Design Of Electric Motors

By Prof. Prathap Reddy | IISc Bangalore

Learners enrolled: 4271 | Exam registration: 401

ABOUT THE COURSE:

Electrical machines are the driving force for the modern world in one or another way. The main objective of this course is to understand the design of electrical machines with respect to different applications. This course starts with the principle of the electromagnetics and design of electromagnets. Once the students are familiar with the electromagnetic principle, the realization of the electrical machines and winding designs will be discussed. Afterwards, the generic design of rotating machines with respect to sizing equations, Winding volume product, electric loading, magnetic loading and geometrical construction and density will be discussed. Further, the design of induction machines switched reluctance machines and thermal design procedure for electrical machines will be discussed in detail.

INTENDED AUDIENCE: Electrical Engineering students

PREREQUISITES: Basics of Electrical Machines and Electromagnetics

INDUSTRY SUPPORT: All Electric Motor Companies and EV Companies

Summary

Course Status :	Completed
Course Type :	Elective
Language for course content :	English
Duration :	12 weeks
Category :	Electrical, Electronics and Communications Engineering Power Systems and Power Electronics
Credit Points :	3
Level :	Undergraduate/Postgraduate
Start Date :	24 Jul 2023
End Date :	13 Oct 2023
Enrollment Ends :	07 Aug 2023
Exam Registration Ends :	18 Aug 2023
Exam Date :	29 Oct 2023 IST

Note: This exam date is subject to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1: Lecture 1: Electric Fields, Magnetic Fields, Review of Electromagnetic laws (Ohms Law, Amperes Law, Faraday’s Laws, Thumb rule, Fleming’s Left-hand and Right-hand rules, Lorentz Force Law)

Lecture 2: Magnetic Materials and Concepts of BH Curves

Lecture 3: Magnetic Circuits with and without Air gaps

Week 2: Lecture 4: Multiple Winding Magnetic Circuits

Lecture 5: Electromechanical Energy Conversion and Force in Electromagnetic Systems

Lecture 6: Design and Analysis of the Electromagnetic System with an Example

Week 3: Lecture 7: Realization of Electrical Machines with the Principles of Electromagnets

Lecture 8: Working Principles of the Rotating Machines

Lecture 9: Design of Electrical Windings and MMF distribution

Week 4: Lecture 10: DC Machine Windings.

Lecture 11: AC Machine Windings

Lecture 12: AC Machine Windings

Week 5: Lecture 13: AC Machine Windings Examples with Laboratory Prototype

Lecture 14: Winding Design for Variable Speed Machines

Lecture 15: Importance, Design Factors and Standards of the Electrical Machines

Week 6: Lecture 16: Electric and Magnetic Loadings

Lecture 17: Sizing Equations with D2L (Volume) Product

Lecture 18: Sizing Equations with D3L (Volume) Product-I

Week 7: Lecture 19: Sizing Equations with D3L (Volume) Product-II

Lecture 20: Volume, Power Density

Lecture 21: Induction Motor (IM) Design, Main dimensions

Week 8: Lecture 22: Stator Core Design of IM

Lecture 23: Rotor Core Design of IM

Lecture 24: Volume and Density of IM

Week 9: Lecture 25: IM Parameters Calculation like Leakage and Magnetizing Inductances-I

Lecture 26: IM Parameters Calculation like Leakage and Magnetizing Inductances-II

Lecture 27: Efficiency Calculations

Week 10: Lecture 28: Design of the Induction Motor for an Electric Vehicle Application

Lecture 29: Design of Special Machines

Lecture 30: Switched Reluctance Machine (SRM) Sizing Equations

Week 11: Lecture 31: Stator and Rotor Design of SRM

Lecture 32: Machine Parameters of SRM

Lecture 33: Efficiency Calculations of SRM

Week 12: Lecture 34: Thermal Issues, Limits and Heat Transfer Techniques

Lecture 35: Cooling Methods and Design, Thermal Equivalent Circuits

Lecture 36: Thermal Design of Electrical Machines

Books and references

Thomas A. Lipo, Introduction to AC Machine Design, IEEE Press, John Wiley & Sons, Inc., NJ, USA.
Alexander Gray, Electrical Machine Design - The Design And Specification Of Direct And Alternating Current Machinery, Mc Graw Hill, NY, USA.
Krishnan, R., Switched Reluctance Motor Drives: Modeling, Simulation, Analysis, Design, and Applications, CRC Press, USA.
Juha Pyrhonen, Tapani Jokinen, Valeria Hrabovcova, Design of Rotating Electrical Machines, Second Edition, John Wiley & Sons Ltd, West Sussex, UK.
A. K. Sawhney, “A Course in Electrical Machine Design”, Dhanpat Rai and Sons, 1970.

Instructor bio

Prof. Prathap Reddy

IISc Bangalore

Prof.B. Prathap Reddy, currently working as a DST Inspire Faculty at the Department of Electronic System Engineering at IISC, Bengaluru. He received the Ph.D. degree in Power Electronics and Drives from the Indian Institute of Technology Hyderabad, India in 2019. During his Ph.D., received the Excellence in Research Award, and Appreciation in Research Awards for the years 2018 and 2019, respectively at IIT Hyderabad, India. He worked as a Postdoctoral Research Fellow in the Department of Electrical Engineering at Qatar University, Qatar from May 2019 to July 2021. He received the INAE Young Engineer Award for the year 2022, from INAE, India. He is also an INAE young Associate from the year 2022.His research interests include pole phase modulation techniques for electric drives, multiphase machines, charging solutions, electric machine design, multilevel inverters, DC-DC converters, open-end winding induction motor drives and pulse width modulation techniques.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.

The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).

Date and Time of Exams: 29 October 2023 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.

Registration url: Announcements will be made when the registration form is open for registrations.

The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.

Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IISc Bangalore .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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