What is the primary advantage of using capacitors in motor starts?

Using capacitors in motor starts primarily enhances the starting torque of the motor. When an electric motor is started, it often requires a significant amount of torque to overcome inertia and begin rotation. Capacitors achieve this by providing a phase shift in the electrical current supplied to the motor. This phase shift creates a stronger magnetic field during startup, which translates into increased starting torque.

This advantage is particularly beneficial in applications where the motor needs to start under load or when a higher starting torque is necessary to get the system moving efficiently and promptly.

Other options like reducing weight, lowering power consumption, or extending motor life may not be direct benefits of using capacitors for starting purposes. Instead, the dominant effect of using capacitors is on improving the motor's performance during the startup phase, resulting in better efficiency and effectiveness in its operational context.