful
UCSB - ECE - 000
THz Science, Technology, and Systems Professor E. R. Brown, 2205C Engineering Sciences Bldg, erbrown@ece.ucsb.edu. Designed as a survey course but with enough substance to act as a foundation for students entering the THz field. Lecture Hours: Tuesdays an
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 THz Sensitivity Characterization of a LiTaO3 Pyroelectric Detector Write-Up Questions for Laboratory Project (due by 5:00 PM local time, Thursday 10 December 2009) A Water Grey Bodies in NET Set-Up 1. In class we di
UCSB - ECE - 000
ECE 594I Syllabus: Fall 2009 Background for THz Field and Radiative Phenomenology: blackbody radiation, Kirchoffs relation, and propagation through common materials (vapor, solids, and liquids) at THz frequencies Electromagnetics and Propagation Effects:
UCSB - ECE - 000
2009 International Symposium of Space Terahertz. Paper Number: 42 20th International Symposium on Space Terahertz Technology, Charlottesville, 20-22 April 2009 W1C1A 200 GHz Schottky Diode Quasi-Optical Detector Based on Folded Dipole AntennaL. Liu, Me
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Homework Problems #1: Fundamentals of Radiation and Fluctuations 1. Plancks law of radiation is a triumph of quantum physics and very useful in many fields of science and engineering. (a). Given a 300 K blackbody of
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Solutions #11.0E-02Brightness [W/m^2/Sr/GHz]Rayleigh-Jeans Limit1.0E-031.0E-041.0E-051.0E-06 1.0E-06 0.1 1 10 100Frequency [THz]Brightness function for Problem 1 (unity emissivity and T = 300 K). 1. (a) Fro
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Homework Problems #2: THz Propagation Phenomenology 1. Vapor State: Molecular Rotational Transitions. Along with water, the Earths atmosphere can hold many trace molecules of interest for global warming, and homelan
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 Homework #2 Solutions: THz Propagation Phenomenology 1. Vapor State: Molecular Rotational Transitions. . (a) A quick Wikipedia search shows that N2O is the linear molecule (i.e., rotor) with bond lengths shown below
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009HW#3: Antennas for the THz Region1. Feedhorns: Metallic feedhorns have long been popular as antennas at mm-wave and THz frequencies. The simplest designs transform a single mode waveguide to free space through a le
UCSB - ECE - 000
ECE594I, Prof. Brown, Fall Quarter 2009 HW#3 Solutions 1) To evaluate the feedhorn, start with F(,) = exp(-10 2) , 2 (a) Half-power beam width defined by 0.5 = exp[10( / 2) ] where is the full width at the half-power points. 1/ 2 Solving f or , we get 2 *
UCSB - ECE - 000
THz Science, Technology, and Systems The best motivation for students and researchers entering a new field is often the scientific history and systems applications. This first set of notes provides some highlights from three scientific and application ar
UCSB - ECE - 000
Notes #2, ECE594I, Fall 2009, E.R. BrownOverview of RF SensorsDefinition: an RF system designed to detect the presence of objects or materials through their electromagnetic reflection or emission.HierarchyRF Sensors SensorsProximity to TargetRemote
UCSB - ECE - 000
Notes #3, ECE594I, Fall 2009, E.R. BrownA Quick Look at THz Attenuation Mechanisms and PropagationTwo types of attenuation, both more common than in lower RF bands: (1) Absorption - Conversion of electromagnetic radiation into heat (a) Conduction curren
UCSB - ECE - 000
Notes #4, ECE594I, Fall 2009, E.R. BrownCoupling of THz Radiation to Free Space: Antennas* A critical aspect of any remote sensor is the coupling from the circuit (or transmission line) medium of the sensor to the external medium in which the target is
UCSB - ECE - 000
Notes #5, ECE594I, Fall 2009, E.R. BrownFree-Space Power Coupling for Two Special Cases: Radar and Radiometry Friis' Transmission FormulationMarconi was the pioneer for a new generation of electrical engineers working in the area of wireless. One of the
UCSB - ECE - 000
Notes #6, ECE594I, Fall 2009, E.R. BrownGaussian-beam methodology A key assumption behind the predictions given from scalar diffraction theory is that the illumination across the aperture is uniform. This is a good assumption in some circumstances such a
UCSB - ECE - 000
Notes #7, ECE594I, Fall 2009, E.R. BrownTHz Receiver Architectures and the Process of DetectionAs discussed in the Introduction, an important aspect of all THz sensor design, and all RF systems in general, is receiver architecture. schematically in Fig.
