Study Guide

Objective

The student:
- knows the main parts of the frequency converter
- knows the operating principle of the frequency converter
- knows the commissioning and use of a the frequency converter.

Content

- AC motor
- the frequency converter
- motor control
- commissioning / use of frequency converter

Materials

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

Teaching methods

Lectures
Practical laboratotry exercises
Self studies

Completion alternatives

Course exam (50 % of course grades) and report from the practical exercises (50 % of course grades).

Student workload

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

Evaluation scale

H-5

Assessment criteria, satisfactory (1)

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)

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.

Assessment methods and criteria

Written exam + laboratory report.

Assessment criteria, fail (0)

Less than 50% of the total score.

Assessment criteria, satisfactory (1-2)

More than 50% of the total score.

Assessment criteria, good (3-4)

More than 70% of the total score.

Assessment criteria, excellent (5)

More than 90% of the total score.

Qualifications

Power Electronics