[modeleng] Re: Vari-speed motors
- From: "shep" <shep.28@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 14 Sep 2005 17:36:54 +0100
Hi Patrick
Thank you very much for this helpful message. I will pursue the matter
further.
Cheers!
Hubert
----- Original Message -----
From: "Marian Lynch" <sb286643@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, September 14, 2005 4:17 PM
Subject: [modeleng] Re: Vari-speed motors
> Hi,
> The solution is simple:
> Every AC motor (even triphase)can be made to vary its RPM, with some
> electronics.
> If you take a motor (AC) that has carbon brushes (like a power dril, a
> hoover etc)
> you can make a simple electronic PC board, that varies the RPM.
> If you are an electronic novice, "Veleman kit sel a kit, wich is simple
> to make an can take
> motors up to 1500 watts, I think it cost no more than 25 GBP
>
> Patrick
> Flanders
>>>Hi all!
>>>Sorry to rabbit on and on about my construction of
>>>this little lathe.
>>>
>>>Now that various kind and clever friends have given
>>>me a variety of ideas regarding the boring of the
>>>headstock of this little lathe, I am able to proceed
>>>with detailed design. I notice that a variety of
>>>small lathes and milling machines are now offered
>>>with vari-speed motors. If I could use one of
>>>these, it would simplify the headstock design, as I
>>>could then have just one pulley instead of a cone of
>>>pulleys. This single pulley could perhaps be
>>>designed for use with a tooth belt.
>>>
>>>I am totally ignorant in the world of these
>>>vari-speed fractional hp motors (mine would be quite
>>>small - say 1/10 hp). In the old days, you had to
>>>use a DC motor, or a three-phase motor to be able to
>>>vary the speed. But I believe that in the brave
>>>new world of electronics, an ordinary AC motor can
>>>be adapted to vari-speed without losing torque at
>>>the lower speeds.
>>>
>>>Any ideas? Thank you in advance!
>>>
>>>Cheers! Hubert
>>>
>>>
>>>MODEL ENGINEERING DISCUSSION LIST.
>>>
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>>>
>>>
>>>
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