UCSB - ECE - 000
Notes#8, ECE594I, Fall 2009, E.R. Brown Heterodyne and Homodyne ConversionBackgroundThe heterodyne technique goes back to the early days of radio (World War I) when amplifiers were in their infancy and all made from vacuum tubes, meaning that it was dif
UCSB - ECE - 000
Notes#8, ECE594I, Fall 2009, E.R. Brown Heterodyne and Homodyne ConversionBackgroundThe heterodyne technique goes back to the early days of radio (World War I) when amplifiers were in their infancy and all made from vacuum tubes, meaning that it was dif
UCSB - ECE - 000
Notes#9, ECE594I, Fall 2009, E.R. BrownOptimum Pre-Detection Signal Processing (the matched filter concept) Maximum Signal-to-Noise Ratio (Intuitive Derivation) Intuitively, detection in the presence of noise has limits imposed by physics (especially the
UCSB - ECE - 000
Notes#9, ECE594I, Fall 2009, E.R. BrownOptimum Pre-Detection Signal Processing (the matched filter concept) Maximum Signal-to-Noise Ratio (Intuitive Derivation) Intuitively, detection in the presence of noise has limits imposed by physics (especially the
UCSB - ECE - 000
910IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 50, NO. 3, MARCH 2002Terahertz TechnologyPeter H. Siegel, Fellow, IEEEInvited PaperAbstractTerahertz technology applications, sensors, and sources are briefly reviewed. Emphasis is placed
UCSB - ECE - 000
UCSB - ECE - 000
1.1 Gaussian beams Consider two identical spherical mirrors A and B that have been aligned to be focal directly face each other as in Figure 1Q1. The two mirrors and the space in between them (the optical cavity) form an optical resonator because only cer
UCSB - ECE - 000
2.5 Dielectric slab waveguide Consider a dielectric slab waveguide which has a thin GaAs layer of thickness 0.2 m between two AlGaAs layers. The refractive index of GaAs is 3.66 and that of the AlGaAs layers is 3.40. What is the cut-off wavelength beyond
UCSB - ECE - 000
3.2 GaAs GaAs has an effective density of states at the conduction CB Nc of 4.71017 cm-3 and an effective density of states at the VB edge Nv of 71018 cm-3. Given its bandgap Eg of 1.42 eV calculate the intrinsic concentration and the intrinsic resistivit
UCSB - ECE - 000
4.3 The Ar ion laser The argon-ion laser can provide powerful CW visible coherent radiation of several watts. The laser operation is achieved as follows: The Ar atoms are ionized by electron collisions in a high current electrical discharge. Further multi
UCSB - ECE - 000
4.12 aLaser diode efficiency There are several laser diode efficiency definitions as follows: The external quantum efficiency EQE, of a laser diode is defined as Number of output photons from the diode (per unit second ) Number of injected electrons into
UCSB - ECE - 000
7.9 Soleil Compensator: Consider a Soleil compensator as in Figure 7Q9 that uses a quartz crystal. Given a light wave with a wavelength 600 nm, a lower plate thickness of 5 mm, calculate the range of d values in Figure 7Q9 that provide a retardation from
UCSB - ECE - 000
5.3 Ge Photodiode Consider a commercial Ge pn junction photodiode which has the responsivity shown in Figure 5Q3. Its photosensitive area is 0.008 mm2. It is used under a reverse bias of 10V when the dark current is 0.3 mA and the junction capacitance is
UCSB - ECE - 000
Solutions Manual for Optoelectronics and Photonics: Principles and Practices S.O. Kasap 23 April 20016.16.3 Solar cell driving a load a A Si solar cell of area 4 cm2 is connected to drive a load R as in Figure 6.8 (a). It has the I-V characteristics in
UCSB - ECE - 000
Midterm SolutionsECE 162C May 6, 2009Department of Electrical and Computer Engineering University of California, Santa BarbaraName_` (20 pts) 1. It is desired to put anti-reflection (AR) coatings on a DFB laser chip. It emits at 1550 nm and is compose
UCSB - ECE - 000
UCSB - ECE - 000
UNIVERSITY OF CALIFORNIA Santa Barbara Department of Electrical and Computer Engineering Problem Set No. 1 Fall 2007 ECE 201A 1. In this course we shall use many operator identities. All of them are derivable from the following relations of vector algebra