Re: how does an electrical motor work?

In alt.home.repair on 27 Jul 2005 23:43:34 -0700
philip5malin@xxxxxxxxxxx posted:

>My pestal fan is not working. So I decided to junk it and meanwhile
>also take it apart to investigate. I am puzzled by the electrical
>wirings so I am asking this question. The elecetrical motor has
>bushings on 2 sides with 2 wires black and white. This part I

You must mean brushes.

>understand that the wires brings in electricity and rotate the middle
>magnet to spin around the outside megnetic coil which is energized by
>2 wires +/- AC. The Power cord comes with a white wire that go into
>the housing, another lead go into a samll box. This box is outside of
>the cyclindrical housing, it is a small 3cmx3cmx1cm box with 3 small
>wires black, red, purple ,(box which I can adjust speed). Then another
>box 1cmx1cmx1cm with 2 wires blue and grey that look like a resistor.
>So there are total 5 wires that go into the motor housing: black,red,
>purple, white, gray, blue. I think it only need 2 wires to make a
>motor spin. What do the other wires do? If I use a voltmeter to test
>each wire, what should I get if it is normal?

You might be using voltmeter the way that I do, to include everything,
but if you mean an actual voltmeter, it does nothing unless the motor
is plugged in. Don't plug it in. Use an ohmmeter. Open the boxes.
Get a book at the library.

Meirman
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