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- Newsgroups: sci.electronics
- Path: sparky!uunet!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!ucla-cs!ucla-mic!MVS.OAC.UCLA.EDU!CSMSMAS
- From: CSMSMAS@MVS.OAC.UCLA.EDU (michael)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <19921219234123CSMSMAS@MVS.OAC.UCLA.EDU>
- Reply-To: csmsmas@mvs.oac.ucla.edu
- Sender: MVS NNTP News Reader <NNMVS@MVS.OAC.UCLA.EDU>
- Nntp-Posting-Host: mvs.oac.ucla.edu
- References: <1992Dec19.065254.8562@athena.mit.edu>
- Date: 19 Dec 92 23:41:42 PST
- Lines: 20
-
- >A major disadvantage that I see with the flywheel scheme is the amount
- >of time it would take to "charge" it up from zero energy. If the
- >flyweel can provide a large amount of output power for a long time,
- >then it should take at least the same time to charge it back. A
- >scheme where flywheel systems are interchanged at "fuel" stops could
- >alleviate this issue.
-
- I would think that a flywheel could be charged a *lot* faster
- than a battery. The major limit would be the power source and
- path into the flywheel -- not the wheel itself.
-
- I once heard a large motor-generator started with a broken .
- starter -- no slow start. In the few seconds (10?) it was
- powered on it went from just turning over to what sounded like
- full speed. It sounded like a jet engine being wound up in the
- building! (This was without any load on the MG).
-
- This ran on 3 phase 480 VAC power and I'd guess it was at least
- 50 KVA. It output 400 hz power and could put out enough power to
- run both an IBM 360/91 CPU and a 3033 CPU at the same time.
-