Split Phase Motor Diagram. The auxiliary winding is also known as starting winding. I Run is the current in the main winding and I Start is the current in the starting winding.
It has 2 contacts for the run winding and it has a black and red wire hanging out of the housing which I assume are for the start winding. The angle between the two currents is f as shown in the figure. Single phase motors are not self-starting as the supply voltage is not producing a rotating magnetic field.
Now the torque produced is such that it gives circular movement to the rotor.
Also known as a capacitor-run motor this type of motor uses a non-polarized capacitor with a high voltage rating to generate an electrical phase shift between the run and start windings. Red _ ungrounded side of line----- o-----. The starting winding is displaced 90 electrical from the main winding and operates only during the brief period when the motor starts up. The current in the main winding I M lag behind the supply voltage V almost by the 90-degree angle.
