Re: 5KW 72V Controller 36 #4410 FET's, $108 #4110's $154

[Gordo]

Let him know that the ability to program is a big selling point, and will significantly increase his sales for 3 reasons.
1. More people will want it, because they can customize to better suit their own motors and needs. There are some settings that really are best taylored by the user, such as LVC, regen, security, 3 speed %'s, rev%, etc.
2. The performance chasers will push the limits, blowing more of them and buying replacements, but potentially leading to product improvement if there is a means to report failure types. With the ability to program they will also take responsibility and be more like beta testers, without failures being reflected poorly on him, the manufacturer. Send us what he thinks are solid settings and we'll beat on it first, and incrementally go up from there to discover the real limits.
3. We'll hack into being able to program it anyway, so saving us the trouble will make us more loyal customers.

I'll pay the extra for real 4110's on both. Also, put me down as a beta tester even before you get all the way satisfied with the end result. I'll take the $$$ risk no problem. I need some high power controllers in a big way, so I will just find others to buy in the meantime if these are delayed for much evaluation. Plus I have one of the larger varieties of higher power motors on bikes ready to go, which are running with safe boring controllers in the meantime.

John

Hi John,
I have discussed all of your points above with Leo. No can do.
This thread was always to end up as an open source. All I have done so far in keeping the contact info out of this tread is to try and pin Leo down on the source of the FET's.
I have also got the price down to $108 each, with $40 shipping and $103 for 10 pieces.
If you are prepared to order one, here is the contact info;
Leo Liu <chinagreentime@gmail.com> (I previously posted this in the other low-cost controller thread) http://greentime.en.alibaba.com/ DON'T CONTACT THROUGH ALIBABA, use the gmail account.+
My only reservation is that even though the 4110 are stated to be from Mexico and he provided pictures and proof, I am still a skeptic. This is obviously a very small shop, willing to make a few pieces at a time. My next move was to order one and see what I got, before leading other lambs to slaughter. Send Leo an email. He is very quick to reply. He can also supply 24 and 30 FET devices.
Other ES members have received 1500W 72V controllers from him and are happy with them. http://endless-sphere.com/forums/viewto ... &start=465
I have 5 of these controllers and so far 2 work fine. I did not buy them directly from Leo, but from DHGate, because of the "free" shipping. $40 total, each, landed at my door in 5 days. Seems impossible, but they are here. There are 3 different MB and chipsets for this controller listed as #OT100. Seems like #OT100 is a generic description.

Other than my experience with the 1500W's, I have no idea what the outcome of the 5KW will be. The info and the price is above for anyone who wants to order. Hopefully the results will be good and posted in this thread?

[John in CR]

Thanks Gordo. I'll be the guinea pig and let you know how it goes.

[sirius]

Let him know that the ability to program is a big selling point, and will significantly increase his sales for 3 reasons.
1. More people will want it, because they can customize to better suit their own motors and needs. There are some settings that really are best taylored by the user, such as LVC, regen, security, 3 speed %'s, rev%, etc.
2. The performance chasers will push the limits, blowing more of them and buying replacements, but potentially leading to product improvement if there is a means to report failure types. With the ability to program they will also take responsibility and be more like beta testers, without failures being reflected poorly on him, the manufacturer. Send us what he thinks are solid settings and we'll beat on it first, and incrementally go up from there to discover the real limits.
3. We'll hack into being able to program it anyway, so saving us the trouble will make us more loyal customers.

I'll pay the extra for real 4110's on both. Also, put me down as a beta tester even before you get all the way satisfied with the end result. I'll take the $$$ risk no problem. I need some high power controllers in a big way, so I will just find others to buy in the meantime if these are delayed for much evaluation. Plus I have one of the larger varieties of higher power motors on bikes ready to go, which are running with safe boring controllers in the meantime.

John

Hi John,
I have discussed all of your points above with Leo. No can do.
This thread was always to end up as an open source. All I have done so far in keeping the contact info out of this tread is to try and pin Leo down on the source of the FET's.
I have also got the price down to $108 each, with $40 shipping and $103 for 10 pieces.
If you are prepared to order one, here is the contact info;
Leo Liu <chinagreentime@gmail.com> (I previously posted this in the other low-cost controller thread) http://greentime.en.alibaba.com/ DON'T CONTACT THROUGH ALIBABA, use the gmail account.+
My only reservation is that even though the 4110 are stated to be from Mexico and he provided pictures and proof, I am still a skeptic. This is obviously a very small shop, willing to make a few pieces at a time. My next move was to order one and see what I got, before leading other lambs to slaughter. Send Leo an email. He is very quick to reply. He can also supply 24 and 30 FET devices.
Other ES members have received 1500W 72V controllers from him and are happy with them. viewtopic.php?f=2&t=29469&start=465
I have 5 of these controllers and so far 2 work fine. I did not buy them directly from Leo, but from DHGate, because of the "free" shipping. $40 total, each, landed at my door in 5 days. Seems impossible, but they are here. There are 3 different MB and chipsets for this controller listed as #OT100. Seems like #OT100 is a generic description.

