Dr. AHMET M. HAVA
CONTACT INFORMATION:
Electrical &
Electronics Engineering Dept. Room # A 303
Üniversiteler
Mahallesi, Dumlupınar Bulvarı No:1, Çankaya 06800 Ankara/Turkey
Tel
: +90 (312) 210 2377
Fax :
+90 (312) 210 2304
E-mail :
Internet: METU: http://www.metu.edu.tr Personal: http://users.metu.edu.tr/hava
Research Profile: Ahmet
Hava Profile
EDUCATION:
Ph.D., Electrical Engineering; 1998,
University of Wisconsin-Madison, Dept. of Electrical and Computer
Engineering ( WEMPEC)
M.Sc., Electrical Engineering; 1991, University of
Wisconsin-Madison, Dept. of
Electrical and Computer Engineering ( WEMPEC)
B.Sc., Electrical Engineering; 1987.
FIELDS OF INTEREST:
General:
* Power Electronics
* Electric Power Quality
* Electric Motor Drives
* Electric Machines
Specific:
* Design of high performance power
electronic conversion systems with emphasis on high power density, high energy
efficiency, high reliability, and reduced cost
* Power electronic converter design and
control with widebandgap material switches such as GaN and SiC transistors
*
Clean energy such as wind energy, solar energy, sustainable environment
favoring projects involving integration of various energy sources, energy
efficient power conversion devices, etc.
* Multi-phase power conversion systems and power converter system
analysis, design, etc.
* Motion control, electric drives,
servo systems, high bandwidth high performance motion
* Design and control of electric power
quality devices, such as active filters and reactive power compensation devices
* Applications of control theory (specifically discrete time
control systems) to energy systems and industrial processes
TEACHING:
Current Semester:
EE 209 Fundamentals of
Electrical and Electronics Engineering
On learning by doing: learning-cone
Past Years:
EE 590 Seminar (2009, 2014, 2015)
EE 569 Special Topics in Power
Electronics (Spring 2003/4/5, 2007/8/9, 2014/5, 2017)
EE 464 Power Electronics II (Spring 2004, 2006/7/8/9, 2011-2012-METU-NCC,
2014/5/6/7)
EE 463 Power Electronics I
(Fall 2003/5/6, 2007x2, 2008x2, 2009x2, 2013, 2011-2012-2013-METU-NCC,
2014/5/6)
EEE 462 Electrical Motor
Drives (2012-METU-NCC)
EE 362 Electromechanical
Energy Conversion II (Spring 2003, 2005/6, Spring
2011x2)
EE 361 Electromechanical
Energy Conversion I (Fall
2005, Fall 2010x2)
EEE 361 Electromechanical
Energy Conversion (Fall 2012-METU-NCC)
EE 282 Introduction to Digital
Electronics (Spring 2008, 2011-METU-NCC, 2016)
EE 281 Electrical Circuits (Fall 2002, 2003, 2004x2, 2006, 2013, 2016,
2011-METU-NCC)
EE 209 Fundamentals of Electrical and Electronics Engineering (Fall 2017x2, Spring 2018x2, Fall 2018x2, Spring 2019x2)
EXPERIENCE:
Middle East Technical University (METU):
Professor, 9/2015 - Present
Associate Professor, 5/2010 9/2015
Assistant Professor, 9/2002 4/2010
METU-Northern Cyprus
Campus, Visiting Faculty, 9/2011-7-2013
Yaskawa Electric
America Inc. (in collaboration with Yaskawa Electric Co.) Senior R&D Engineer,
11/1997-5/2002
University of Wisconsin-Madison, Graduate
Student, Research/Teaching Assistant 1988-1997
Rockwell Automation-Allen Bradley Inc.Temp. Engineer 1994-1995
Istanbul Technical University,
Teaching Assistant 3/1987-11/1987
SELECTED PUBLICATIONS:
17) Z. Özkan and A.
M. Hava, Inductor
Saturation Compensation with Resistive Decoupling for Single-Phase Controlled
VSC Systems, IEEE Transactions on Power
Electronics, 2019.
16) Z. Özkan and A. M. Hava, Current Control of Single-Phase VSC
Systems with Inductor Saturation Using Inverse Dynamic Model Based Compensation,
IEEE Transactions on Industrial Electronics, 2019.
