i am working on project and i have 3-Phase AC induction motors with the following specificationsstandard voltage 230vFrequency 60 Hertzhow can i increase the RPM of the motor if i have generator produces 230v and has 150 amp?and how can i know what is the frequency that the generator produces?
While induction motors slightly lag the ideal speed, the speed of an AC motor is controlled largely by the frequency of the power used. You can change the speed by changing the frequency. This is done by a device called a Variable Frequency Drive (VFD). Google this for more data. Up to 5HP, you can use singe phase power to drive some of them, with 3 phase output. Above that, almost all are 3 phase in and 3 phase out. I have seen drives with input and output frequencies up to 400hz; some may also run on DC. Most AC motors can be driven at 150% of design speed, many at 200%, with corresponding drops in torque to keep power constant. Over 200%, only a few motors, and up to 400hz is rare. If your generator is 1phase, it puts out 46HP; this is pretty big for 1 phase. If 3 phase, it puts out 140HP. I think you mean 15 Amps. The frequency is designed by the manufacturer; you can use a frequency counter or oscilloscope to measure it. If you are working with a car alternator, know that you can only get 500 to 1000W from it, because it is limited by the physics.
What is the HP of the motors? The frequency of the generator should be marked on it. If not, use an oscilloscope to look at one of the output phases; carefully. The generator must be a 3 phase generator to run the 3 phase motors. There will be 3 hot wires, and a neutral and a ground. The neutral may be missing if this is a delta connection. edit: looking at your last question, it appears that this generator is actually an auto alternator, which will not generate any fixed frequency AC, and will not generate 230 volts. Certainly not 35000 watts! .
You need to know the gear ratio to get the motor speed
