text: Students Information Park: ELECTRICAL MACHINES - I Second year EEE Syllabus For JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD STUDENTS
  ELECTRICAL MACHINES - I Second year EEE Syllabus For JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD STUDENTS
  Electromechanical Energy conversion – forces and torque in magnetic field systems – energy balance – energy and force in a singly excited magnetic field system, determination of magnetic force - co-energy – multi excited magnetic field systems.
  Methods of Excitation – separately excited and self excited generators – build-up of E.M.F - critical field resistance and critical speed - causes for failure to self excite and remedial measures.
  D.C Motors – Principle of operation – Back E.M.F. - Torque equation – characteristics and application of shunt, series and compound motors – Armature reaction and commutation.
  Testing of d.c. machines: Losses – Constant & Variable losses – calculation of efficiency – condition for maximum efficiency Methods of Testing – direct, indirect and regenerative testing – brake test – Swinburne's test – Hopkinson's test – Field's test – Retardation test – separation of stray losses in a d.c. motor test.