Study Guide

Objective

The student:
- understands and is able to explain basic operating principles for motors and generators
- understands and is able to calculate induced voltages, effects and torques
- understands and can explain the structure and basic functions of different types of electric motors and generators
- Can describe applications and technical applications for electric motors and generators
- knows about types of operation and peripherals.

Content

Basic operating principles for motors and generators.
Calculation of induced voltages, effects and torque.
Design and basic functions for different types of electric motors and generators.
Applications and technical applications.
Operating modes and peripherals.

Location and time

Lessons in class and laboratory sessions in Technobothnia according to the schedule in Peppi.
Time for submission of laboratory reports and any additional information: within two weeks after the last lessons according to the schedule.

Materials

Compendiums, degree projects and info from transformer manufacturers.
Info and links are available in Moodle for the course.

Teaching methods

Lectures, calculations, laboratory work and self-study.
Information and study material are presented in Moodle for the course.

Exam schedules

The time for the joint exam and any extra exam is determined in agreement with the students during the course. Lessons in class and laboratory sessions according to the established schedule in Peppi. Laboratory reports are submitted within two weeks of each laboratory.

Completion alternatives

Assessment of assignments, laboratory work, laboratory reports and theoretical tests.

Student workload

A total of 162 hours divided into lessons in class (72 h), laboratory sessions (32 h), self-study and preparation of laboratory reports.

Content scheduling

Theory during weeks 1-14, Laboratory work during weeks 10-17.

Evaluation scale

H-5

Assessment criteria, satisfactory (1)

Knows basic functions and connections for motors and generators.
Can describe the design and characteristics of direct current machines.
Can describe the basic functions of AC motors and generators.
Can name and explain the principle for different special motors

Assessment criteria, good (3)

Can describe the basic functions and make calculations for torque and effects.
Can calculate efficiency and losses at different loads for DC machines.
Can calculate efficiency and losses at different loads for AC machines.
Can describe the operating principles for eg. stepper motors and the limitations of use.

Assessment criteria, excellent (5)

Master the relationship between electrical and mechanical quantities.
Master different control principles for DC machines.
Can calculate and explain the relationships between active and reactive effects and calculate components for phase compensation.
Can describe and compare different types of motors and their advantages and disadvantages for specific applications.

Assessment methods and criteria

The main basis for the grade in the course is determined by the points in the course test. The course test consists of questions that are answered in writing and calculations. (Max 40 points). The laboratory work and the reports are assessed. (Max 20 points)

Assessment criteria, fail (0)

Less than 30% of the total points in the test or omitted laboratory reports.

Assessment criteria, satisfactory (1-2)

Grade 1: 30 - 39% of the total points
Grade 2: 40 - 52% of the total points

Assessment criteria, good (3-4)

Grade 3: 53 - 72% of the total points
Grade 4: 73 - 86% of the total points

Assessment criteria, excellent (5)

Grade 5: 87 - 100% of the total points

Qualifications

Transformers