Other than my experience with the 1500W's, I have no idea what the outcome of the 5KW will be. The info and the price is above for anyone who wants to order. Hopefully the results will be good and posted in this thread?

I drive by the controller of Greentime, from Mr. Leo Liu. I am very pleased. 48V 45A, sensorless controller. Headway battery, 16Ah and 9C engine. For several days I will get HS3540. I've peeked inside.

[Gordo]

That is a 1KW 15 FET, a little different than what John has ordered. What was the price and how long ago did you buy it?

[sirius]

That is a 1KW 15 FET, a little different than what John has ordered. What was the price and how long ago did you buy it?

32usd/pcs+23usd DHL shipping=55usd total
I not sure that it is possible to reprogram the controller. I'd replaced some of the settings.

[stewrobb]

Count me in 100%, I NEED IT FOR

[The Mighty Volt]

Guys,
I may have found a controller for 5KW continuous for $118 plus shipping to US/Canada for $35-$40. Minimum Order Quantity (MOQ) is 10.
So far I know the following;
1. 36 X 4410 FETs rated for max operating @ 72V.
2. All caps are 100V
3. Battery Current 100A+ continuous. (does not compute with 5KW power)
4. Not a "new design" 1000's in use for years on 3,4,5,6KW scooters.
Pictures and proper spec sheet coming. All information from "sales person", being confirmed by technician.

Do you plan to make a list, group buy??? I might be interested. Thanks.

[stewrobb]

I just spoke with Leo, as I am buying another controller at the moment for iovakind. When I asked about the 36 Fet, he instantly said that none of the controllers are programmable. I asked him if they had on chip protection, and he said they do now. So it sound like talking to him about programming these things kindof screwed us lol. I'm sure someone with experience in that could still get in... but it may be harder now, instead of just reading off the data. That's assuming it is true of course, but he did seem to be telling truth. Just thought I should let you know. I'm still going to buy one obviously, but it is sour.

[Kin]

For what it's worth, this happens to be the same guy I was talking to about some other project. Always sounded like he knew what he was talking about (had to put project on the side until later this month, so I have not ordered yet).

[The Mighty Volt]

Any news fellas?

[Doctorbass]

bump

Doc

[Gordo]

John in CR got one. I'm doing a Lebowski. Eventually.

[The Mighty Volt]

bump

Doc

Doc, I have posted some photos of the Mosfets in one of the controllers I bought.

http://endless-sphere.com/forums/viewto ... &start=150

Today I will open up the 72v 24 Fet and take some more photos and post them so people can see what the FET's look like.

Thanks.

[John in CR]

I keep telling my son we need to test the Leo 36fet, but he's yet to put it on Clown Bike. The thing is too big a brick to put on my SuperV without making a behind the seat rack. Plus Hubmonster deserves the Super36 I got from SteveO, but I've been lazy about the needed phase wire upgrade to push on Hubmonster's limits. SteveO ran it at 300A battery side with a 5303, so hopefully it will survive Hubmonster at 150-200A.

The Leo 18fet with 4110's, while being a bit light on the phase wires and traces, has been driving the high efficiency test motor at 70A peaks for a couple of months now without a hitch, which are proving to be hands down the best motors I've gotten my mitts on. I just need to work out making one very mid-drive friendly for the guys wanting to run bicycle size wheels.

[The Mighty Volt]

Remind the son who the father is.

If that doesn't work, tell him he is doing it for us

The 24 Fet is huge. 36 Fet must be an animal.

[binlagin]

.... Are these availible anymore? I'd be interested in the 4110

[John in CR]

Remind the son who the father is.

That's a bad thing, because I'm Mr Procrastinator as long as I have a working ebike. When out of commission I'm Mr Nobreaksorsleepinguntilebikeisbackontheroad.

If that doesn't work, tell him he is doing it for us

That's a better approach.

The 24 Fet is huge. 36 Fet must be an animal.

