Alex w Posted November 25, 2019 Share Posted November 25, 2019 I’m building a belt grinder but I am deciding to use a 1phase motor with a vfd but someone has said to me that you need a 3phase motor to use a vfd but when I looked on eBay it said I can wire it to for a 1phase input and output. This is probably a stupid question but is it possible to run a vfd with a one phase motor if wired correctly. I want to use a 1phase motor because I am using household electrics. Quote Link to comment Share on other sites More sharing options...
Latticino Posted November 25, 2019 Share Posted November 25, 2019 As far as I know, you use a single:three phase converter VFD to run a 3 phase motor off your single phase house current. Personally I'm in favor of using dual pole/single phase, if possible, but I"m not sure if you have that over there. I believe there is a reduction in torque available at the shaft, but may be wrong on that. I'm sure someone with better info will be along to elaborate further. Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 25, 2019 Share Posted November 25, 2019 There are single-phase VFDs out there, but there's some reason they're not good in this application (I can't remember what it is, but I'll see if I can track it down). Update: found it. Quote Link to comment Share on other sites More sharing options...
Nhvalentine Posted December 1, 2019 Share Posted December 1, 2019 So you can for certain run a multi phase motor on regular house electricity. I run a 3 phase 1.5 hp dayton motor on a kbac 27 VFD. It just plugs into a regular outlet. Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted December 1, 2019 Share Posted December 1, 2019 Technically you are not running a 3ph motor from single phase power, you are running a converter with the single phase, which in turn operates the motor. This is not 100% efficient either, there are conversion losses to account for Quote Link to comment Share on other sites More sharing options...
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