15) E.
Kantar and A. M. Hava, Optimal Design of
Grid-Connected Voltage-Source Converters Considering Cost and Operating Factors,
IEEE Transactions on Industrial Electronics, Vol.63, Issue:9, pp. 5336-5347,
September 2016.
14) C-C. Hou, C-C. Shih, P-T. Cheng, and A. M. Hava, Common-Mode Voltage Reduction Pulse-width Modulation Techniques for Three-Phase Grid Connected Converters, IEEE Transactions on Power Electronics, Vol.28, no. 4, pp. 1971-1979, April 2013.
13) O.S. Şentürk
and A. M. Hava, Performance Enhancement of The Single-phase Series Active
Filter by Employing The Load Voltage Waveform Reconstruction and Line Current
Sampling Delay Reduction Methods, IEEE Transactions on Power Electronics, Vol.26,
no. 8, pp. 2210-2220, August 2011.
12) A.M. Hava and E. Ün, A High Performance PWM
Algorithm for Common Mode Voltage Reduction in Three-phase Voltage Source
Inverters, IEEE Transactions on Power Electronics, Vol.26, no. 7, pp.
1998-2008, July 2011.
11) Ö. Göksu
and A. M. Hava, Experimental Investigation of Shaft Transducerless
Speed and Position Control of AC Induction and Interior Permanent Magnet
Motors, Turkish Journal of Electrical Engineering and Computer Sciences, (TJEEC), Vol.18,
No.5, pp. 865-882, 2010.
10) O.S. Şentürk
and A. M. Hava, High Performance Harmonic Isolation and Load Voltage
Regulation of The Three-phase Series Active Filter Utilizing The Waveform
Reconstruction Method, IEEE Transactions on Industry Applications, Vol. IA-45,
No. 6, pp. 2030-2038, Nov/Dec. 2009.
9) E. Demirkutlu
and A.M. Hava, A Scalar Resonant Filter Bank Based Output Voltage Control
Method and a Scalar Minimum Switching Loss Discontinuous PWM Method for the
Four-leg Inverter Based Three-phase Four-wire Power Supply, IEEE Transactions
on Industry Applications, Vol. IA-45, No. 3, pp. 982-991, May/June 2009.
8) E. Ün and
A.M. Hava, A Near State PWM Method with Reduced Switching Losses and Reduced
Common Mode Voltage for Three-Phase Voltage Source Inverters, IEEE
Transactions on Industry Applications, Vol. IA-45, No. 2, pp. 782-793,
March/April. 2009.
7) A.M. Hava and E. Ün,
Performance Analysis of Reduced Common Mode Voltage PWM Methods and Comparison
with Standard PWM Methods for Three-phase Voltage Source Inverters, IEEE
Transactions on Power Electronics, Vol.24, No. 1, pp. 241-252, January 2009.
6) K. Yamanaka, A.M. Hava, H. Kirino, Y. Tanaka, N. Koga, T.J. Kume,
A Novel Neutral Potential Stabilization Technique Using The Information Of
Output Current Polarities and Voltage Vector, IEEE Transactions on Industry Applications, Vol. IA-38, No. 6, pp.
1572-1580, Nov/Dec. 2002.
5) J.K. Kang, H. Hara, E. Yamamoto, E.
Watanabe, A.M. Hava, T.J. Kume, The Matrix Converter
Drive Performance Under Abnormal Input Voltage Conditions, IEEE Transactions
on Power Electronics, Vol.17, pp. 721-730, September 2002.
4) A. M. Hava, S. K. Sul,
R. J. Kerkman, T. A. Lipo,
Dynamic Overmodulation Characteristics of Triangle
Intersection PWM Methods, IEEE Transactions on
Industry Applications, Vol. IA-35, pp. 896-907, July/Aug. 1999. (Presented at
IEEE-IAS97 Conference, New Orleans, Louisiana, Oct 1997, pp. 1520-1528).
3) A. M. Hava, R. J. Kerkman, T. A. Lipo, A High Performance Generalized Discontinuous PWM
Algorithm, IEEE Transactions on Industry Applications, Vol. IA-34, pp.
1059-1071, Sept./Oct. 1998. (Presented at IEEE-APEC97 Conference, Atlanta, Georgia,
February 1997, pp. 886-891).
