"Principles of Electrical Machines" by V.K. Mehta and Rohit Mehta is a widely used textbook covering essential topics like transformers, DC machines, and synchronous machines for engineering students. The text is recognized for its clear, step-by-step approach to explaining complex electromagnetic principles and practical applications. For a summary of the book, visit Amazon. Principles of Electrical Machines, VK Mehta - Amazon.com
The story of V.K. Mehta’s Principles of Electrical Machines is not one of high drama or sudden fortune. It is a quiet, persistent story about how one man’s dedication to clarity transformed the way an entire generation of engineers learned to see the invisible forces powering the world.
Here is the story of the book that became the "Bible" for Indian engineering students. Principles Of Electrical Machines -v.k. Mehta-.pdf
The Induction Motor section addresses the workhorse of modern industry. The book excels in explaining the concept of Slip—the fundamental difference between the synchronous speed of the magnetic field and the actual rotor speed.
It provides a lucid explanation of the equivalent circuit of the induction motor, a topic that often confuses students due to the complexity of referring rotor parameters to the stator side. The text also details torque-slip characteristics, starting methods (like Star-Delta starters), and speed control techniques, providing a holistic view of how these machines operate in the real world. "Principles of Electrical Machines" by V
For many students, the transition from static devices (transformers) to rotating machines (DC generators and motors) is a steep learning curve. V.K. Mehta smooths this transition by focusing on the Action of the Commutator.
The book breaks down the operation of DC generators by explaining how armature reaction distorts the main field and how interpoles are used to neutralize this effect. The section on DC Motors is particularly insightful regarding torque-speed characteristics, offering clear derivations for the relationships between back EMF, armature current, and mechanical output. The explanations of starters and speed control methods remain highly relevant for industrial applications. Generator Action: When a conductor cuts magnetic flux,
Occasionally, Internet Archive (archive.org) has loanable digital copies (borrow for 1 hour/14 days). This is 100% legal.