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- Path: sparky!uunet!wupost!cs.utexas.edu!swrinde!mips!mips!munnari.oz.au!uniwa!cujo!cc.curtin.edu.au!zrepachol
- From: zrepachol@cc.curtin.edu.au (Paul Repacholi)
- Newsgroups: comp.sys.dec
- Subject: Re: WANTED old PDP-11?
- Message-ID: <1992Aug26.095459.1@cc.curtin.edu.au>
- Date: 26 Aug 92 00:54:59 GMT
- References: <1992Aug13.160144.20927@usenet.ins.cwru.edu> <10957@platypus. <1992Aug24.212459.17668@mnemosyne.cs.du.edu> <1992Aug26.064807.1@cc.curtin.edu.au>
- Sender: news@cujo.curtin.edu.au (News Manager)
- Organization: Curtin University of Technology
- Lines: 19
-
- In article <1992Aug26.064807.1@cc.curtin.edu.au>, zrepachol@cc.curtin.edu.au (Paul Repacholi) writes:
- ...
- >
- > All RP drives are 3 phase, as is the RM05. All others are single I'm reasonably
- > sure. The TU/A 77/78/79 are also 3 phase I suspect...
-
- In reply to someone who mailed...
-
- The CDC 9766 is 3 Phase. In all disks I have seen, the motors are 3 phase, star
- or delta conected, depending on local voltage ect, and the electronics are
- conected from one phase to neutral. Hence, with muitiple drives you want to
- rotate the phases to eliminate the neutral current.
-
- Come to think of it, I do know of one exception, the IBM 3380 (?) has a 3 phase
- spindle motor AND a single phase fan, sorry, Air Movement Device. Guess what
- happens when the phases are reversed? ( By the motor-altenator being serviced
- by your local friendly CE for example )
-
- ~Paul
-