controller 72v

[pedalnet]

hello sorry for my english.
i have a bike with a 1000w hub motor in 48v and i need more speed. i would like buy a crystalite 5305 with a 72v lifepo battery .
but i don´t know which controler buy.
is the crystalite 72v 40amp a good option?
thank you

 

[chroot]

Hi,

I would recommend you get Lyen controller, These controller capable support up to 100v and Lyen is excellent reputation.

He sells in "New sale - item" section.

http://endless-sphere.com/forums/viewtopic.php?f=31&t=16605

 

[pedalnet]

hi
the problem is the battery
it is a lifepo4 72v 10amp

 

[dogman dan]

If you have a weak battery, then you better budget for a strong one. A controller could be set for low amps, but then you get lower performance.

Sounds like you crave 40 mph. So you will want a good strong controller like the ones from Lyens, and a strong battery to run it like 30c lipo.

 

[chroot]

Hi again,

Lyen controller can adjust the ampere via connecting thru the USB on your computer tweak the controller profile settings.

 

[John in CR]

For more speed you don't need a new motor, just the higher voltage on your battery pack and a controller. I'd suggest a programmable 18 FET with good mosfets capable of up to 100V fresh off the charger. That will give you flexibility in your upgrade path, and you can set your controller to match your battery and motor as you upgrade them.

John

 

[GBike]

If you are working with a 72V battery you'll need a controller that can handle that voltage. BMC (Brushless Motor Corporation) has just developed a 72V 50A controller. With a combination of a 72V battery and 50A controller your system will be operating right around 3600W, which should be more than enough power to get you going as fast as you need to go.

I had been searching for a long time for a 72V controller as I am building an electric vehicle for my senior engineering project. I eventually found and contacted http://www.ElectrifiedBicycles.com they got me the BMC 50A 72V and its worked out great.

 

[pedalnet]

hi
my bike go to 50km/h but i go to the work every day (24km) and it is slow.
the problem is in the battery i have a 10amp 72v lifepo4 battery very cheap
if i used a lipo 30c it is expensive

 

[justadad1957]

too many problems with your setup
you need to slow down
10ah72v cheap battery might do 2c or about 20 amps (1500watts)
if you demand 40 amps (4c) the battery might start sagging and voltage will drop (lower top speed than expected)
and will start to generate heat within the battery lowering performance even more
you might want to reconfig you batts to 15ah at 48v
top speed might be lower
but i am sure your batts will last longer lowering the c rate on a cheap 10ah pack

 

[pedalnet]

my other bike have a 48v 20amp battery and co very good
what equipment i can used for 70km/h?

 

[John in CR]

my other bike have a 48v 20amp battery and co very good
what equipment i can used for 70km/h?

We really need more info to properly advise you.
What speed do you get now with 48v? What motor is it? What size wheel? Total weight? Terrain- mostly flat or hills? Is your acceleration acceptable now, or do you want more powerful acceleration and more top speed?

 

[pedalnet]

hi
my bike is 50km/h it has a 1000w hub motor i need more speed
how much speed i have with a 72v 20amp controller and 5303 or 5305 crystalite?

 

[John in CR]

hi
my bike is 50km/h it has a 1000w hub motor i need more speed
how much speed i have with a 72v 20amp controller and 5303 or 5305 crystalite?

Going to 72V with the motor you have should get you to 70kph, though you'll probably need at least a 30amp controller. If you're chasing performance, like I said before, it's far better to get a controller with flexibility. Then you don't have to buy a new one every time you want to upgrade.

Regarding the X5's and speed and voltage, there are simulators that can tell you with good accuracy what to expect.

 

[FMB42]

I'm thinking that you'll need, at the very least, a battery capable of 25-30 amps continuous. Not many LiFePo4 batteries are capable providing this kind of current so again, consider a lipo alternative.

It sounds like you might have a Golden Motor 1000w 48v kit. If this is the case, then you'll want to talk with Icecube57 who, btw, has a lot of experience with over "volting" and "amping" these GM hub motors...