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Inrunner motor in outrunner ESC of the same amps = bad idea?

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Inrunner motor in outrunner ESC of the same amps = bad idea?

Old 03-04-2008, 01:19 PM
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Eizhan
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Default Inrunner motor in outrunner ESC of the same amps = bad idea?

Hey guys. I'll keep it simple, can [link=http://www.rcsmart.com.my/webshaper/store/viewProd.asp?pkProductItem=585]this[/link] work with [link=http://www.rcsmart.com.my/webshaper/store/viewProd.asp?pkProductItem=166]this[/link]? They have the same amps. So, I'm guessing
It'll work? Correct me if I'm wrong.

Thanks in advance,
Eizhan.
Old 03-04-2008, 01:22 PM
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opjose
 
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Yes no problem.

You can always use an ESC of higher capacity than the motor.

You usually do not want to do the opposite though.

Old 03-04-2008, 01:36 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Awesome. Thanks for the quick reply. . You think It'll be a bit thermal though?
Old 03-04-2008, 01:41 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

A larger ESC will actually tend to say COOLER because it has a bigger heat sink.

Always set things up so that you have airflow over the battery, motor and ESC.

Old 03-04-2008, 01:43 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Hm, mine doesn't have a heat sink. It's those normal ones wrapped in plastic. D:
Old 03-04-2008, 01:49 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

There is a heat sink under the plastic.

On one side of the ESC you will notice that there is a rectangular metal area. This is the heat sink.

It really should NOT be covered in plastic.

Usually when I encounter this I will cut a smaller square hole in the plastic to expose the heat sink.

Then I use computer memory heat sinks, cut to size to further improve heat dissipation from that area.

If you do something like this, it is important NOT to remove too much of the plastic, which may cause it all to come off with heat.

A square in the center approximately 30% of the existing metal heat sink's size will suffice.

Old 03-04-2008, 01:54 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Oooh, yeah I see it. Computer memory heat sinks? Eh? The hard drive? Or the RAM? Hm, I might try putting some cooling paste on it.
Old 03-04-2008, 02:04 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Something like this
http://www.radioshack.com/product/in...entPage=search
or this
http://www.radioshack.com/product/in...entPage=search
Old 03-04-2008, 02:05 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

OOOH, awesome! I'm gonna put like a dozen of 'em on it. Haha. What about if I glue a small fan on it?
Old 03-04-2008, 02:10 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Be carefull when replacing a heat sink.
There is a specific area of the ESC that needs the heat sink sitting flat against it and some ESCs have adjacent areas that sit higher, so you have to trim to fit.
There was instructions I saw somewhere, I think it was one of the helicopter forums if I rememeber right.
Old 03-04-2008, 02:11 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?


You must be psychic!



---

You do not have to "replace" the existing heat sink... and since this may be both problematic and dangerous, I'd advise against it.

Rather what you can do is to open just enough of the covering to expose an area of the existing heat sink, then stick the memory heat sink onto that.

I've done this many times with good results.

The computer memory heat sinks come with a special adhesive on them.

IMHO unless you are into the very high power ranges, a seperate fan is not required... instead you want to assure good airflow through the fuse.... as you don't want the battery or motor to get too hot too.

Old 03-04-2008, 02:14 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Yeah, that's what I meant. Stick a dozen of them on the existing heat sink. Oh, I see. I never realised that..
Old 03-04-2008, 02:22 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Just one of these is plenty.

Old 03-04-2008, 02:24 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

Really? What are their dimensions anyway?
Old 03-04-2008, 03:12 PM
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Default RE: Inrunner motor in outrunner ESC of the same amps = bad idea?

About .5 to .7" square on the side with the adhesive.

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