For induction motor builds and experiments, a suitable power supply unit (PSU) is an AC motor drive, which can provide multiple outputs and phase control. Hobbyists are increasingly using three-phase appliance motors for generator applications, enhancing their versatility. The Fisher Paykel PMG is mentioned as a relevant example for those interested in this area. The discussion emphasizes the need for a bench-top system capable of supplying out-of-phase outputs. Overall, selecting the right PSU is crucial for successful experimentation with induction motors.