Team Tekin R1 Pro brushless speed controller

[captain harlock]

I've been monitoring this controller for quite sometime and all the things I've heard about it was very good actually.

It's about 1" wide and 1.3" long with no heatsink and it can handle up to 14cells and 5s lipos without voiding the warranty.

Still, though, there's no heatsink and I don't know why they make it accept 5s lipos while it is purely meant for 1/10th scale rigs.

It's also much priceier than the Mamba Max controllers. The first worth $224 and the latter is worth less than $136. I heared, though, that it's much smoother than the Mamba Max.

If it can handle high voltages with no heatsink and external bec as well as being smoother than the Mamba Max, I guess I might go for one.

Someone must confirm the gossips, first.

[Sylvester]

I havent heard of this controller that much, but 5s without a heatsink? How do they do that?

I dont know how much smoother it can be from the MM, also the 1/10 thing is odd ; 5s lipo in say a T4?! Crazy if you ask me.

[coolhandcountry]

The no heat sink would have me worried.

[squeeforever]

I dunno, but I would give it a shot...Tekin has a good rep, so I wouldn't hesitate to buy one, but I have other controllers I would rather...

[gixxer]

I am interested in them too. The one thing I do think is odd is the 5s part because they only listed up to a 12.5volt cut off (last specs I saw) and that is only good for up to 4s. The size looks good and I liked my tekin brushless for my mini but, right now I will wait for someone else to test it first before I spend another $200 on an esc.

[captain harlock]

I want to use a brushless controller with a 1920/4 in my touring car along with a TrakPower lipo pack.

I thought that a compact esc is the best I could use and the cars chassis is quite narrow. The R1 is small, but not as small as the Nosram and Quantum brushed controllers.

[Procharged5.0]

Originally Posted by coolhandcountry

The no heat sink would have me worried.

That caught my attention right away.

[captain harlock]

Probably they'll make some updating to the thing. It's not yet widely spread in all the hobby shops. In fact, I did not see it instock, yet. This must tell something. Tekin has been working on this thing for over two years now.

[Mike.L]

no heat sinks, dunno doent sound to safe to try 5s with then... but if it claimes it can...then it should.

[BrianG]

It's not so much the high voltage or the current that causes the heat on the ESC, it's the time that there is a voltage drop on the FETs when current passes though it that causes the heat. And this happens mostly during the very short time it takes for the FET to switch on and off.

If the FET had VERY fast switching times, very low "on" resistance, with almost no rise time delay, and enough of them were in parallel (to further reduce the "on" resistance), it is possible I suppose to run an ESC without a heatsink.

For comparison: The MM specifies an "on" resistance of 0.0003 ohms. That's 0.03v dropped on it at 100A, which is 3W dissipation. Since that is kinda low to produce the heat we see on these ESCs especially since we never draw 100A continuously, I would say that the FETs have some type of slope when they switch on and off, which would account for the extra heat.

The R1 pro specifies the on resistance of 0.00005 ohms. That's 0.005v dropped on the ESC at 100A, which is 0.5 watts!

Based on the fact that the "on" resistance is 6 times lower than the MM alone, it should maybe run a little warm without the heatsink.

I have faith in Tekin. I love there mini rage esc; I have pushed that little 25a esc on 4s with internal bec for about an hour with a 6800 motor. Temps at the end of the run were around 150f on the esc with no heatsink....

Bye:018:

[jhautz]

But on an esc with a heat sink, you at least know you can add a fan blowing on the esc if there are heat problems. If its in a closed plastic case, you cant even blow a fan on it to keep it cooler.

I talked to these guys at the iHobby show. They have a cool feature on these ESCs. There is a built in temp monitor like most ESCs, but this one has a led that blinks to tell you how hot the esc is. If its blinking faster its hotter. Now if there wasnt going to be heat issues, why would they bother with that.

Its still a cool feature...


EDIT: another thing I jsut noticed. The specs say its 5s capable, but the highest LVC setting is 12.5V. Why wouldnt they have a 15V cutoff if its 5s capable?

[Procharged5.0]

It is a cool feature.

I wonder if they goofed on the spec sheet? I would think 4s max.

[BrianG]

Originally Posted by jhautz

...EDIT: another thing I jsut noticed. The specs say its 5s capable, but the highest LVC setting is 12.5V. Why wouldnt they have a 15V cutoff if its 5s capable?

Maybe they rated their voltage capacity using the same method that Quark used to rate the 125B as 6s? :005:

[captain harlock]

Yeah, you're probably right.