The document summarizes the working principle, construction, and types of single-phase induction motors. It discusses the double revolving field theory to explain how the motor operates using a pulsating magnetic field divided into forward and reverse rotating fields. It describes the construction as similar to three-phase motors with a squirrel cage rotor. The main types covered are split-phase, capacitor-start, capacitor-start capacitor-run, two-value capacitor, and shaded-pole motors.