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Article #17059Re: Power Inverter Problems (12VDC to 117VAC switcher)
From: christopher m. wolf
Date: Tue, 12 Jan 1993 22:54
Date: Tue, 12 Jan 1993 22:54
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keithl@klic.rain.com (Keith Lofstrom) writes:
>Many power inverters are square wave output, and designed to drive loads
>like computers that have diode bridges followed by capacitors. Square
>waves of uncertain frequency are peachy keen for this application.
>Note that a square wave that is 170V peak is going to produce twice as
>much RMS power than a sine wave that is 170V peak; hence the loading
>problem with a light bulb. You will probably get 200 watts out of a
>100 watt bulb - for a while.
Don't they usually use a square wave such as:
____ ____
| | | |
--- --- --- --- ---
| | | |
---- ----
with delays between the pulses. This can be arranged to give an RMS
that is equivilent to the wall socket.
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!caen!mtu.edu!cmwolf From: cmwolf@mtu.edu (christopher m. wolf) Subject: Re: Power Inverter Problems (12VDC to 117VAC switcher) Message-ID: <1993Jan12.225420.19844@mtu.edu> Organization: Michigan Technological University References: <1993Jan12.052928.25767@klic.rain.com> Date: Tue, 12 Jan 1993 22:54:20 GMT Lines: 20