What current can I push a 6 FET 4110 Lyen with?

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NeilP   10 GW

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What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 16 2012 3:57pm

Just been playing with a scooter

http://www.endless-sphere.com/forums/vi ... 10#p581810

Image

Have a 18 FET controller hanging off it at the moment running at 100 volts, with small 5Ah pack 24s1P

As you can see the controller is physically too big.

Just wondered what other controller to use.

Max current I have seen today with it on the Xlyte 18 FET controller is 45 amps.

Will a 6 FET 4110 controller do at least that?
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by gwhy! » May 16 2012 5:35pm

NeilP wrote:Just been playing with a scooter

http://www.endless-sphere.com/forums/vi ... 10#p581810

Image

Have a 18 FET controller hanging off it at the moment running at 100 volts, with small 5Ah pack 24s1P

As you can see the controller is physically too big.

Just wondered what other controller to use.

Max current I have seen today with it on the Xlyte 18 FET controller is 45 amps.

Will a 6 FET 4110 controller do at least that?
I regularly push 100A through a 6 fet controller running on 50v ( 80A to be on the safe side ) but this is with 3077's I would have thought you could do the same with 4110's :|

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 17 2012 10:24am

Ok, thanks

Well it looks liek the 18 FET controller has died

http://endless-sphere.com/forums/viewto ... =39825&f=2

not sure why though. I opened it up to add the regen brake enable, and found some resistors that had come loose from the board!..but it was still working.

I replaced them, and ti was still working.

The it stopped working... not throttle response, although 5v still present. then I got called out to work, so left it on the bench
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by Farfle » May 17 2012 10:32am

Loaded with 4110s, you can push a well built 6 fet to around 40A cont with good cooling.
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 17 2012 10:41am

Guess I'll have to go with a 12 FET then, at least...or jsut get another 18, but from Leyn this time
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 17 2012 12:54pm

just thinking again.

40 continuous is probably fine. what peaks can it take?...say 5 or 10 second bursts ?
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by ohzee » May 17 2012 1:13pm

For the record I have a 9 FET 4110 no mods and have been pushing 98V 30 Amps with no issues so far.

I know it's just a matter of time so for the most part I run it at 18S rather then 24S.

Also love the scooter looks pretty rad. Need to check your thread for videos.

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 17 2012 1:52pm

Lots of torque there on that scooter. Even at 15 mph or so, if you snatch the throttle open, the front wheel lifts off...scary first time it happens :P
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by FastDemise » May 17 2012 4:28pm

Farfle wrote:Loaded with 4110s, you can push a well built 6 fet to around 40A cont with good cooling.
So that's at 100V being 4kW? What would you consider well built? My 6fet just sees 1.5kW continuous, so clearly I should flood controller with mineral oil and push 5kW thru it. :-)
21" Hardtail, Docs Torque Arm, Lipo 20s2p, ebikes.ca 9C 8x8 and Lyen 6fet (both Mineral Oil cooled)

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by Farfle » May 18 2012 11:59pm

Well built means beefed traces, flip the board upside down and make sure the solder creeps up the fet legs, or better yet, do the buss bar mod zombiess does, and then fill it with mineral oil.
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by 999zip999 » May 19 2012 3:11am

What do you mean flood it with mineral oil ?

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » May 19 2012 4:02am

I imagine he means seal it up, and then fill the entire case with a mineral type non conductive type oil,, the sort used in the big old arc welders, to give better heat transfer to the case from the components inside.
This would in theory give better heat transfer so you could run higher power levels without cooking the components.
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by FastDemise » May 19 2012 4:48am

Exactly! I'm using a small 6fet Lyen controller and it's got gaskets to keep the water out right? Well I would just RTV up the bottom to seal it, fill with oil so the wires exit out the top and off I go. Doesn't change anything except the controllers ability to shed heat quicker. Why should DD motors be the only things oil cooled. :twisted:
21" Hardtail, Docs Torque Arm, Lipo 20s2p, ebikes.ca 9C 8x8 and Lyen 6fet (both Mineral Oil cooled)

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by FastDemise » Jun 05 2012 3:07am

So any New info on how hard a small 6fet can be pushed?

If just using a controller with less fets then is my logic correct in believing heat is the only limitation since there are fewer fets to dissipate the heat?

My controller is now filled with mineral oil and I ran it 12s 40a with 90 phase without trouble. Although my riding has few stops or steep hills so I'm not seeing high draw anyway.

I'm up to 18s and just went to 30a and 75a phase. Will see how that does and ill keep stepping it up 5amps at a time till I find my limit.

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » Jun 05 2012 3:27am

No, not that I can tell you.
Looks like my limiting factor is the motor
It is an I branded motor from a Thompson Euro Tourer granny style e-bike, now laced in a 16 inch rim

Running it at 100v with controller set at battery 70 amp and phase at 150, peak amps on the CA have never gone above 35 or 40 or so.
I previously ran that motor in a 22 inch wheel on a MTB, with non programable 18 FET controller, even with the shunt wrapped in copper wire and soldered up, it never pulled much more than that.
So it seems it is a winding thing with this motor and whatever controller I feed it from, it is not going to draw more.

In this case, it is probably just as well. It is in the stand up kick scooter in my first post on this thread and with no brakes, doing 26 mph on that is scary enough when you get a front wheel shimmy.
Last edited by NeilP on Jun 05 2012 3:44am, edited 1 time in total.
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by Lebowski » Jun 05 2012 3:35am

NeilP wrote:In this case, it is probably just as well. It is in a 16in wheel on a stand up kick scooter, with no brakes, and doing 26 mph on that is scary enough when you get a front wheel shimmy ( front wheel is the standard scooter 8 inch)

how to kill yourself in the most fun way :mrgreen:

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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » Jun 05 2012 3:46am

Yep..the torque is amazing..My mate who is about 90kilo (196 lbs for the americans, 14 stone for the Brits)...even with him leaning forward on it, on gravel, full throttle will flip it and him straight off :lol:
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Re: What current can I push a 6 FET 4110 Lyen with?

Post by NeilP » Jun 05 2012 5:33am

Here is a bit of un- edited video shot on iPhone. This was with the 18 FET..it is actully more torquey with the 'unleashed' 6 FET

Controller is now under the deck and all wiring concealed

:) Only Irish coffee provides in a glass all four essential food groups: alcohol, caffeine, sugar, and fat :)

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