2) A. M. Hava, R. J. Kerkman,
T. A. Lipo, Simple Analytical And
Graphical Methods For Carrier Based PWM-VSI Drives, IEEE Transactions on Power
Electronics, Vol.14, pp. 49-61, January 1999. (Presented at IEEE-PESC97
Conference, St. Louis, Missouri, June 1997, pp. 1462-1471) Errata sheet JP3errata
1) A. M. Hava, R. J. Kerkman,
T. A. Lipo, Carrier Based PWM-VSI Overmodulation Strategies: Analysis, Comparison, and
Design, IEEE Transactions on Power Electronics, Vol.13, pp. 674-689, July
1998.
FULL LIST OF PUBLICATIONS: publications
PATENTS (All available in PDF format):
1)
R. J. Kerkman, D. Leggate, G. Skibinski, A. M. Hava, US Patent, # USP 5,912,813, Method
and apparatus for controlling reflected voltage using a motor controller, June
15, 1999. PAT1
2)
A. M.
Hava and R. J. Kerkman, US Patent, # USP 6,023,417
Generalized Discontinuous Pulse Width Modulator, February 8, 2000. PAT2
COMPLETED FUNDED RESEARCH
PROJECTS:
6) VESTEL A.Ş., Fotovoltaik
Sistemler için 50kW Evirici Tasarımı 12/2016-6/2018. (Power and
control system design and development of a 50 kW grid connected PV inverter)
5) TÜBİTAK
EEEAG-104E141 Üç Fazlı 10 kVA Birleşik Güç Kalitesi Düzelticisinin
Geliştirilmesi 01/07/2005-01/03/2008.
4) TÜBİTAK
EEEAG-104E009 Kesintisiz güç kaynağı güç elektroniği
devrelerinin ayrık zamanlı denetimi ve bu denetim sistemlerinin
ayrık zamanlı denetim platformunun geliştirilmesi, 01/07/2004 -
30/06/2007.
3) ODTÜ BAP-2004-07-02-00-120,
Güç doğrultucuları için geniş bantlı harmonik
filtrelerinin tasarımı, 01/01/2004-30/06/2005.
2) A. M. Hava, T. A.
Lipo, Utility Interface Selection Issues for a Variable Speed Wind Turbine
Generator System, US-Windpower/Kenetch Co., Livermore, California, January,
1994.
1) A. M. Hava, T. A.
Lipo, Simulation and Control Algorithm Development of a Double Stator Winding
Induction Machine Drive, Sundstrand Co., Rockford, Illinois, September,
1993.
INDUSTRY CONSULTING AND
INDUSTRY COLLABORATION PROJECTS:
Exclusive experience in low voltage distribution system (380V, 50 Hz) operated
power converters, specifically voltage source inverter technologies (ranging
from sub kW units to several hundred kW ratings) with the following
applications in front;
2003-2010: Transformerless
three-phase on-line UPS systems (converter design, high performance discrete
time control, converter paralleling)
2012+ :
Industrial vector controlled drives, speed controlled drives, high bandwidth
servo drives
2016+ :
Grid connected three-phase PV converter systems (design and control)
2017+: Mil spec power supplies
(design and control)
THESES:
Ph.D. Thesis: December 1998, University of Wisconsin-Madison, Madison,
Wisconsin, U.S.A
Thesis Title: Carrier Based PWM-VSI Drives In The Overmodulation
Region hava-phd-thesis-download
M.Sc. Thesis: May 1991, University of Wisconsin-Madison, Madison, Wisconsin,
U.S.A
Thesis Title: A Modified C-Dump Converter For Switched Reluctance Machines
B.S. Thesis: February 1987, İstanbul Teknik Üniversitesi, İstanbul, Türkiye
Thesis Title: Hysteresis Motors (In Turkish, Histerezis
Motorları)
AWARDS:
The Turkish Ministry of Education (MEGSB) graduate scholarship for MSc
and PhD Studies, from 1988-1993.
Second prize paper award of the IEEE-IAS Industrial Power Converter
Committee for the paper A Modified C-Dump Converter for Switched Reluctance
Machine Drives, at the IAS'91 annual meeting, Dearborn, Michigan, Oct. 1991.
