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'Hands on with Heat Pipe'
2008\04\03@030656 by Apptech

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> Hi I would like to hear from someone with actual hands on
> experience with heat pipes.

I'm not likely to be of much help, but can you provide more
details. In what application area?
Electronic cooling, solar heating, other ....?


       Russell

2008\04\03@234547 by Rich

picon face
I have to switch 14 Amps at 220 VAC, 100KHz.  That will generate  a few
calories :-)  I am inclined to believe heat pipe technology may be more
efficacious than a typical AVID heat sink.  If this is not so I would also
appreciate any input as I have not yet actually utilized a heat pipe
configuration.  My exposure is only theoretical.  I usually consider that to
mean "speculative." :-) So I am open to any experienced input.


{Original Message removed}

2008\04\03@235016 by Rich

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Also, Russell.  I will use FETs to avoid large base drive requirements.  I
may choose IGBT, depending on the family of curves. So I can see that
packaging may be a consideration.  Anything you know that will help because
it is a demanding switching application; RFI considerations, PC
considerations etc.

{Original Message removed}

2008\04\04@005950 by Rich

picon face
High Voltage high current power supply; voltage and current regulated ; new
product.  The FETs drive the transformer. The "switching" is perhaps
misleading because I am driving the transformer primary with a decent (
relatively low distortion) sine curve.  Cooling the power semiconductors is
necessary.  The mechanical and packaging considerations are important also
since I cannot make the device any bigger than necessary.  The processor
will run on a separate winding on the transformer, which I will also cool.
The application environment for the product will be an arid high temperature
space.  Liquid cooling is not an option.  I would rather not design in
thermoelectric cooling.  So I thought of heat pipes because The technology
is plausible.


{Original Message removed}

2008\04\04@120407 by Vasile Surducan

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There is only one difference between a heat pipe heatsink and a
standard passive heatsink (combined or not with a fan), the
radiator-ambiant resistance.
So the theory about dimensioning the heatsink is the same for both of them.
Take a look to this one and ask for a complete datasheet, they are
serious and answer to the US orders very quickly, I have order from
them:
http://www.malico.com.tw/index.html

But the subject of this email is wrong. A heatpipe is not a heatsink.

:)


On 4/3/08, Rich <spam_OUTrgrazia1TakeThisOuTspamrochester.rr.com> wrote:
> I have to switch 14 Amps at 220 VAC, 100KHz.  That will generate  a few
> calories :-)  I am inclined to believe heat pipe technology may be more
> efficacious than a typical AVID heat sink.  If this is not so I would also
> appreciate any input as I have not yet actually utilized a heat pipe
> configuration.  My exposure is only theoretical.  I usually consider that to
> mean "speculative." :-) So I am open to any experienced input.
>
>
> {Original Message removed}

2008\04\04@223744 by Rich

picon face
Thank you, Vasile.

----- Original Message -----
From: "Vasile Surducan" <.....piclist9KILLspamspam@spam@gmail.com>
To: "Microcontroller discussion list - Public." <piclistspamKILLspammit.edu>
Sent: Friday, April 04, 2008 12:03 PM
Subject: Re: Hands on with Heat Pipe


{Quote hidden}

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