Re: Bicycle Hub Dynamo Subcircuit

Bill Sloman

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Jan 12, 2012, 5:46:28 AM1/12/12

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On Jan 12, 2:52 am, "Martin Riddle" <martin_...@verizon.net> wrote:
> "Jim Thompson" <To-Email-Use-The-Envelope-I...@On-My-Web-Site.com> wrote
> in messagenews:ph9sg7pj2a11enlbm...@4ax.com...
>
>
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>
>
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> > On Wed, 11 Jan 2012 15:47:33 -0800, Joerg <inva...@invalid.invalid>
> > wrote:
>
> >>Jim Thompson wrote:
> >>> Here's my Bicycle Hub Dynamo Subcircuit, based on papers provide by
> >>> Marcel:
>
> >>> ****************************************************************************
> >>> ************ Hub Dynamo Subcircuit by Jim Thompson 2011_01_11
> >>> **************
> >>> *** KUQRMS = Voltage Coefficient RMS at 1 KM/H
> >>> *** RPS1KMPH = Revolutions per second at 1 KM/H
> >>> *** LI = Internal Inductance
> >>> *** RFE = Iron Loss Equivalent Resistance
> >>> *** RI = Internal Series Resistance
> >>> *** POLES = Number of Dynamo Poles
> >>> *** Node KMPH = Voltage Input at desired KM/H
> >>> .SUBCKT HubDynamo KMPH OUTPUT COM PARAMS: KUQRMS=1 RPS1KMPH=0.139
> >>> LI=107.6mH
> >>> + RFE=76.581 RI=7.3633 POLES=28
> >>> .PARAM RT2=1.414214
> >>> V_V1 KMPH 0 DC 0 AC 0
> >>> +PWL 0 0 50 50
> >>> L_LI VUQ N_1 {LI}
> >>> R_RI N_1 OUTPUT {RI}
> >>> RNOFLOAT1 KMPH 0 1G
> >>> E_E1 VUQ COM VALUE {
> >>> + KUQRMS*V(KMPH,0)*RT2*SIN(pi*V(KMPH,0)*RPS1KMPH*POLES*TIME) }
> >>> R_RFE N_1 COM {RFE}
> >>> .ENDS HubDynamo
> >>> ****************************************************************************
>
> >>> Please try it out and comment/criticize/embellish.
>
> >>Can't comment right now, doing an urgent gigeehoitz design. But ... I
> >>think everyone would just love to see a pic of you on the bicycle ...
> >>pleeeeze :-)
>
> > I presently don't own a bike... I graduated to Z's in 1977 ;-)
>
> > ...Jim Thompson
>
> Wheels are good aerobic activity.
>
> My 83' Schwinn.
> <http://www.flickr.com/photos/64534457@N06/5872579241/in/photostream>

Obviously a fair-weather cyclist - no mudguards. The Lycra brigade go
all out for lightness, and in consequence the Lycra develops a broad
stripe of dirty brown whenever it rains.

And the derailleur looks more Japanese than Italian. My local bike has
Campagnolo gear. The Sydney bike is newer and still has the Shimano
gear that it came with. I may trade up when it wears out (though I'll
probably wear out first).

--
Bill Sloman, Nijmegen

Message has been deleted

Jim Thompson

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Jan 12, 2012, 11:49:10 AM1/12/12

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On Thu, 12 Jan 2012 08:45:42 -0800, Fred Abse
<excret...@invalid.invalid> wrote:

>On Wed, 11 Jan 2012 17:16:57 -0700, Jim Thompson wrote:
>
>> I presently don't own a bike... I graduated to Z's in 1977 ;-)
>

>I find that, the older I get, the more I need my Zs :-)

I'm just the opposite. My body won't let me sleep more than about 5-6
hours.

When I was a student I once slept from the Wednesday evening before
Thanksgiving until the afternoon of the following Sunday ;-)

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
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I love to cook with wine. Sometimes I even put it in the food.

Michael A. Terrell

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Jan 12, 2012, 1:25:20 PM1/12/12

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Jim Thompson wrote:
>
> On Thu, 12 Jan 2012 08:45:42 -0800, Fred Abse
> <excret...@invalid.invalid> wrote:
>
> >On Wed, 11 Jan 2012 17:16:57 -0700, Jim Thompson wrote:
> >
> >> I presently don't own a bike... I graduated to Z's in 1977 ;-)
> >
> >I find that, the older I get, the more I need my Zs :-)
>
> I'm just the opposite. My body won't let me sleep more than about 5-6
> hours.
>
> When I was a student I once slept from the Wednesday evening before
> Thanksgiving until the afternoon of the following Sunday ;-)

Too much Tryptophan and wine!

--
You can't have a sense of humor, if you have no sense.

Jim Thompson

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Jan 12, 2012, 3:01:42 PM1/12/12

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In those days I was into Old Kentucky Tavern. The only wine I could
get was at Giovanni's Italian Restaurant in Central Square... who
defied the law and served to students :-)

Michael A. Terrell

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Jan 18, 2012, 11:28:07 PM1/18/12

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Jim Thompson wrote:
>
> On Thu, 12 Jan 2012 13:25:20 -0500, "Michael A. Terrell"
> <mike.t...@earthlink.net> wrote:
>
> >
> >Jim Thompson wrote:
> >>
> >> On Thu, 12 Jan 2012 08:45:42 -0800, Fred Abse
> >> <excret...@invalid.invalid> wrote:
> >>
> >> >On Wed, 11 Jan 2012 17:16:57 -0700, Jim Thompson wrote:
> >> >
> >> >> I presently don't own a bike... I graduated to Z's in 1977 ;-)
> >> >
> >> >I find that, the older I get, the more I need my Zs :-)
> >>
> >> I'm just the opposite. My body won't let me sleep more than about 5-6
> >> hours.
> >>
> >> When I was a student I once slept from the Wednesday evening before
> >> Thanksgiving until the afternoon of the following Sunday ;-)
> >
> >
> > Too much Tryptophan and wine!
>
> In those days I was into Old Kentucky Tavern. The only wine I could
> get was at Giovanni's Italian Restaurant in Central Square... who
> defied the law and served to students :-)

I was out for five days once, with the Flu. I lost over 20 pounds and
I couldn't even stand up, when I woke up. :(