Custom (very) Quark esc heatsink...

[Serum]

perhaps it's not clear to you what this rise delay means;

The speed of a FET/Transistor isn't endless fast. Nor is it's steering signal. (not to mention the polution of the steering signal), this steering signal is obviously is needed to put a fett into full conduction. It simple takes time before the near 0 ohm (full conduction) status is reached. In this time, the FET isn't on it's ideal internal resistance, but the load (motor) stays the same. the fet is at highest efficiency at full conduction. During this 'travel' to full conduction it produces heat (since the internal reistance is getting smaller and smaller reaching full conduction). The speed in which a signal is able to rise, is explained in volts per micro seccond (slew-rate) This rising is done with a steering signal, this steering signal can not be perfect. once the rice took place on a short amount of time, there always is something as a sinus on top of the block-wave, (it's quite impossible to make perfect block-wave) you need the feedback from the signal to correct the errors in the blockwave. (this is the steering signal) not to mention the far from ideal load of a motor (induction) since a controller works on PWM, it's all about different lengths of 'blockwaves'

Now, decide for yourself; if a transistor was digital, would there be a lost? (digital is 0 and 1, and NOTHING in between, since a FET basicly is analog, you have got losses in switching it ON/OFF (1/0)

Hope this explains.

[zeropointbug]

MAybe 'digital' is a tittle much, but it can't really be called analog either though. Everything in this world takes time, that includes transistor switching, so, that does not necessarily make it analog because of this.
You know what I mean?

[Serum]

that's not the point right now; do YOU know what I mean?

[zeropointbug]

ya i know what you mean. That aspect of the FET is somewhat out of our control is it not?


Just thought of this.... how about a Quantum FET?! :005:

A FET utilizing Quantum Mechanical effects such as entanglement (non-locality), superposition! Who knows maybe we will have the perfect FET someday soon, zero switch on time, room-temp super-conducting... :017:

[GriffinRU]

Originally Posted by Serum

that's not the point right now; do YOU know what I mean?

Rene, you are the man!

Zeropointbug, this little bit cost efficiency. And if you spent some time reading about FET's and how it works, then maybe you change your view point on digital and analog. Otherwise it is pointless even talking about any efficiency problems inside ESC...

[zeropointbug]

Originally Posted by GriffinRU

Rene, you are the man!

Hey! Cut that out!

[zeropointbug]

Originally Posted by GriffinRU

Zeropointbug, this little bit cost efficiency. And if you spent some time reading about FET's and how it works, then maybe you change your view point on digital and analog. Otherwise it is pointless even talking about any efficiency problems inside ESC...

How is it pointless talking about efficiency of an esc? lol

So efficiency doesn't matter to you?

[Serum]

That's not Artur's point zero.

you still see a fet as a digital device, read my post #91, and simple read it entirely. What Artur means is that if you don't change your point of view on digital/analog, he sees no point in discussing the efficiency of a controller with you.

IF you keep seeing a fet/transistor as a digital device (OFF/ON) there is no such thing as losses due to the the constant changing of 0 to 1 to 0 to 1..

just read post #91, it should explain.

[zeropointbug]

Why do you think I THINK that?!

What do I have to do to make it clear to you that I am AWARE of switching/slew rates....

Just because it takes time to switch on, does not make it analog! That's just an illusion.

[Serum]

useless..

[zeropointbug]

clean up these last posts, this was a heatsink thread. I am not finished on it yet, until I get my parts, it's on hold. don't say that...

[Serum]

there is no reason for deleting these posts, there is valuable information in some of them.

[zeropointbug]

w/e, leave them if you want. It's not very clear information.

[zeropointbug]

Well i got the Arctic Silver adhesive in today, and went to my machinist, but he doesn't stock copper... bummer. So i am using aluminum instead, should work great still, might run a few degrees warmer though.

I'll post some more pics when I get the piece cut, and pasted on.

[zeropointbug]

Here is the results. Let me tell you, it was a tight fit! I should have lapped down the thickness of the alum. pad a little bit, the case ends were tight fit to go it, and the programming button was tight into the button pad (you might be able to see it in the pic. But i did a quick test running it on the table, the Quark gets a little very quickly unlike before where it took a while.... then I popped it onto the big heatsink and instantly was chilled back down to room temp.

I have a feeling this setup will work beautifully! ;)

Stay tuned, I am going to tap the copper heatspreader on the heatsink and use 3mm screws with the CF plate to secure the Quark down with pressure.