Re: VFD single phase input three phase output
Originally Posted by
ZeroBacklash
Currently my motor would be not more than 1.5KW. For voltage I don't know what terminology VFD's use but I was referring to 400V measured line to line in a 3 phase system. Phase to Neutral would still be aronud 220V.
So If I opt for a 3 phase input and 3 phase output VFD, would I still need to derate it? I mean If my motor rating is 1.5KW should I go in for a 2.2KW VFD?
Normally there are 2 classes of VFDs, 200V class and 400V class (before I get flamed here, yes I know there are higher voltages available). The 200V class encompasses 200 to 240 Volt, and the 400V class encompasses 380 to 415 volt. This includes both single and 3 phase inputs.
Given that your requirement is 1.5 KW, you have many options. As Goemon stated, there are apparently VFDs that are 200V single phase in, 400V, 3 phase out, so that pretty much solves your problem with voltage conversion.
No derating required if the VFD is rated for single phase input.
Jim Dawson
Sandy, Oregon, USA