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Article #1184Re: WANTED old PDP-11?
From: Paul Repacholi
Date: Wed, 26 Aug 1992 00:54
Date: Wed, 26 Aug 1992 00:54
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1436 bytes
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
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arc1-ca.pugleaf.net!sparky!uunet!wupost!cs.utexas.edu!swrinde!mips!mips!munnari.oz.au!uniwa!cujo!cc.curtin.edu.au!zrepacholReferences:
<1992Aug13.160144.20927@usenet.ins.cwru.edu> <10957@platypus. <1992Aug24.212459.17668@mnemosyne.cs.du.edu> <1992Aug26.064807.1@cc.curtin.edu.au>Show Full Headers
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Path: arc1-ca.pugleaf.net!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