5000W motor on Aliexpress

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adamcooks

1 mW
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http://www.aliexpress.com/item/5000w-electric-bike-kit-5kw-brushless-electric-bike-conversion-kit-5kw-e-bike-wheel/1398558037.html?spm=2114.01010208.3.2.UceKN0&ws_ab_test=searchweb201556_2,searchweb201644_5_10014_10001_10002_10005_10006_10003_10004_62_9735,searchweb201560_5,searchweb1451318400_6151,searchweb1451318411_6450&btsid=5d3ac76e-9ab6-4597-9bbb-347b308b2be1

Has anyone used or purchased these motor? Any thoughts on purchasing from aliexpress? I am looking to build a new commuter bike capable of 31 miles in an hour, with some good hills ( richmond, CA ). Charge for 3 hours and return trip. 72V battery in the 35AH ballpark should get me there and back. My backup choice is a 4T MXUS3000.
 
Looks to me like with that choice, it would be able to do the commute a lot faster than an hour.

Till the cops see you. Personally, to ride motorcycle speeds in traffic, I'd want legal, insurable motorcycle.

Don't get me wrong, I've ridden illegal motorcycles on a commute to work. I was too young to get a license, had no title to the bike so I ran with a fake home made plate on it. It just got to be a hassle taking funky routes to avoid being seen all the time. After a year of that, I turned 16 and got my license and immediately got a legal vehicle.

Anyway, wouldn't a more practical choice be something more likely to top out at about 32-33 mph? Much easier to sneak since it goes within 5 mph of what is legal in your state. Maybe that motor, or the muxus 3000w but run it on 48v? I'm not saying no power, just not such obvious speed.
 
800 seems like a marginal deal for the kit considering the site and less than great reviews. Where are you from? There's better options in US I'm pretty sure.

As far as the aliexpress kit, it says max of 60mph on 96v, so 72v might be your best premade pack option for avg 31mph trip with hills. Like dogman said, watch the 'speed limits' though, and maybe consider getting away with conservative 14s and saving some money?

I've had good experiences with aliexpress. Pay with creditcard, and try to buy from a seller with a few customers, mostly happy. For what it's worth, that seller is probably offering a fair product for the price.
 
30-35 mph is just about where I want to be. From everything that I have read, running your gear at 80% will prolong the life greatly. While this kit is capable of 50mph, I don't plan on using full throttle...... too often. I am currently running a MXUX 1.2kW on 48V, which was great for my 26 mile commute to Berkeley from Vallejo, but we have since moved to Oakland. My current gear tops out just under the 30 Mph mark, I am WOT and discharging fairly deep into my 22AH LiFe4PO.

As far as I know, off the china boat, my options are the MXUS 3000 or a Cro? How about controllers, 18Fet from Lyen maybe? I have attached my Berkeley route to work, my new commute just adds 7 flat miles to the end. I do hear the illegal motorcycle talk and I do want to avoid any trouble with the law.
 

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What is your current motor/controller/battery setup? If you just want a few more mph, then you might could just up the voltage a little and get it with an add on pack. That would also increase your range a little. Most 48V 1000W DD kits will happily do ~35 mph on 14s rc lipo without a problem.
 
wesnewell said:
What is your current motor/controller/battery setup? If you just want a few more mph, then you might could just up the voltage a little and get it with an add on pack. That would also increase your range a little. Most 48V 1000W DD kits will happily do ~35 mph on 14s rc lipo without a problem.
Click to expand...


I am currently using a 22AH LiFePO4, 48V using a MXUS geared 1.2Kw motor, I am pretty sure my conroller is max 25A. Its a larger diameter geared motor, kind of a hybrid of sorts as it was explained to me. It pretty much tops out at 28mph and I slow down, with considerable effort on my part, to 15-18 on some of the larger hills. If I don't assist the motor going up hills it will slow down to 7ish mph, I don't mind pedaling.


http://gocarlite.com/product/high-end-geared-motor-kit/

http://www.ebay.com/itm/48V-20AH-LITHIUM-BATTERY-PACK-POWER-FOR-EBIKE-FREE-CHARGER-NEW-CELL-/261880817273?hash=item3cf9502679:g:X2YAAOSwu4BVzBwM
 
OK, I see the problem now. That motor is only rated for probably 350W being a geared motor, The 1200W is peak rating. No wonder you have problems on hills. So yeah, you're going to need a new motor. Any of the 48V 1000W kits should work fine for you with your 14s 51.8V battery pack. BTW, it's not lifepo4 if you provided the proper link, and the info there is correct. At 14s lifepo4, it would only be ~45V nominal and 50.4V fully charged. Not 58.8V.
 
5kw motor on aliexpress, with those thin little spokes.........not good.
 
5000w of power, but at a voltage that gets you a top speed closer to 35 mph is a fine idea. Wont' stand out so much, the battery will cost less, and plenty to get you up the hills without bogging down below 20 mph. Might climb em at 35 with that setup.

But build for 60 mph, and if you really ride all the time at 30 or so, you will be in a club with two members. You and Wesenwell. The rest get hooked on that speed, and ride much faster. Fine off road, or in states less worried about it than CA.

The downside of that particular kit, is to do that slower version you need a different controller. If the same vendor can send it with 48v controller, there you go. Otherwise, you'd be spending on a fairly pricy controller you don't need.

Might be worth it to go with the motor from Teslanev. Then get the controller you desire.

Also, I did not mention it, but most of those very big motors cannot fit on a regular bike, they are too wide.
 
