How Do You Use A Three Phase Induction Motor As A Generator?
Three-phase induction motors are plentiful and relatively inexpensive new or used because of their extensive implementation throughout industry. There are several methods for using them as generators, which vary greatly in complexity and advisability for the do-it-yourselfer. The best practical approach is to wire it as you would for a normal motor application, and then to over-run it while it is operating–with an engine, windmill, or turbine to reverse current flow and push power back into the grid. This practice effectively slows the demand meter. Note the three-phase induction motor’s nameplate information including voltage, horsepower rating, and rpm (revolutions per minute). This information will help you correctly match the motor to an external engine or power source that will allow the motor to operate as a generator. Connect the motor’s L1, L2, and L3 (and the ground terminal leads) to the three 208-volt, three-phase power leads and ground, just as if it were a motor applicati
