I would bet that the odd current behavior is actually due to odd torque behavior in the load.

It is not uncommon, especially in screw conveyors for torque to vary all over at different speeds and with different consistencies of products going thru the conveyor. If everything in the above paragraph is in order, that pretty much leaves motor shaft torque as the cause of current variations. (May I suggest something other than TB Woods) If it isn't and the parameters are set up properly, dump the drive and buy a new one. I would double check that the drive is actually regulating the V/Hz ratio properly as everything else is dependent upon that. And we've got a TB Woods V/Hz drive (ugh!-sorry, not fond of these at all!).Īssuming the drive is programmed for constant Volts per Hz from 60Hz down to near zero Hz, then we should see around 2 amps over the whole speed range 0-60Hz at no load and 7.8amps over the same load range at full rated load.

We've got a two hp motor nameplated 7.8amps at full load.

10 hp 3 phase motor amps