What you have is a constant torque 2 speed motor. At high speed 1760 rpm you have 5 hp, on low speed you have 1.3 hp. Connect it on high. The way a phase converter works is, once a 3 phase motor is up to speed it can maintain it's speed on single phase. Using this, it will become a phase generator. It will generate voltage on the third leg equal to the voltage applied to the other two. Line one and two in reality feed straight through to the three phase motor, the third leg is called the manufactured leg and is fed also the the three phase motor. Because two of the legs are powering the three phase motor at ful power, you can use less horsepower converter to run a larger machine. ( Be aware that any electronics must be run off of the non manufactured leg)
That is one principle, I would prefer to use a larger converter if possible but because of the two legs being fed directly you should be OK. |