Capacitor-Start Induction Run AC Motor:

A capacitor-start induction run AC motor is a type of single-phase induction motor commonly used in various applications such as refrigerators, air conditioners, compressors, and pumps. It consists of two windings - a main or running winding and a starting winding. The capacitor is connected in series with the starting winding to improve the motor's starting torque and efficiency.

Role of Starting Winding:

The starting winding is a high-resistance winding that is placed at a 90-degree angle to the main winding. During starting, the capacitor is energized, and the starting winding produces a magnetic field that interacts with the main winding's magnetic field to produce a rotating magnetic field. This field causes the rotor to start rotating in the same direction as the rotating magnetic field.

Role of Capacitor:

The capacitor stores electrical energy and releases it in a phase-shifted manner to the starting winding. This helps to create a phase difference between the current in the starting winding and the current in the main winding. The phase difference produces a rotating magnetic field that is necessary to start the motor.

Connection of Capacitor:

The capacitor is connected in series with the starting winding to ensure that the voltage across the starting winding is higher than the voltage across the main winding. This helps to create a phase difference between the two windings and produce the necessary rotating magnetic field.

Conclusion:

Hence, we can conclude that the capacitor in a capacitor-start induction run AC motor is connected in series with the starting winding to improve the motor's starting torque and efficiency.