What kind of battery , as how big is 72v 35ah ? 50mm that's a motorcycle motor. I'm happy with my muxus 3,000. I have many hills so got a 5t, if I did it again I think a 4t @ 72v 60amp. It can drain a battery. I guess I could use my three speed switch.
What frame are you going to use ?
 
Just for the record, I've never built a bike that will do anywhere close to 60 mph on level ground. I built both mine for 40 mph. I did get my 1000W bike to 61.4 mph once, but that was going downhill. Neither will get much over 40 mph on level ground with me on them. That's why I suggested a 48V 1000W kit. It will do ~35 mph on his 14s li-ion pack on level ground and will certainly climb steep hills a heck of a lot better than the current motor he has, which in my opinion the dealer uses misleading numbers in his description of the kit with his 1200W peak crap for a 350W rated motor.
 
http://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20160126110944&SearchText=500w+mxus+
Then I assume you're using the 500W BPM motor and not the MXUS 350W motor, or this one.
http://www.aliexpress.com/item/48V-500W-High-Speed-Brushless-Hub-Motor-E-bike-Motor-Front-Wheel-Drive-MXUS-Brand/32308470927.html
 
Thanks for chiming in Doug, I was going to text you today on the status of the MXUS3k. I am just trying to get a handle on some options.

I really like the MXUS motor, I was just unsure if the pricing which led me to aliexpress.

I can get a controller from Lyen for 199-299, and I'm assuming, based on ebay pricing, the MXUS 3K will be in the 350-400 ballpark. which should put me at 700, another 100$ for miscellany and I'm right in the sweet spot here. Any suggestions on the difference between the 18 and 24 FET controllers?


My current bike is a 19" fantom trail 29er and It holds my current battery in the frame. I am contemplating trading up to a 21" frame to accommodate the larger battery
 
He doesn't mind pedaling he said. But he won't be able to gear one of the big motors to allow pedaling at 35 mph. With the 16 tooth single speed freewheel, he'd need about a 65 tooth front ring to pedal at 35 mph, and actually push any.

But he could get a 52t front ring, and pedal along at 25 mph or so, at a dang high cadence. So he could pedal up the hills at 25 mph, or pedal while cruising slower.

Very few pedal their home made flyweight motorcycles. You pass 25mph in about 100 feet.
 
If you double the voltage, you double the watt hours. WH is real simple. AH times nominal voltage = wh. So 20ah x 51.8 =1036wh for your current pack. You're already at 14s, so you don't won't to add more than another 10 to get to 24s. Lot's of ways to charge a lipo pack safely, but a bms with all packs wired to itwould make for the easiest charging.

As for the controller, you won't need more than a 40A one to get to 40 mph. That's what I have on my MXUS 3000 4T motor. Although you may want one rated for more than the 1500W mines rated for if you plan on riding 30 miles at 35 mph. I'd suggest one rated for 2000W or more. I'd suggest this one.
http://www.aliexpress.com/store/product/24FET-IRFB4110-s-3000W-48-84V-80Amax-BLDC-motor-controller-EV-brushless-speed-controller-sensor-sensorless/313864_522263950.html
If you're going with 24s rc lipo, I'd have LVC set to 80-84V
 
Re the pedaling, you can always slow down to a speed where you can keep up with the motor, and add 100w or so of pedaling to the mix.

I just wanted to point out, that above 35 mph, it's seriously hard to fit that big a front gear on most bike frames. Many mtb's the biggest you can go is 48t.

Wes thinks everybody should run 24s. And I agree, everybody wanting to have his "bike" go faster than 40 mph should. But I think if you run a daily commute of 30 miles at 40 mph in California, they are going to take your ride.

48v with that motor is going to go faster than 28mph. But not enough faster to get you busted so fast. If you can contain your throttle hand, you will be one of the very few that can with a hot bike that goes 40+ mph. All you need is 48v, and a larger battery. Buy 48v 10 more, and you are set. Screw the hobby king batteries.
 
No, I don't think , and never have thought everyone should run 24s lipo, but he's barely going to reach 30 mph with the battery he has now on a mxus 3000 4t motor. And adding capacity to it will only increase range. At minimum I'd use an 18s pack for what he wants. A 20s pack will get him to 40mph with a 40A controller.
 
DSC_0809.JPG
I think that 20s will be my minimum target, while 22s10p is my goal, and 23s is my maximum with a 96V cut off on the controller. I have a rather large frame, I think I should be able to accommodate 230 cells, samsung 25r's. Let's hope my wallet agrees. I have my controller mounted behind the seatpost currently, any issues anyone see's carrying that forward. I have plans on 3d printing a duct / fender one of these days.
triangle battery size.jpg is the space I have to work with, my current battery is 155mm wide and I don't think that my body will accommodate much more.
 
adamcooks said:
http://www.aliexpress.com/item/5000w-electric-bike-kit-5kw-brushless-electric-bike-conversion-kit-5kw-e-bike-wheel/1398558037.html?spm=2114.01010208.3.2.UceKN0&ws_ab_test=searchweb201556_2,searchweb201644_5_10014_10001_10002_10005_10006_10003_10004_62_9735,searchweb201560_5,searchweb1451318400_6151,searchweb1451318411_6450&btsid=5d3ac76e-9ab6-4597-9bbb-347b308b2be1

Has anyone used or purchased these motor?
Click to expand...
Yep, this is the same as a cromotor, without the mods that are made at Zelena Vozzilla in Croatia.
I prefer the cromotor when readily available, for the little price difference. All my bikes but one, are built with a cromotor.
 
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