I quick rule of thumb is to double the VFD size when connecting to single phase. So a 10hp VFD will work fine for your 5hp application. The first stage of a VFD is Rectification (AC-->DC conversion). After that it chops the DC up into the selected frequency. Most manufacturers will still warranty a VFD wired this way but, that varies from company to company. All in all VFD are my first choice.
Good luck
Brian |