Final answer:
The Two value capacitor motor's good running characteristics are attributed to its dual capacitors, which provide a necessary phase shift for starting torque and efficiency, as well as reducing back emf and eddy currents for smoother operation.
Step-by-step explanation:
The good running characteristics of the Two value capacitor motor come from its ability to have a capacitive reactance which provides a phase shift to the motor currents, thus creating a starting torque and improving motor efficiency. These motors use two capacitors: a 'start' capacitor for high starting torque and a 'run' capacitor to maintain running efficiency once operational. The start capacitor has a higher capacitance and is disconnected by a switch once the motor reaches a certain speed.
The two capacitors enable better control over the magnetic fields within the motor, which in turn provides a smoother operation and less electrical noise. They also help in reducing back emf effects and minimizing the generation of eddy currents, increasing the efficiency and longevity of the motor. Generally, the size and applied voltage of the capacitors are designed according to the motor's needs to ensure optimal performance and capacity to store charge.