DPS phase shifter and VFD

[tokamak]

I have 240V single phase input source and a 240V 3 phase VFD.  I want to know if the DPS phase shifter will work to convert the single phase power input from the wall to 3 phase power input for the VFD (which will then be used to control the 3 phase motor)?

[ThomasPowers]

What does the manufacturer say?

[Latticino]

Some VFD will also accomplish the phase shift.  I know the two I have plug directly into 240V single phase and have outputs to 3 phase electric motors.  You should have a wiring diagram that details this.

[Mike BR]

The VFDs I've looked at (not that many, I admit), take the input power directly through a diode bridge to rectify it into DC.  If you connect use single phase input power rather than three-phase, four of the six diodes will have to do all of the work, and the rectified output will be "lumpier" than rectified three-phase.  But it might work even if the VFD isn't rated for single-phase input, particularly if you don't run it at full load.  Of course, you also might damage the VFD (but three-phase power can drop a leg and "single phase" so hopefully the VFD either can take it, or has a circuit to shut itself down on single phase input.)

[Purple Bullet]

I tried a DPS on a donated surface grinder. Smoked it. The problem (I think) was that it was trying to run a three phase motor AND being transformed back to single phase for the oiling system and the magnetic chuck. Solution? I got a VFD for the grinder motor and ran separate circuits for the single phase stuff.