A few advantages for us is, Faster startup which means a lower startup cost. Lower initial cost of motor. They have less components, (capacitors, centrifigal switches)therefore less to go wrong.
If you have 480v service and use 3phase 460v motors, they do not have to go thru your own transformers thereby eliminating unnecessary load an transformers.
I know there are more. these are just a few of the benefits we see in our plant.
