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- Xref: sparky rec.autos.tech:14035 rec.autos.vw:5705
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!elroy.jpl.nasa.gov!nntp-server.caltech.edu!hacker
- From: hacker@cco.caltech.edu (Jonathan Bruce Hacker)
- Newsgroups: rec.autos.tech,rec.autos.vw
- Subject: Re: over charging battery
- Date: 14 Oct 1992 22:46:46 GMT
- Organization: California Institute of Technology, Pasadena
- Lines: 32
- Message-ID: <1bi80nINNjq0@gap.caltech.edu>
- References: <1992Oct12.062637.14627@nmr-z.mgh.harvard.edu> <1992Oct14.034258.15175@dartvax.dartmouth.edu>
- NNTP-Posting-Host: punisher.caltech.edu
-
- Brian.E.Hannon@dartmouth.edu (Brian E. Hannon) writes:
-
- >In article <1992Oct12.062637.14627@nmr-z.mgh.harvard.edu>
- >shinh@nmr-z.mgh.harvard.edu (Shinjiro Hirose) writes:
-
- >> So, does anyone know
- >> if my voltage regulator can be stuck in the "on" position?
- >> The one time I've dealt with voltage regulators, they didn't
- >> let enough charge through. Can they fail in the opposite manner?
-
- >Well, it is not really an on/off thing. A voltage regulator simply
- >dissipates power stemming from voltage over a specified limit. It
- >limits the voltage all the time exactly the same, and the battery
- >charges up to this voltage, unless the regulator has failed.
-
- A voltage regulator regulates the alternator voltage by controlling
- the alternator field current. It is a feedback control system and
- dissipates nothing. Old mechanical regulators actually were on/off
- devices and varied the output voltage by changing the duty cycle of
- the on/off pulses of field current created by mechanical contact
- points. Newer electronic regulators control the field current
- linearly by using a power transistor.
-
-
-
-
-
-
- --
- Jon Hacker
- Caltech, Pasadena CA
- hacker@tumbler-ridge.caltech.edu
-