home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.energy:6322 sci.electronics:21287
- Path: sparky!uunet!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge
- From: kludge@grissom.larc.nasa.gov (Scott Dorsey)
- Newsgroups: sci.energy,sci.electronics
- Subject: Re: Flywheel batteries as EV power source
- Date: 21 Dec 1992 16:11:32 GMT
- Organization: NASA Langley Research Center and Reptile Farm
- Lines: 21
- Message-ID: <1h4qbkINNnbi@rave.larc.nasa.gov>
- References: <BzJHE7.B8@xrtll.uucp>> <gfBCW0a00YUn84A25_@andrew.cmu.edu> <78150@ncratl.AtlantaGA.NCR.COM>
- NNTP-Posting-Host: grissom.larc.nasa.gov
-
- In article <78150@ncratl.AtlantaGA.NCR.COM> mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson) writes:
- >In <gfBCW0a00YUn84A25_@andrew.cmu.edu> geek+@CMU.EDU (Brian E. Gallew) writes:
- >
- >|OK. Here is one *I* would like to see. How about flywheel application
- >|in uninterruptable power supplies? The energy density should be a lot
- >|higher, *and* they should be a lot lower maintenance. I think someone
- >|mentioned drawing power directly from the flywheel (basically using it
- >|as a generator). could this concept be broadened where you have both
- >|a power-in and a power-out path going at the same time? Wouldn't this
- >|also tend to stop power surges and so forth? Am I simply stupid?
- >
- >Sounds like an interesting idea to me. Make one end of the flywheel a motor
- >driven by line current. Make the other end a generator that powers your
- >computer, or whatever. Output is electrically isolated from the input, and
- >the mass of the flywheel will even out the surges and dropouts.
-
- This used to be fairly common in big mainframe installations. I worked at
- a Cyber site that had a flywheel about ten feet in diameter attached to
- the main motor-generator set. When the power went out, we had about twenty
- seconds of operation to save registers and copy all jobs out to disk.
- --scott
-