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2021　Electric Machinery and apparatus

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Academic unit or major
Undergraduate major in Electrical and Electronic Engineering
Instructor(s)
Hagiwara Makoto  Kiyota Kyohei 
Class Format
Lecture     
Media-enhanced courses
Day/Period(Room No.)
Tue3-4(S221)  Fri3-4(S221)  
Group
-
Course number
EEE.P301
Credits
2
Academic year
2021
Offered quarter
4Q
Syllabus updated
2021/4/27
Lecture notes updated
-
Language used
Japanese
Access Index

Course description and aims

In this course, students will understand the basic principles of electric–mechanical energy conversion for all widely applied electric machinery and apparatus such as motors and generators.
The study of electric machinery and apparatus has been a significant electrical subject since the days of Edison and Tesla, and is still significant due to its close relationship with subjects of note in recent years such as the global warming issue and hybrid automobiles.

Student learning outcomes

By the end of this course, students will be able to understand the principles and basic structures of DC machines, AC machines, transformers, and reactors, and calculate the basic characteristics of actual instruments.

Corresponding educational goals are:
(1) Specialist skills Fundamental specialist skills
(4) Applied skills (inquisitive thinking and/or problem-finding skills) Organization and analysis
(7) Skills acquiring a wide range of expertise, and expanding it into more advanced and other specialized areas

Keywords

DC machine, induction machine, synchronous machine, permanent magnet machine, motor, generator, transformer, reactor, electro-mechanical energy conversion

Competencies that will be developed

Specialist skills Intercultural skills Communication skills ✔ Critical thinking skills Practical and/or problem-solving skills
✔ ・Applied specialist skills on EEE

Class flow

Classes in this course consist of an outline of the day's lecture, an explanation of circulated materials, the day's quiz and solutions, an explanation of the previous lecture's homework, a lecture, a video showing the inside of electric machinery and apparatus, the results of the previous lecture's questionnaire and a summary of the day's class, a questionnaire, and an explanation of the day's homework.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Electrical apparatus overview, applications, materials, flux and voltage, MMF, reluctance, magnetizing current, inductance Inductance and magnetizing current can be calculated and magnetic circuit can be analyzed.
Class 2 Structure of transformers, equivalent circuit and leakage inductance, resistance, iron loss resistance, magnetizing current, simplified equivalent circuit Equivalent circuit of transformers can be explained.
Class 3 Transformer voltage variation, percentage reactance, loss and efficiency, three-phase system, line-to-line voltage Voltage, current, efficiency and etc. of transformers can be calculated.
Class 4 Reactor, capacitance, magnetic energy, reactor variation, flux linkage and current curves, magnet attractive force, VA, saturable reactor Variations of reactor and simple design procedure can be understood.
Class 5 Magnetic energy and electromagnetic force, linear actuator, magnetic energy, reluctance torque, SR motor, 2 winding Principles of reluctance motor and current relationship can be understood.
Class 6 Fundamental 1 in electric machine, Fleming’s law, coil in magnetic field, armature and brush, principle of dc motor DC motor structure can be drawn and principle can be presented.
Class 7 Fundamental 2 in electric machine, dc brushless motor, 3-phase system, rotating magnetic field, 2-pole and 4-pole, 3-phase Synchronous machine structure can be drawn and principle can be presented.
Class 8 Fundamental 3 in electric machine, operating principles of a 3-phase induction machine, basic structure of windings, energy flow and efficiency Structure of induction machine can be drawn and principles can be presented.
Class 9 DC motor with commutators 1, structure and fundamental of dc motor, excitation methods, excitation methods, basic structure of windings. Structure of dc machine with commutators can be drawn and principles can be presented.
Class 10 DC motor with commutators 2, emf and torque, equivalent circuits, characteristics of dc motor and generator, universal motor EMF and torque of a dc machine can be introduced. Characteristics of dc motor and generator can be presented.
Class 11 Synchronous machine 1, structure of synchronous machines, synchronous impedance, equivalent circuit, armature reaction, output power Synchronous impedance can be introduced. Equivalent circuit can be presented.
Class 12 Synchronous machine 2, short-circuit ratio, parallel operation, excitation methods, characteristics of synchronous motors, V curve, maximum torque control, start-up methods Characteristics of synchronous motor and generator can be presented.
Class 13 Induction motor 1, overview and structure, breakdown of loss, difference between induction machines and dc machines, equivalent circuits, measurement of parameters Characteristics and equivalent circuit of induction machine can be presented.
Class 14 Induction motor 2, characteristics of induction machines with constant voltage and frequency, variable-speed operation of induction machines, three-phase induction generators Characteristics of induction motors based on equivalent circuit can be presented.

Out-of-Class Study Time (Preparation and Review)

To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.

Textbook(s)

Text book: Fukao Tadashi "Electrica apparatus and power electronics", IEEJ university lecture Ohm sha (in Japanese) (ISBN: 9784886862860)

Reference books, course materials, etc.

Reference: Miyairi Shota "latest elecrical apparatus", university lecture series, Maruzen (in Japanese) (ISBN: 978-4621080894)

Assessment criteria and methods

Checkpoint, Midterm report 35%, Final report 35%，First-half activity 15%, Latter-half activity 15%

Related courses

  • EEE.E201 ： Electricity and Magnetism I
  • EEE.E202 ： Electricity and Magnetism II
  • EEE.C201 ： Electric Circuits I
  • EEE.C202 ： Electric Circuits II

Prerequisites (i.e., required knowledge, skills, courses, etc.)

Understanding Electromagnetism and linear circuits is necessary.

Other

This lecture takes internet cloud service Handbook for e-learning and ICT device application, as well as active learning. Quiz, simple exams, home work, questionnaire will be provided through the cloud service. Please bring internet connection devices.

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