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# Alternating Current Circuits

Structure Type: Study unit IST3002 ST 2021 Bachelor of Engineering 1 (2021-2022) 3 cr Mäkinen, Seppo Finnish

## Courses During the Academic Year 2021-2022

Impl.Group(s)Study TimeTeacher(s)LanguageEnrolment
3002ST2021-1, ST2021-1A, ST2021-1B, ST2021-1C, ST2021-1D2022-01-03 – 2022-02-27Matti Niskala, Seppo MäkinenFinnish2021-12-01 – 2022-01-10

## Learning Outcomes

The student is introduced to induction phenomenon and the basics of AC theory and learns to solve basic problems on alternating currents.

The total amount of student's work is 84 h, which contains 42 h of contact studies.

## Prerequisites / Recommended Optional Courses

IST2003 Electricity and Magnetism 1
IST2004 Direct Current Circuits

## Contents

Generation of AC power from mechanical energy. Induktion and induktance. Principle of a transformer and generation of iron losses appearing in electric machines. Intstantaneous value, mean value and effective value. Describing sinusoidal AC power with a rotating indicator and with a effective value indicator. Behavior of resistance, induktance and capasitance in AC circuit. RC, RL and RLC circuits.

## Recommended or Required Reading and Other Learning Resources/Tools

Heikki Esala: Teoreettinen Sähkötekniikka 1 (chapters 3-4 and formula collection) in pdf-format

## Mode of Delivery / Planned Learning Activities and Teaching Methods

The AC theory and it appliance in practice is first looked into during lectures. After this, the students independently apply the learnt skills by solving practical calculations and assignments. The solutions to the calculations and assignments are gone through during lessons.

## Assessment Criteria

Grade 5: The student is able to apply creatively the contents of the course.

Grade 3: The student is well-abled to utilize the course contents.

Grade 1: The student knows those subjects of the course, which are necessary for the forthcoming studies and working life.

## Assessment Methods

Exam and activity demonstrated in calculations and assignments.

## Further Information

Responsible organization: VAMK