Re: (ET) rotary inverter specifics

[jeremy gagliardi com]

Couldn't one use a line conditioner off the rotary inverter to correct for 
voltage variances?

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 mailto:Jeremy Gagliardi com
 http://Jeremy.Gagliardi.com
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----- Original Message -----
From: "The Nauglers" <snaugler earthlink net>
Date: Sun, 3 Oct 2004 14:20:51 -0400
To: "elec-trak" <elec-trak cosmos phy tufts edu>
Subject: Re: (ET) rotary inverter specifics

> Thon,
> 
> The rotary inverter will have a sine wave output.  The only reason an
> induction motor may not like the rotary inverter would be how good the
> voltage regulation was.  This includes both continuous voltage output
> stability and the capability to handle inrush, or starting, currents and 
> the
> voltage drop that occurs when that inrush to your load happens.
> 
> It is possible that a rotary inverter may not handle the starting 
> current of
> your induction motor.  If the inrush capability is too low the output
> voltage will drop, and sometimes the inverter will slow down and the
> frequency will also drop.  In either case that is bad for both the 
> inverter
> and the motor you are trying to run, and frequently you can't even get 
> the
> motor to start.
> 
> While more often a flaw in the ratings of electronic inverters, you need 
> to
> make sure that your rotary inverter has the following two specifications:
> 1.  A continuous current output that meets or exceeds the continuous 
> draw of
> your inductive (motor) load.
> 2.  A surge, inrush, starting, or peak current rating that is at least 
> three
> to five times the running current of your inductive load.  It only has to
> maintain this higher current for two to five seconds, as long as it takes
> the inductive load to reach normal operating conditions.
> 
> This rating applies to generators too.  I had a friend whose well pump 
> would
> not start when run off a Coleman 4000 watt generator.  That same well 
> would
> start and run off a Honda 3500 watt generator.  The lower watt rated 
> Honda
> had a higher ability to handle the well's inrush starting current.
> 
> There are some military rotary inverters out there with a 400 Hz output, 
> so
> beware of them.  A load designed for 60 Hz operation will not run off of
> them, but many unversal motors will.
> 
> Steve Naugler
> snaugler earthlink net
> 
> ----- Original Message ----- 
> 
> 
> > Could someone explain why a 2250W rotary inverter would not "operate
> > induction type motors found in fans, furnace blowers, washers, 
> > dryers,etc
> ".
> >
> > Thanks.
> > Thon
> 
> 
> 
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