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- Newsgroups: sci.electronics
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- From: hinz@bonfire (David Hinz (hinz@picard.med.ge.com))
- Subject: Re: DC to AC on large scale???
- Message-ID: <1993Jan26.111338.18452@mr.med.ge.com>
- Sender: news@mr.med.ge.com
- Nntp-Posting-Host: bonfire
- Organization: GE Medical Systems, Magnetic Resonance
- X-Newsreader: TIN [version 1.1 PL8]
- References: <1jp8uvINNb7s@coral.bucknell.edu>
- Date: Tue, 26 Jan 93 11:13:38 GMT
- Lines: 34
-
- philip rose `94 (rose@bucknell.edu) wrote:
- : In article <1993Jan22.134237.13381@waikato.ac.nz>, phys2108@waikato.ac.nz writes:
-
- : |> One way I believe they can do it is by using the dc to power a motor, which
- : |> then drives an ac generator.
- : |> Geoff.
-
- : NOOOOO WAAAAAY!!!
-
- : This is done with power electronics, no motors or generators are involved.
-
- So, what you're saying is this:
-
- "I've never heard of it, therefore it doesn't exist!"
-
- Motor/Generators (MG's) have been around for many MANY decades. We didn't
- always have nice silicon controls to work with...
-
- Commonly, you will have both the motor and generator (or alternator, whichever)
- on the same shaft, so they are directly mechanically coupled.
- If you put a big flywheel on the shaft between them, then you have a basic
- UPS system...the mass of the flywheel will mostly compensate for the lost
- power, to a point.
-
- There is obviously an efficiency loss due to heat, and they take up a bit of
- space, but they certainly do exist.
-
- NOOOOOOOOOOOO WAAAAAAAAAAAAAAY indeed! Sheesh.
-
- --
-
- Dave Hinz - Opinions expressed are mine, not my employer's. Obviously.
- Ask me if I have an opinion on this! \ Don't blame me; I voted for Perot!
- SAAB - Because you get what you pay for. \ Pherrets are Phun!!!
-