I'm still worried about the relative lack of caps. Does your 24fet have caps down the center channel between the fet rails?
It's a very large animal. Here's the Leo 36 (the silver breadbox) next to a Lyen 24fet (silver) and unknown scooter 30fet(black). Good thing Clown Bike has a controller rack behind the saddle, so any size controller can be accommodated. My Steveo Super36 is a monster too...not as tall or wide, but long as hell. Thank goodness my SuperV has a fat long straight downtube to accommodate that beast.

36 fet from Leo size compare.JPG (34.59 KiB) Viewed 541 times

OTOH the 18fet is smaller than other 18fet controllers I've had.

John

PS- Almost forgot. Here's the open end of my Leo36. The green circle was for me asking him about the lack of fets in that channel, to which his tech guys said was correct. I post the pic because you can see the copper power rails protruding below the board....No traces I need to beef up on this puppy.

36 fet from Leo open end.JPG (52.37 KiB) Viewed 541 times

[The Mighty Volt]

Howdy John, thanks for the info and the picture. I am not at home right now but I will whip that 24 Fet open and post a photo.

What is the significance of the number of caps?

Can we add more of our own??? Should we?? One other observation I had in the 24 FET was the singeing of a few of the wires, and some sloppy finishing. Nothing too-too serious.

If you could do me a favour and post a picture- any picture- of a FET in the LEO I would be grateful- I am still a bit sketchy about the grubby writing on mine, cheers.

Regards

T.

[The Mighty Volt]

Capacitors of the 24 Mosfet Leo








Trace Of The 24 Mosfet Leo






Alleged 4110 Mosfets Of The Leo 24 Fet







Shot Of How Close The Board Comes To The External Case.





The General Size Of The 24 Fet Leo

From Left to Right-

24 Mosfet Leo
18 Mosfet Lyen
15 Mosfet Hua Tong
12 Mosfet Lyen
12 Mosfet Leo

[Rumberopie]

Looks really good.
What are the measures for the 24Fet?
I wait for the first test!

[grindz145]

Man, the heatsink on the 36 Fet controllers are just BEGGING for water cooling.

[The Mighty Volt]

Man, the heatsink on the 36 Fet controllers are just BEGGING for water cooling.

How do you mean? You mean they are well adapted to it, or absolutely need it???

[John in CR]

The 36fet is working like a charm driving a hard to drive 2 turn motor. My son has an LFP size EV grin now. We beefed up the battery and tomorrow will get regen going and connect a CA. Now that he's close to double the acceleration of mine off the line, I need to finish my upgrades to the Sheriff and get Hubmonster back on the road. It's been itching to remind some others which hubmotor is the true king of the hill.

Everyone's heard of downhill racing. Well, we'll get a couple of video cameras and put together a clip of what uphill street racing is like. We'll start with just a warmup on grades similar to the Pikes Peak climb and then get into the nasty 20-30% continuous grade that make the vast majority of ebikes cry for mercy.

John

PS- If you mount the 36 where you might brush against either end, be sure to round off the ends of those heat sink fins with a file. I barely brushed my shin on the controller getting aboard Clown Bike, and now it looks like a miniature Freddy Krueger attacked my leg.

PSS- I want to do some real stress testing before signing off on this controller, but it's looking good so far.

[The Mighty Volt]

Cheers John, thats good to hear. Maybe the grubby finish on the FET's is just that- a grubby finish, and no more.

What you make of the Capacitors? I don't know shit from shynola when it comes to controller design, but I see lots of caps....not sure if that means anything of course.

I am thinking of mounting mine on the underneath of the BMX, so hopefully no accidents.

[John in CR]

3 caps on the input is ok, since I run big packs and try to reduce the battery loop and the inductance that comes with it. Only 3 moderate size caps protecting the FETs makes me a bit nervous though, especially when I see open circles for caps, 2 outside the heat spreader bar. Inside the channel of the heat spreader I see no circles so I guess it's okay that it's free of caps unlike my Lyen 24fet. Also, the distinct grouping of 6fets each, X 3 for each phase input and X 3 for each output side seems good to me. I've got lots of space and real estate, so if I buy more of them I'll get some of those fancy snubber caps BigMoose recommends to properly protect the mosfets and go to crazy power.

The proof is in the pudding. Every controller runs hot with these motors, so if this beast runs significantly cooler at 100A battery side and higher, then it really is a beast AFAIC, since I'm a caveman when it comes to electronics and pick up only a tiny bit of what the gurus share, so I only know a lot as a user not about the operation.