Induction Machines

This work offers a study of the fundamentals of induction machine design and application. Starting with the first principles of electric circuits, the transformer, magnetic energy storage and the virtual displacement method of calculating magnetic forces, the equivalent circuit of a motor is developed, and the formulas for performance calculations are derived. Basic formulas for torque and output are included, and extensive consideration is given to the fundamental and harmonic magnetic fields produced in the air gap by various types of winding. The topics of speed-torque-current relations, crawling and locking phenomena, magnetic noise, and the rating and application of motors are also covered.