RE: [TCML] VFD motor

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I've successfully run a 1/2 hP single phase motor with a single phase to three phase VFD. I simply turned off phase monitoring on the drive, then adjusted the voltage to get 240 volts phase to phase, and fed the motor two phases. The only problem was that if I turned the speed down too much, the motor centrifugal switch disengaged. This could have been corrected by grinding away some of the centrifugal switch weights, but I upgraded to a 3 phase motor instead.

Adam


--- On Fri, 1/16/09, William Noble <william_b_noble@xxxxxxx> wrote:

> From: William Noble <william_b_noble@xxxxxxx>
> Subject: RE: [TCML] VFD motor
> To: "Tesla list" <tesla@xxxxxxxxxx>
> Date: Friday, January 16, 2009, 10:18 AM
> a VFD drives a three phase motor only, you cannot use
> "any old induction motor".  I am unaware of ANY
> VFD that will do more than synchronize to the 60 hz, and
> those are exceedinly rare - if you want a synchronous motor,
> a VFD is absolutely the wrong way to do it.
>  
> (note, just for the group, that I have a couple of small (1
> hp if I remember right, see my web, wbnoble.com) 440V VFDs
> available at an attractive price if you can use them)
> 
> ----------------------------------------
> > Date: Fri, 16 Jan 2009 09:23:43 -0500
> > From: sdbogard@xxxxxxxxx
> > To: tesla@xxxxxxxxxx
> > CC:
> > Subject: [TCML] VFD motor
> >
> > Quick question guys,
> > Does a motor to be used with a VFD have to be modified
> for
> > synchronous operation or can it be any old induction
> motor. Thanks.
> >
> > Scott Bogard.
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> >
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