There's what I was looking for
A static phase converter is a startup device for three phase motors running on single phase power. They generate three phase power only long enough for the motor to start up, not continuously like a rotary phase converter would. Once the three phase motor has started up, the static phase converter circuitry disconnects itself, and the motor continuse to run on single phase power. Two of the three windings receive power during running, so horsepower output is reduced to between 2/3 to 1/2 of the rated motor horsepower. For example, a 20 HP motor will start with the power of a 20 HP motor but run as a 10 HP motor.
