Mehta-.pdf !!hot!! - Principles Of Electrical Machines -v.k.
Electricity is invisible. You cannot see magnetic flux lines cutting across a conductor; you cannot see the rotating magnetic field inside a stator. You can only imagine it through mathematics. For decades, the standard textbooks on electrical machines were written by Western authors—brilliant scholars, but often terse and abstract. They assumed a student had an intuitive grasp of high-level calculus and physics.