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Path: utzoo!attcan!uunet!jarthur!usc!zaphod.mps.ohio-state.edu!wuarchive!emory!rsiatl!jgd
From: jgd@rsiatl.UUCP (John G. DeArmond)
Newsgroups: sci.engr,sci.electronics
Subject: Re: use of inverters with modified sine wave output with computers, etc
Keywords: inverter, modified sine wave
Message-ID: <4679@rsiatl.UUCP>
Date: 5 Nov 90 22:38:34 GMT
References: <29237@boulder.Colorado.EDU>
Followup-To: sci.engr
Organization: Radiation Systems, Inc. (a thinktank, motorcycle, car and gun works facility)
Lines: 25

gordon@boulder.Colorado.EDU (GORDON ALLEN R) writes:

>Does anyone know of any long term effects of using such an inverter, rather
>one which produces a real sine wave, such as might be obtained with a synchro-
>nous one, on these kind of electronics?  How sensitive are computers etc to
>pulse input rather than sine wave?  Would power line conditioners be required?

See my previous posting on the subject for details.  I have a homemade 1 kw 
square wave UPS that runs this system and its peripherals.  I've also 
experimented with running other devices one might find around the house.
The only thing I've found that absolutely refused to run on square wave
power is my microwave oven.  The unit would fire up and run but it would
not heat.  The reason is that the magnetron depends on the peak value of
the line voltage for its drive.  This could be easily rectified with 
an inverter adjusted to a higher average voltage.  I think the concept
of an inverter for each load center is an extremely viable option.
No line conditioning is needed.

John

-- 
John De Armond, WD4OQC  | "The truly ignorant in our society are those people 
Radiation Systems, Inc. | who would throw away the parts of the Constitution 
Atlanta, Ga             | they find inconvenient."  -me   Defend the 2nd
{emory,uunet}!rsiatl!jgd| with the same fervor as you do the 1st.