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- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!sinclairj1.ppath.uiuc.edu!ardie
- From: ardie@UIUC (R.D. McClary)
- Subject: Re: Re: Bachmann motor
- References: <ardie.167.724942465@UIUC> <a5r2x!b@rpi.edu>
- Message-ID: <ardie.168.724957724@UIUC>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: Department of Plant Pathology
- Date: Mon, 21 Dec 1992 17:08:44 GMT
- Lines: 28
-
- >
- >
- > A DC motor >relies on the current travelling in the same direction to
- >maintain a direction of rotation. If AC were applied to it, it would try to
- >oscillate.
-
- Not so! 1. Many of these motors are "universals" that can run on AC or
- DC. There may be a few odd-balls out there that do mess up, but it is not
- always obvious. 2. Direction for a DC system depends on polarity. I
- don't know how electronic reversers for AC work, just how to hook them
- up. (The old AC motors with field windings reversed direction by reversing
- the order in which current flowed through the motor - field first, or
- brushes first.(
-
-
- >Also, the motor detemines the current draw. The motor will not
- >draw 5 amps unless there is something seriously wrong with it.
-
- I know that! The question was, can the motor handle that much current
- before it gets fried. (Actually, the Baldwin is the one tinplate loco with
- a motor that couldn't handle enough load. Although the motor windings might
- survive, the heat often melted the loco body or the brush solder.)
-
- >I think you need to brush up on your electronics a bit before you proceed.
- >
- >-Anthony Prattico
- >
- Agreed, but then, don't we all?
-