BEEE 207 - Rotating Electrical Machines
2025
Regional Maritime University
Marine Electrical / Electronic Engineering Department (MEE)
BEEE 207 – Rotating Electrical Machines (3 Credit Hours)
Course Lecturer
……. Morrison A. Vehe (MSc)
morrison.vehe@rmu.edu.gh
0249340681
RMU, MEE DEPT
BEEE 207 - Rotating Electrical Machines by
Morrison A. Vehe (MSc) – MEE Dept., RMU
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BEEE 207 – Rotating Electrical Machines
Course Objectives
At the end of the course students will:
1. Know the conditions to be fulfilled for the steady production of
electromagnetic torque
2. Learn about the motoring and generating modes of operation with
primary focus on the operation of 3-phase induction machines,
single phase induction motors and synchronous machines
3. Get clear understanding of the concept of rotating magnetic field
and its importance
• to the operation of induction and synchronous machines
BEEE 207 - Rotating Electrical Machines by
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Course Objectives Cont’d
4. Know how to derive equivalent circuits and use same to derive
expressions for torque for each of these machines
5. Learn about starting, speed control and electrical braking of motors
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Course Contents
 Armature winding EMF, and MMF Development, Commutator Windings,
•
A.C. Windings, Winding Factors.
 EMFs Produced by Armature Windings, MMFs Produced by Armature
Windings.
 D.C. Machines Basic theory, Construction, EMF and Torque Equations,
Steady State Characteristics, Efficiency, Starters and
•
their Industrial Control Circuits.
 AC synchronous generators: construction and working principle,
difference between DC generators and AC synchronous generators.
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Course Contents Cont’d
 Polyphase Induction Machines, Basic Theory, Construction, Phasor
Diagrams, Equivalent Circuits,
• Circle Diagram Testing and Efficiency.
 Torque Equations, Power Factor Correction.
• Starting Methods and Their Industrial Control Circuits.
 High Torque Cage motors.
 Permanent Magnet Synchronous Machines: Construction and
working principle,
• Control, Characteristics and Applications;
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Course Contents Cont’d
 Permanent Magnet Brushless DC Motor:
• Construction and working principle,
• Mathematical Model and Characteristics
 Analysis of the Brushless DC Motor,
• Speed Control for Brushless DC Motor Drives,
• Applications of Brushless DC Motor Drives.
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Reference Books and Materials
1. J. Shepherd, A. H. Morton, and L. F. Spence, Higher Electrical
Engineering, England: Addison Wesley Longman Limited, 2002.
2. J. P. Tewari, Basic Electrical Engineering, New Delhi: New Age
International (P) Ltd. Publishers, 2003.
3. B. L. Theraja and V. K. Pandey, Electrical, Electronics and
Telecommunication Engineering, S. Chand & Company Ltd., 2009.
4. V. K. Mehta & Rohit Mehta, Principles of Electrical Machines, S. Chand,
2009.
5. Dr. B. R. Gupta, Generation of Electrical Energy, S. Chand, 2010.
BEEE 207 - Rotating Electrical Machines by
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Reference Books and Materials Cont’d
6. Chang-liang Xia, Permanent magnet brushless DC motor drives and
controls, Wiley, 2012
7. Jacek F. Gieras, Jian-Xin Shen, Modern Permanent Magnet Electric
Machines, CRC Press, 20238.
8. Ramu Krishnan, Permanent Magnet Synchronous and Brushless DC
Motor Drives, CRC Press, 2009
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Mode of Delivery
 This Course will be delivered through:
• Series of lectures,
• Tutorials,
• Group presentations and
• Laboratory sessions.
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Mode of Assessment
 Continuous Assessment
• Class Assignments
• Class Quizzes
• Laboratory work
• Class Attendance & Contributions
• Group presentation/project
 End of semester examination
 Total
 Pass Mark
BEEE 207 - Rotating Electrical Machines by
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[40 %]
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[60 %]
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[100 %]
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[45 %]
Morrison A. Vehe (MSc) – MEE Dept., RMU
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D.C. Machines
Introduction
 Electrical Machines: electrical machines are energy converting devices
and may fall under any one of the following categories:
 Mechanical to electrical energy - generators
 Electrical to mechanical energy - motors
 Electrical to electrical energy – transformers
 The first two are referred to as rotating electrical machines and are further
classified into A.C. or D.C. machines. Although, a large percentage of
electrical machines in use are a.c. machines, the D.C. machines are of
considerable industrial importance.
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D.C. Machines
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D.C. Machines
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D.C. Machines
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D.C. Machines
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D.C. Machines
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D.C. Machines
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D.C. Machines
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D.C. Machines
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