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- Newsgroups: sci.electronics
- Path: 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
-
- 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.
-
-