The first category, then there is no centrifugal switch […]
The first category, then there is no centrifugal switch, a single capacitor phase-shifting, such as fans, which are usually used on small motors
The second category, there is a centrifugal switch, a single capacitor phase-shift start-up, such as some fans and other equipment, but for various reasons, the motor seems to be less and less. But in some special places, he still exists.
The third category, that is, there is a centrifugal switch, dual-capacitor dual-phase shift type, the most common in many places, such as air compressors, cutting machines, bench drill and other places.