How to convert an 3phase electric motor to a 3phase generators?
A 3-phase permanent magnet synchronous motor can be used as a generator simply by attaching something that will turn the shaft and connecting a load to the motor terminals. The terminal voltage and frequency will be proportional to the speed at which the shaft is turned. The voltage will vary somewhat as the load changes. This type of motor is not very common. A synchronous motor that has a DC power supply connected to the rotor through slip rings can be used as a generator in the same way. A battery or some other independent DC power source is required at least to get the generator started. An automotive alternator works that way. This type of motor is usually only manufactured in very large sizes. By far, the most common type of motor is the 3-phase induction motor. In a 3-phase induction motor, the energy in the magnetic field is constantly circulating back and forth between the power source and the motor. In order to operate as a generator, a source is required for the circulating
