In a compressor, a run winding has what relative resistance compared to the start winding?

In a compressor, a run winding has what relative resistance compared to the start winding?

• A. More
• B. Less
• C. Equal
• D. Higher

Answer: (B)

The run winding is designed for continuous operation and needs to carry the motor current efficiently. To achieve that, it has lower resistance than the start winding. The start winding is used only to get the compressor started and is paired with a capacitor to create the necessary phase shift; its higher resistance helps limit the starting current and control the torque during startup. After the compressor reaches speed, the starting path is removed, leaving the run winding as the only active winding.

The run winding is designed for continuous operation and needs to carry the motor current efficiently. To achieve that, it has lower resistance than the start winding. The start winding is used only to get the compressor started and is paired with a capacitor to create the necessary phase shift; its higher resistance helps limit the starting current and control the torque during startup. After the compressor reaches speed, the starting path is removed, leaving the run winding as the only active winding.