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:: Vahid Behjat ::

Department of Electrical Engineering, Iran University of Science & Technology, Tehran, Iran.

Tel: +98-914-316-2492

E-mail: Vahid_Behjat@ee.iust.ac.ir

Department of Electrical Engineering, Iran University of Science & Technology (IUST), Tehran, Iran.

Tel: +98 914 316 2492

E-mail: Vahid_Behjat@ee.iust.ac.ir

Vahid Behjat

Research Interests

• Design and Analysis of Power Transformers

• Finite Element Method Applications in Electrical Engineering

• Simulation of Electric Machinery

• Power System, Generation & Operation

• MEMS Electrostatic Actuators

Education

[ 2004, 2009:Expected ] IUST Tehran, Iran

Ph.D. in Electrical Engineering – Electric Machinery

• GPA (Courses Only): 15.80/20

[ 2002-2004 ] IUST Tehran, Iran

M.Sc. in Electrical Engineering - Electric Machinery

• GPA: 17.60/20

[1998-2002 ] University of Tabriz, Tabriz, Iran

B.Sc. in Electrical Engineering –Power

• Major: Power engineering

• GPA: 16/20

[ 1994-1998 ] Ferdowsi School Tabriz, Iran

Pre-University Certificate

• Major: Mathematics and Physics

• GPA: 19/20

M.Sc. Thesis

• Thesis title: Modeling and Simulation of the MEMS Electrostatic Micromotor and Consideration the Geometry Effects on its Characteristics

• Supervisor: Dr. Abolfazl Vahedi (IUST),

• Thesis Overview:

In this thesis, a practical design of a MEMS electrostatic synchronous micromotor has been analyzed, using 2-D numerical finite element method. The electric field, voltage distribution, as well as electrostatic energy obtained by means of 2-D finite element analysis. The electrostatic torque has been calculated as a function of rotor position and its average and ripple components have been determined. A problem with the electrostatic micro motor is that it has very pulsating torque and the ripple component of the driving torque has a considerable value, so it is difficult to achieve large electrostatic torques. To generate large torques which will do the useful work of the device, an optimal excitation sequence and an optimal geometric structure are required. In order to maximize the driving torque, several excitation sequences have been studied and finally the optimal excitation sequence has been selected for supplying the micro motor. The device geometry has a considerable influence on the torque of the electrostatic micro motor. It has been shown in this thesis, how average and ripple components of the electrostatic torque vary vs. geometric parameters variation. Also, optimal values for some geometric parameters have been found.

Honors and Awards

  • Ranked amongst the top 1 percent of all the participants in universities’ nationwide entrance exam for undergraduate studies. (Konkoor), 1998.
  • Second rank among the graduated B.S. students of electrical engineering, University of Tabriz, Department of Electrical Engineering, May 2002
  • Ranked amongst the top 5 percent of all the participants in universities’ nationwide entrance exam for graduate studies in Electrical Eng, 2002.

    Publications

  • V. Behjat, A. Vahedi, “Minimizing the torque ripple of variable capacitance electrostatic micromotors”, Journal of Electrostatics (Elsevier). No. 64, pp. 361-367, 2006.
  • V. Behjat, A. Vahedi, “Study the influence of geometric parameters on the torque of the electrostatic micromotors”, Journal of Electrical Engineering (Springer), 2006.
  • V. Behjat, A. Vahedi, “Study Torque Ripple of the Side-Drive Micromotors”, UPEC Conference, Bristol-England, Sep. 2004.
  • V. Behjat, A. Vahedi, “Study the Influence of Geometric Parameters on the Torque of MEMS Micromotors”, ICEM Conference, Krakow-Poland, Sep. 2004
  • V. Behjat, A. Vahedi, “Analysis of Electrostatic Synchronous Micromotors Using Finite Elements Method”, Agean Conference on Electrical Machines and Power Systems, Istanbul-Turkey, May 2004.
  • V. Behjat, M.B. Sharifian, “ Optimal control of Reactive Power Using the Exciting Standard Capacitor Banks”, 18 th International Conference on Power Systems, Tehran-Iran, Oct. 2003
  • V. Behajt, A. Gholami, “Assessment of Composite Insulators in Power Systems” , 2 nd National Seminar on Insulators, Tehran-Iran, Jan. 2004

    Presentations

  • V. Behjat, “Finite Element Method Applications in Electrical Engineering”, Iran University of Science & Technology, November, 2005.
  • V. Behjat, A. Vahedi, “Analysis of Electrostatic Synchronous Micromotors Using Finite Elements Method”, Agean Conference on Electrical Machines and Power Systems, Istanbul-Turkey, May 2004.

    Accomplished Projects and Term Papers

  • Numerical Solution of Electric and Magnetic Fields: analysis of a three phase power transformer using finite element method.
  • Dynamic Simulation of Electric Machinery: Performance analysis of three phase Induction Motor fed by unbalanced voltage.
  • Fuzzy Systems and Control: Position control of DC servomotor using fuzzy controller.
  • Neural Networks: Neural Network-Based parameter identification of synchronous reluctance machine.
  • Power Generation and Operation: Economic dispatch considering system security and generators constraints using particle swarm optimization method.
  • Reactive Power Control in Electric Systems: Optimal control of reactive power using H&G optimization method
  • M.Sc. Seminar: MEMS Actuators

    Additional professional activities and memberships

    [ 10/04-10/05 ] Iran Transformer Research Institute, Tehran, Iran.

    • Designer of Power Transformers.

    [ 02/03-09/04 ] Department of High Tech. Industries, Ministry of Industry and Mines, Tehran, Iran.

    • Researcher in the area of MEMS Actuators.

    [ 06/01-09/01 ] Tabriz Refinery Power Station, Tabriz, Iran.

    • Summer Internship Student

    Teaching experiences

  • Teaching assistantship for Electric Machinery (III) - IUST-spring 2006
  • Teaching assistantship for General Theory of Electrical Machines- IUST- Continuously from fall 2004

    Certificate

    Programs

    • Building of combined cycle power plants, Total Company.

    Learned to develop and plan combined cycle power plants

    Computer Skills

  • Programming Language: Qbasic, C
  • Software Packages: FLUX (FEM), ANSYS (FEM), OPERA (FEM), MATLAB and SIMULINK, Microsoft Office (Excel, Word, Power Point).
  • Operating Systems : Windows XP , Vista

    Languages

    • English (Fluent)

    • Turkish (Mother Tongue)

    • Persian (National Language)

    Interests and activities

    • Folk Music

    • Reading: Literature, psychology, History

    • Sports: Mountain Climbing, Swimming

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