Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

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    Electrical Machines and Applications

    A tantárgy neve magyarul / Name of the subject in Hungarian: Villamos gépek és alkalmazások

    Last updated: 2021. március 17.

    Budapest University of Technology and Economics
    Faculty of Electrical Engineering and Informatics


    BSc Electrical Engineering

    Sustainable Power Engineering Specialisation
    Course ID Semester Assessment Credit Tantárgyfélév
    VIVEAC01 5 2/1/0/v 4  
    3. Course coordinator and department Dr. Veszprémi Károly,
    4. Instructors

    Dr.Károly Veszprémi Professor, Department of Electric Power Engineering


    5. Required knowledge Elektrotechnics, power engineering
    6. Pre-requisites
    Kötelező:
    ((Szakirany("AVINsmartgrid", _) VAGY
    Szakirany("AVINvillgephajt", _) VAGY
    Szakirany("AVINvillszigr", _) VAGY
    Szakirany("AVIvillen", _))VAGY
    Szakirany("VIABV-SUSTEN", _) )




    ÉS NEM ( TárgyEredmény( "BMEVIVEA334" , "jegy" , _ ) >= 2
    VAGY
    TárgyEredmény("BMEVIVEA334", "FELVETEL", AktualisFelev()) > 0)

    A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.

    A kötelező előtanulmányi rend az adott szak honlapján és képzési programjában található.

    7. Objectives, learning outcomes and obtained knowledge

    To teach those knowledge in the field of electrical machines and drives, which are necessary in the Electrical Energetics specialisation. Presents the practical calculation methods, the operation of the electrical machines systems. Describes the usual, modern and prospective applications. 

    8. Synopsis

    Transformers

    Single-phase and 3-phase transformers. Steady-state and transient operation. Unbalanced load of the 3-phase transformers. Special transformers.

    Windings of the rotation machines, torque development

    Concentrated and distributed winding (slots). The induced voltage, the developed air-gap filed, the stray field. Force and torque development and calculation.

    Induction machines

    Equivalent circuit and torque development. Deep-slot and double-slot rotors. Effect of the spatial harmonics. Starting and speed modification methods. Asymmetric operation, stator and rotor asymmetry. Single-phase and auxiliary-phase machines.

    Synchronous machines

    Cylindrical rotor case: Equivalent circuit and torque development. Motor and generator operation. Stability. Effect of the salient-pole. Reluctance machines. Permanent-magnet machines. Synchronous and induction linear machines.

    DC machines

    Armature windings. The role of the auxiliary and compensating windings. Separate, parallel and mixed excitation, characteristics. Starting and speed modification.

    Modern calculation methods

    Finite element method (FEM). Poisson equation. Lagrange interpolation polynom. Dirichlet and Neumann conditions. Simple 2D promlem. Presentation of the QuickField, Flux2D and Motorpro, MotorCad software.

    Applications of electrical machines

    Household electrical machines. Electrical machines in consumer electronics. Electrical machines in vehicles. Magnetically levitated trains. Superconducting generators and motors. Servo motors.

    Kinetics of electrical drives

    Reduction of torques and masses to common shaft. Motion equation of the electrical drives. Stability criterion of drives. Definition of time constants.

    Design of electrical drive

    Protection levels. Operation condition of electrical motors. Thermal conditions. Selection of electrical motors.

    Applications of electrical drives

    Speed modification and braking methods of DC urban electrical vehicles. Voltage source inverter-fed induction machine driven trolley-bus. Semiconductor-based DC drive driven trains. Inverter-fed trains. Wind generators.

    The practices:

    ·         Calculation of electromagnetic forces

    ·         Single-phase transformers

    ·         Parallel operation of transformers

    ·         Connections of transformers

    ·         3-phase transformers

    ·         AC windings

    ·         Calculation of the induced voltage

    ·         Steady-state operation of induction machines

    ·         Starting of induction machines

    ·         Steady-state operation of synchronous machines

    9. Method of instruction 2 lectures, 1 practice per week
    10. Assessment

    During the semester: passing one midterm test

    In the exam period: written exam with possible oral exam improvement

    11. Recaps Midterm test can be rewritten once during the semester and once during the repeat period.
    12. Consultations At time and date agreed by the lecturers. 
    13. References, textbooks and resources

    Lecture notes from the webpage of the department.

    14. Required learning hours and assignment

    Contact hours

    42

    Preparation for contact hours

    14

    Preparation for the midterm

    15

    Learning at home

     

    Preparation for the practices

     10

    Homework assignments

    0

    Preparation for the exam

    39

    Total workload

    120
    15. Syllabus prepared by

    Dr.Károly Veszprémi Professor, Department of Electric Power Engineering

    Dr.István Vajda Professor,  Department of Electric Power Engineering