I have Chinese 1.5kw vfd and a spindle. It runs and sounds ok. But when i check the current on the vfd it shows me the following.

@ 100Hz - 6A
@ 200Hz - 4A
@ 300Hz - 3.2A
@ 400Hz - 2.8A

above readings are with no load. Why does the current drop with high spinning speed?, its just V=IR? or vfd doesnt have enough power since its running on 220v single phase input? Can this thing really run at 1.5Kw?

Can someone please explain this?

Regards