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

    címtáras azonosítással

    vissza a tantárgylistához   nyomtatható verzió    

    Laboratory of Specialisation

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

    Last updated: 2015. február 23.

    Budapest University of Technology and Economics
    Faculty of Electrical Engineering and Informatics
    Course ID Semester Assessment Credit Tantárgyfélév
    VIVEAC07 6 0/0/3/f 4  
    3. Course coordinator and department Dr. Számel László,
    5. Required knowledge

    Obtaining of base knowledge in the field of electrotechnics and electrical energetics in accordance with general technical program and in technical program for specialization.

    6. Pre-requisites
    (Szakirany("AVINvillgephajt", _)
    VAGY Szakirany("AVIvillen", _) VAGY
    Szakirany("VIABV-SUSTEN", _) )

    ÉS NEM ( TárgyEredmény( "BMEVIVEA337" , "jegy" , _ ) >= 2
    TárgyEredmény("BMEVIVEA337", "FELVETEL", AktualisFelev()) > 0)

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

    A kötelező előtanulmányi rendek grafikus formában itt láthatók.


    According to actual directives, included in Specialization and Department Regulation. Credits of course of Electrical Machines and Applications are advised to be obtained.

    7. Objectives, learning outcomes and obtained knowledge

    Elaborating of theoretical and practical knowledge, co-ordination of physical and computational models, promotion of practical skills.

    Studying line interactions and arcing phenomenon in switchgears in laboratory conditions, comparison of measured results with the theoretical ones.

    Practical study of several types of electrical motors and drives, based on different principles of operation. Laboratory practices supplement and support theoretical courses of the specialty.

    8. Synopsis

    In the field of electrical energy systems


    Line reaction of electric equipment 

    Measurement, calculation, and technical evaluation of  energy quality parameters by standard methods


    Overcurrent protection

    Calculation of protection device adjustment. Modelling and testing of the network in cases of short-circuits of different types.

    In the field of switchgears and equipments


    Ideal switch-off of DC and AC faults.

    Calculation and measurement of voltage appearing between the contacts of a switch


     Investigation of the electric arc and arc interruption        

    Measurement of the voltage-current and voltage-length characteristics and comparison to calculation results obtained from arc models. Interruption of AC and DC arc.


    Investigation of the operation of fuses and miniature circuit breakers.    

    Measuring the characteristics of a fuse model and a miniature circuit breaker.


    In the field of the electrical machines:


    Investigation of induction machines

    Measurments of  the no-load and short-circuit parameters and diagrams of the induction motor. Real load motor measurements.


    Investigation  of the synchronous machines

    Measurements of  the no-load and short-circuit parameters and diagrams of the synchronous machine. Line synchronization of the rotating synchronous generator.  Measurement of the V-curves and current diagram


    Investigation of DC motor

    Measurement of output characteristic of a DC generator. Measurement of the mechanical (speed- moment) characteristic of a DC motor with auxiliary excitation. Measurement of efficiency of the whole motor-generator group.


    Investigation of three-phase transformers

    Specifying of the one-phase equivalent circuit of three-phase transformers. Measurement of the no-load and short-circuit parameters of three-phase transformers. Identifying the connection group of the transformer. Investigation of the near-saturation and transient behavior.


    In the field of electric drives


    Investigation of chopper-fed DC servo drive

    Investigation of the controlled DC servo drive. Measurement of the load performance of the drive.  The influence of current limitation on the drive behavior.


    Investigation of four-quadrant DC drive

    Measurement of line-commutated, phase-controlled converter  DC drive. Converters without circulating current. Process of commutation. Investigation of the four-quadrant modes on the input AC and output DC sides


    Investigation  of frequency converter fed induction motor drive

    Three-phase Park vector analysis by means of oscilloscope. Open-loop (U/f) control method. PWM technics and their analysis. Comparison of the open-loop and closed-loop control strategies.

    9. Method of instruction

    Laboratory measurement are 3 hours long 12 times in the semester, with one opportunity for supplement measurement

    10. Assessment

    In accordance with th Laboratory Regulations  it is obligatory:

    Study the measurement guides

    • Presence and correct group activity in the pointed place and time
    • Students shall be prepared, their knowledge will be controlled by the Lecturer
    • Individual or group measurement documentation  should be made in electronic form and sent to the Lecturer until the pointed deadline.

    .Every laboratory practice result in an individual mark. The minimal requirement of successful semester is the rather weak mean of all the marks. 

    11. Recaps

    Maximum two opportunities are provided in one semester for supplement failed measurements (typically the last week before the end of semester)

    12. Consultations

    Consultation time is available on-demand after preliminary agreement

    13. References, textbooks and resources

    Laboratory measurement programs are based on measurement guides in electronic form, supplied on the department’s homepage.

    14. Required learning hours and assignment

    Contact hours


    Preparation work for lab measurements


    Measurement documentation work