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M1BYT > TECH 07.09.05 23:12l 37 Lines 1625 Bytes #999 (0) @ WW
BID : 293690M1BYT
Read: DG9VH GUEST DL1LCA OE7FMI
Subj: Re: Power inverter waveform
Path: DB0FHN<DB0RGB<DB0MRW<OK0PPL<DB0RES<ON0AR<GB7FCR
Sent: 050907/2004Z @:GB7FCR.#16.GBR.EU #:488 [Blackpool] FBB-7.03a $:293690M1BY
From: M1BYT@GB7FCR.#16.GBR.EU
To : TECH@WW
G4BBH Opined with considerable skill:-
> I have a 300W 12V to 230V power inverter which has what is described as
> a 'modified sine' wave output. Is this synonymous with 'square wave'?
> If it is really square wave what can I do do protect switch mode power
> supplies as loads. Will a large pi-network filter help? Any ideas
> what 'modified sine' actually means and what I can do to improve it.
Hi Dick,
It means the output will be something between the two, probably with lots of
harmonics from the switching.
The least satisfactory type of load to drive from such an invertor would be a
standard transformer, as used in a typical linear type PSU. Much less likely
to suffer problemsw will be a switch mode power supply, because these rectify
the and smooth the mains first, then feed the DC output into another invertor.
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º 73 from Harry, M1BYT @ GB7FCR.#16.GBR.EU º
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º International Museums Weekend 18th+19th June 2005 º
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º QTH: Garforth, W. Yorks.. º Timed 19:56 º
º harry.m1byt@tiscali.co.uk º 07 Sep 05 º
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