As you see from the wiring diagram, a single-phase motor works on the same principle as 3-phase motors, except they are only run off one-phase. As illustrated below, a single-phase sets up an oscillating magnetic field that goes back and forth rather than a rotating field, resulting in zero starting torque. Since it has a zero starting torque, a single-phase motor also requires a run capacitor that energizes the second-phase winding to create a rotating magnetic field while the motor is running. EdrawMax comes with an import option that allows you to easily import such high-definition images, which you can use to elaborate your points.
