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Fundamentals of DC Motor

Learn fundamental concept and mathematical representation of DC Shunt & DC Series Motor

Language: English

Instructor: Dr. Jignesh Makwana

Why this course?


Understand “How DC Motor works?” in most simplified way. Course is  designed to help students in understanding fundamental concept and  mathematical derivation. Content delivered here ensures learning new  prospective for students of schools & colleges. “Easy to understand”  and “Every bit to understand” are two basic blocks of this course.

Course Summary

Who this course is for?

  • This course will help 10+ students to understand working principle of DC Motor.

  • This course covers mathematical and scientific detail of DC motor to help engineering students of first year.

  • This course is suitable to all science and technology lovers who wanted to gain the fundamental knowledge about DC motor.

What you’ll learn:

  • You will learn fundamental concept of how dc motor works

  • You will learn mathematical and graphical representation of DC Motor

  • You will learn various speed control methods of DC Motors

  • You will learn DC Shunt and DC Series Motor

  • You will learn various parameters and terms related to DC Motor


  • Basic science (primary school level)

Course Curriculum

Ch 1: Introduction

1.1 Course Intro

Ch 2: Fundamental Concept of How DC Motor Works

2.1 Parameters of Electrical & Mechanical System

2.2 Representation of Electric Motor as Block Diagram

2.3 Force produced by Permanent Magnet

2.4 How electric current produces force?

2.5 Current Carrying Conductors Placed in Magnetic Field

2.6 Requirement of Arrangement to Produce Unidirectional Torque

2.7 How to Supply Electric Current to Rotating Coil

2.8 Maintaining Direction of Current with Commutator

2.9 Conclusion

Ch 3: Basic Parts of DC Motor

3.1 Basic Parts of DC Motor

Ch 4: Back emf & it’s importance

4.1: Role of Faraday’s law and Lenz’s law in DC Motor (Back emf)

Ch 5: Mathematical Representation

5.1: Speed Torque Equation

5.2: Graphical Representation

Ch 6: Speed Control Methods

6.1: Effect of Supply Voltage

6.2: Effect of Adding Resistance to Armature Winding

6.3: Effect of Adding Resistance to Field Winding

Ch 7: Summary

7.1: Summary

Ch 8: DC Series Motor

8.1: DC Series Motor

8.2: Speed Torque Characteristics of DC Series Motor

Ch 9: More about DC Motor

9.1: Introduction

9.2: Controversy Effect: “Effect of Field Flux on Motor Torque” 

9.3: Equation of Force

9.4: Shape and Equation of Back Emf

9.5: Average Value of Back Emf

9.6: Power Transfer

9.7: Shaft Torque

9.8: Applications & Limitations

9.9: Maximum Power Transfer Point

Ch 10: Demonstrations & Practice

10.1: PMDC Motors




Course Preview

Course Instructor

IMG_20180629_025448 - Copy.jpg

Ph.d, IIT Roorkee

In 2013, Dr. Jignesh Makwana earned a Ph.D. in Electrical Engineering from the Indian Institute of Technology Roorkee. Since the previous 15 years, he has been teaching power electronics, electric drives, control systems, and other subjects in engineering colleges. From 2013 until 2017, he was an associate professor and the head of the Electrical Engineering Department at Marwadi University in Rajkot. He currently works as a product design and development consultant for a number of firms in the fields of electric drives and power electronics. He also assists numerous reputable universities in developing engineering curricula and syllabuses as a BOS member.

See what others have to say.....


"Very Good Course. Discussed all of the important concepts without going through unnecessary details"

- William Schwab


- Christine


- Alemseghed


- Ashish Dubey

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Fundamentals of DC Motor

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