•   AC Drives ELA18SS02-3005 06.03.2023-30.04.2023  3 credits  (ELA20D-V) +-
    Competence objectives of the study unit
    To provide a basic knowledge of operating principles, commissioning and use of frequency converters.
    Prerequisites
    Power Electronics
    Content of the study unit
    - AC motor
    - the frequency converter
    - motor control
    - commissioning / use of frequency converter
    Assessment criteria
    Failed (0)
    Less than 33.3 % of the total score.
    Assessment criteria – satisfactory (1-2)
    Can describe different ways of converting DC voltage to AC voltage.
    Know about different functional principles.
    Know the advantages and disadvantages of using frequency converters.
    Assessment criteria – good (3-4)
    Can describe how to control the size of the AC voltage.
    Can describe the function at different load requirements.
    Can explain the advantages and disadvantages of using electrical connections.
    Assessment criteria – excellent (5)
    Can explain the operation of the control circuits and make calculations at specific loads.
    Master the calculations of losses when using frequency converters.
    Can describe the appearance of harmonics and what this entails and can describe and calculate filter circuits.
    Name of lecturer(s)

    Ronnie Sundsten

    Learning material

    Facts Worth Knowing about Frequency Converters (Danfoss).
    Manufacturer's information and operating instructions.
    Supplementary material.

    Learning methods

    Lectures
    Practical laboratotry exercises
    Self studies

    Objects, timing and methods of assessment

    Written exam + laboratory report.
    For course grade: At least 33.3 % in the exam (maximum three attempts).

    Teaching language

    Swedish

    Timing

    06.03.2023 - 30.04.2023

    Enrollment date range

    01.12.2022 - 06.03.2023

    Group(s)
    • ELA20D-V
    Responsible unit

    Faculty of Technology and Seafaring

    Small group(s)
    • ELA20-K (Size: 30.
    Teachers and responsibilities

    Jan Berglund

    Degree Programme(s)

    Degree Programme in Electrical Engineering and Automation

    Campus

    Vasa, Wolffskavägen 33

    Assessment scale

    H-5

    Alternative methods of attainment for implementation

    Course exam (50 % of course grades) and report from the practical exercises (50 % of course grades).
    For approved grade, 33.33 % is required in the exam and approved report.

    Exam dates and retake possibilities

    The exam is arranged in week 13.

    Timing and attendance

    Period 4 academic year 2022-2023

    Student's schedule and workload

    A total of 81 hours, of which lectures/exam 12 hours and laboratory exercises 24 hours.

    Assessment criteria
    Failed (0)

    Less than 33.3 % of the total score.

    Assessment criteria – satisfactory (1-2)

    Grade 1: 33.3 % - 47.2 % of the total score.
    Grade 2: 47.3 % - 61.1 % of the total score.

    Assessment criteria – good (3-4)

    Grade 3: 61.2 % - 74.9 % of the total score.
    Grade 4: 75.0 % - 88.8 % of the total score.

    Assessment criteria – excellent (5)

    More than 88.8 % of the total score.