IEEE Power Electronics Society, 1999 Transactions Prize Paper Award for
the journal publication Simple Analytical And Graphical Methods For Carrier
Based PWM-VSI Drives, published in IEEE Trans. on Power Electronics, Vol. 14,
No. 1, January 1999. PELS-awards
METU Engineering Faculty, Top 20% academic performance award (2007,
2009, 2011, 2012, 2013, 2015).
AFFILIATIONS:
IEEE Society: Senior
Member (S91,M98, SM14), IEEE
IEEE Power Electronics Society: PELS
IEEE Industry Applications
Society: IAS
IEEE Industrial
Electronics Society: IES
TMMOB Elektrik Mühendisleri
Odası: EMO
SOME INTERESTING LINKS
Scientific American Magazine: www.sciam.com
Your Internet Doctor: WebMD
Amazon Bookstore: Amazon
Barnes & Noble Bookstore: www.barnesandnoble.com
Music: mylinks
Information about
Information about
Türk Dil Kurumu: TDK
İngilizce-Türkçe Sözlük:
B.Sankur-Sözlük
Google Scholar: GS
ETMD ( Elektrik Tesisat Mühendisleri
Derneği )
ASEE Prism Magazine: PRISM
Türk Patent Enstitüsü: TPE
Motion Control Magazine: Motion
Power Quality
Power Electronics Technology Magazine: PET
MY POWER ELECTRONICS HOMEPAGE
Here you will find some information and link to resources on power electronics.
GOOD THINGS ON POWER ELECTRONICS
My Graduate Students and Their Theses, Suggestions for Prospect Thesis
Students
Detailed student-thesis-publication information in this link: theses
PROSPECT GRADUATE STUDENTS:
For ambitious students I will supervise Msc/PhD
Theses in a wide research area.
Important
notice: In my more than 17 years of experience in the academic environments in
Turkey, I have witnessed that in the Government-Industry-Academics triangle,
there is a major lack of awareness on the role of university research. This is
unfortunately so. Industry does not encourage the skillful engineers to obtain
advanced engineering degrees such as MSc and PhD. Neither is the academic world
requesting a structured correction, nor the government is enforcing rules for
correction. The end result is that skilled students prefer to work in industry
full time (for full financial benefit) and only some of them and mostly as part
time they continue graduate studies. Of course, the part time graduate school
attendance does not allow full exploration of research capabilities. So, as an
experienced researcher, I have found this path is neither fruitful to the
student nor to the advisor. Therefore, I have made adjustments in my requirements
for accepting students. Currently, I only favor students under two conditions;
1) Student meets my academic record
expectations and is willing to be a full time researcher at the university
(with own funding, Tubitak scholarship, university
research assistantship etc.)
2) Student meets my academic record
expectations and the employer favors the student to work on a project which I
am a consultant/supervisor for. Then the project must carry potential for
publication (as an indicator that the project is research type and qualifies
for a thesis subject). Of course, this option requires that I am expert in the
field, the employer funds such a project, the student is willing, etc. In
brief, meetings in advance, preparations, etc. are necessary.
For comprehensive information on my masters thesis supervision visit the following
link: Yüksek lisans
For PhD candidates: PhD
PAST GRADUATES AND THEIR THESIS
TITLES:
26) Ziya Özkan: (PhD, graduated in June 2019) Title: High Performance Current Control Methods For Voltage Source Converters Wıth Saturable İnductors
25) Oğuzhan Öztoprak: (MSc,
graduated in June 2019) Title: Performance Evaluation And Comparison Of Low Voltage
Grid-Tied Three-Phase Ac/Dc Converter Configuratıons With Si And SiC
Semiconductor Switches
24) Feyzullah Ertürk: (MSc, graduated in May 2015) Title: Investigation of Modular
Multilevel Converter Control Methods
23) S. Nadir
Usluer: (MSc, graduated in December 2014) Title: Switch Mode Converter Based
Damping Of PWM Converter With LCL Type Filter For Grid Interface Of Renewable
Energy Systems
22) Barış Çiftçi: (MSc, graduated in December 2014) Title: Selection
