Two Value Capacitor Motor Running Capacitor Explained

A two-value capacitor motor uses two capacitors: one for starting and one for running. The motor requires specific capacitor types for each function to ensure efficient operation.

Running Capacitor Function

The capacitor used for running purposes must be capable of continuous operation throughout the motor's run cycle. It helps improve the motor's running performance, efficiency, and power factor.

Capacitor Type Selection

Consider the characteristics of each option:

• Air capacitor: Typically used in radio frequency applications or variable tuning circuits, not suitable for continuous motor running duty.
• Paper spaced oil filled type: This type is designed for AC applications requiring continuous duty. The oil dielectric provides good insulation and heat dissipation, making it reliable for long-term operation.
• Ceramic type: Commonly used in electronic circuits for filtering or decoupling due to their small size and specific electrical properties, not suited for motor power circuits.
• A.C. electrolytic type: Primarily used for starting applications due to their high capacitance value but have a limited lifespan and are not designed for continuous running.

Conclusion

The paper spaced oil filled type capacitor is the most appropriate choice for the running function in a two-value capacitor motor because it is specifically designed for continuous AC duty, ensuring reliability and longevity.