In permanent capacitor motors, the auxiliary winding, like the capacitor, is permanently energized, considering that the capacitor is always of the electrostatic type. The function of this capacitor is to enable adequate flow conditions to be considered very similar to those found in multi-phase electric motors, thereby increasing maximum torque, efficiency and power factor, thus having the ability to reduce noise significantly. For example, blowers, office machines, fans, exhaust fans, centrifugal pumps, grinders, small saws, drills, air conditioners and sprayers, among other equipment can be mentioned.
Considering the constructive factor, this type of motor 101218LF has a smaller size and is normally free of the need for periodic maintenance, since they do not use contacts and moving parts, as in other types of engines found. However, its starting torque is lower than that of the split-phase motor, which can vary between 50% and 100% of the nominal torque, a factor that may be decisive in case it is necessary to limit its application to equipment that does not normally require high starting torque.