Re: Ebay 3 phase motor find
The supposed risk of using an ordinary 3ph motor is not so much the freq, all though this is important, the supposed risk is due to the nature of the high frequency pulses that the sine wave is made up from.
Incidentally, over the years, all the VFD/Motor control I have implemented has been with old style, non (VFD) rated motors. To avoid any stress, I typically used 3ph suppression filter chokes in the motor phases.
The oldest was on a 1958 CNC 25' bed mill rail planer retrofit, machine was circa 1958
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.