Of Suitable PWM Switching And Control Methods For Modular Multilevel Converter
Drives
21) Emre Kantar: (MSc,
graduated in July 2014) Title: Design and Control of PWM Converter With LCL
Type Filter For Grid Interface of Renewable Energy Systems
20) Semih Kavurucu: (MSc,
graduated in February 2014) Title: Design and Implementation of a 200W Microinverter for Grid Connected Photovoltaic Energy
Conversion System
19) İlker Şahin: (MSc,
graduated in February 2014) Title: Design and Implementation of a Digitally
Controlled 1-kW Interleaved Dc-Dc Step Down Converter With Optimized F-L-N
Values for Higher Power Density
18) Hasan Yılmaz: (MSc, graduated in
September 2012) Title: Design, Application And Comparison Of
Single Stage Flyback And Sepic
PFC AC/DC Converters For Power Led Lighting Application
17) Vahap Volkan Aban: (MSc,
graduated in September 2012) Title: The Design, Control, And Performance
Analysis Of Ac Motor Drives With Front End Diode Rectifier Utilizing Low
Capacitance Dc Bus Capacitor And Comparison With Conventional Drives
16) Ziya Özkan: (MSc, graduated in February 2012) Title: Leakage
Current And Energy Efficiency Analyses Of Single Phase Grid Connected Multi-kva
Transformerless Photovoltaic Inverters
15) Ufuk Ayhan: (MSc,
graduated in February 2012) Title: Investigation
Of Dc Bus Current Harmonics In Two And Three Level Three-phase Inverters
14) Nebi Onur Çetin (MSc,
graduated in July 2010) Title: Design And Implementation Of Advanced Pulse
Width Modulation Techniques And Passive Filters For Voltage Source Inverter
Driven Three-Phase Ac Motors (METU
Best Thesis Award, 2010)
13) Hasan Hüseyin
Eroğlu: (MSc,
graduated in July 2010) Title: Design and Implementation of an Ultracapacitor
Test System
12) Mehmet Can Kaya: (MSc, graduated in September 2008) Title: Design, Implementation, and Control of a Twostage
AC/DC Isolated Power Supply with High Input Power Factor and High Efficiency
11) Fuat Onur Bağlan: (MSc, graduated in August 2008) Title: Design of an
Educational Purpose Multifunctional DC/DC Converter Board
10) Ömer Göksu (MSc,
graduated in May 2008) Title: Shaft Transducerless Vector Control of The
Interıor Permanent Magnet Motor
with Speed and Position Estimation Using
High Frequency Signal Injection and Flux Observer Methods
9) Emre Ün (MSc, graduated in
November 2007) Title: Common Mode Voltage and Current Reduction in Voltage Source
Inverter Driven Three Phase AC Motors (METU Best Thesis Award,
8) Osman Selçuk Şentürk
(MSc,
graduated in September 2007) Title: Series Active Fılter Design, Control,
and Implementation with a Novel Load Voltage Harmonic Extraction Method
7) Hasan Özkaya (MSc, graduated in
June 2007) Title: Parallel Active Filter Design, Control, and
Implementation
6) Eyyüp
Demirkutlu: (MSc, graduated in 2006) Title: Output Voltage Control of a Four-leg Inverter Based
Three-phase UPS By Means of Stationary Frame Resonant Filter Bank
5) Süleyman
Çetinkaya: (MSc, graduated in 2006) Title: Repetitive Control of a Three Phase Uninterruptible
Power Supply With Isolation Transformer
4) Mutlu Uslu: (MSc,
graduated in 2006) Title: Analysis,
Design, and Implementation of a 5 kW Zero Voltage Switching Phase-shifted
Full-bridge DC/DC Converter Based Power Supply for Arc Welding Machines
3) Bülent Üstüntepe:
(MSc, graduated in 2005), Title: A Novel Two-Parameter Modulation and Neutral
Point Potential Control Method For The Three-Level Neutral Point Clamped
Inverter
2) Hazem
Zubi: (MSc, graduated in 2005), Title: Broadband
Harmonic Filter Design for Rectifiers
1) Bilge Şimşir:
(MSc, graduated in 2005), Title: Analysis, Design and Implementation a
Two-switch Single-phase Electronic Line Voltage Regulator
VITAL FOR GRAD STUDENTS:
The following website gives plenty of good advice to make graduate
school life better both for the student and the advisor.
Do You Intend To Pursue a PhD Degree?
Think again! Read the following and reconsider! Everything-you-wanted-to-know-and-you-were-afraid-to-ask...
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