Which type of motor requires both starting and run capacitors?

Which type of motor requires both starting and run capacitors?

• A. Shaded pole motor
• B. Capacitor-start motor
• C. Permanent split capacitor motor
• D. Capacitor-start, capacitor-run motor

Answer: (D)

A capacitor-start, capacitor-run motor is designed to utilize both starting and run capacitors for optimal performance. During startup, the starting capacitor provides an additional phase shift in the electric current, which creates a stronger magnetic field and allows the motor to overcome inertia and start effectively. Once the motor reaches operational speed, the run capacitor continues to operate in conjunction with the motor to improve efficiency and performance. This dual-capacitor configuration ensures that the motor has the required torque to start under load and that it operates efficiently during its running phase. The run capacitor maintains a lower phase shift but keeps the motor operating smoothly, reducing fluctuations in speed and improving power factor. While other motor types may utilize capacitors in different ways, the capacitor-start, capacitor-run motor specifically requires both for its starting torque and operational efficiency, making it unique among the various motor types listed.

A capacitor-start, capacitor-run motor is designed to utilize both starting and run capacitors for optimal performance. During startup, the starting capacitor provides an additional phase shift in the electric current, which creates a stronger magnetic field and allows the motor to overcome inertia and start effectively. Once the motor reaches operational speed, the run capacitor continues to operate in conjunction with the motor to improve efficiency and performance.

This dual-capacitor configuration ensures that the motor has the required torque to start under load and that it operates efficiently during its running phase. The run capacitor maintains a lower phase shift but keeps the motor operating smoothly, reducing fluctuations in speed and improving power factor.

While other motor types may utilize capacitors in different ways, the capacitor-start, capacitor-run motor specifically requires both for its starting torque and operational efficiency, making it unique among the various motor types listed.