5304 on a Ping 48v 20ah battery ?

[MyPC8MyBrain]

Anyone running a Crystalyte 530x on a Ping battery ?

The 500w Grubee [Skyhawk] just doesn't seem to be making it in terms of top speed.

I guess my concern was regarding continious amperage draw from an Ebikes.ca controller
and 5304[?] motor.

Since a motor and controller are farily expen$ive, I thought it might be good to make sure I wasn't buying more motor/controller than I have battery to drive.

Stated Ping Specs:
Fit 48V Motor Wattage: 500 Watt to 1200 Watt, 800 Watt suggested
Voltage: 48 Volts
Capacity: 20 Amp Hours
Dimension: 150x220x190 mm ( 6 x 8 1/2x 7 1/2 inches )
Weight: 9.00 kg ( 20.00 lbs)
Charging Voltage: 61 Volts
Charging Current: <5 Amps
Rated Discharging Amperage: 20 Amps
Max Continuous Discharging Amperage: 30 Amps
Maximum Discharging Current: 60 Amps
Discharging Cut-off Protection: 35 Amps
Lifecycle: >1000 times

EBIKES CONTROLLER :
24-72V 35A Start Immediate Analog Controller, IRFB4310 Mosfets
1.22 kg (2.69 lbs)

Thanks for any input you can offer...

 

[albie]

errr... don't we have a duct tape thread for this???

 

[Link]

It'd be kinda weak on only 30A, but it will "work". :?

 

[TylerDurden]

It'd be kinda weak on only 30A, but it will "work". :?

Not sure "weak" is the best term...

It will easily deliver the goods at 1600W, and do it forever. It also has enough headroom to double your power if you feel the need.

It may be the most robust hubbie sold.

 

[Link]

Kay, maybe I use "weak" kind of loosely .

It'll be more powerful than most commercial setups, but compared to the kind I'm used to seeing here it's a little on the low side when it comes to wattage.

 

[TylerDurden]

Regarding speed, the hubsim puts it ~30mph at full throttle, pulling ~800W.

That's just what you need to hit, according to the 'zotter too.

My interpretation is: full throttle = 100% duty cycle, if you don't hit the current limit... you shouldn't since you'd be drawing ~20A. Good efficiency with those numbers.

Plus room for power on the hills.

http://www.ebikes.ca/simulator/
http://www.kreuzotter.de/english/espeed.htm

 

[Johnbear]

errr... don't we have a duct tape thread for this???

Still bummed the thread was locked!

 

[albie]

yeah coz now there is part deux!

 

[MyPC8MyBrain]

errr... don't we have a duct tape thread for this???

Yeah, i searched the duct tape thread and didnt really come up with what i needed.

Someone had mentioned that with the 35 amp controller, that the BMS would cut out in the pack from amp overload.
Another person asked the same question as me without a response.
So, I guess that was why I'm asking if anyone was currently using this setup and how it was working out.

At this point I think that any controller over 35amp is useless, since the BMS will cut off from overload.
So I'm limited by the battery in my options for motor and controller setup.

Anything i do will be an improvement over the 500w Grubee...
Zipping to work at 14mph is more pain than even the Ipod can cover up.

 

[albie]

you have to remember that top speed isn't dependent on current more rather than voltage.

what current affects is the acceleration. yes you are limited by the 30amp BMS cutout (as i have many times before), but there are ways around that (predominantly to bypass the BMS completely) which I would suggest you read up on in the two threads there and there is alot of information about it.

I've currently got a 50a controller running a 48v 15ah pack. to charge I use the bms... to run the bike i don't but i monitor everything through the Cycle Analyst i have installed onthe bike. The most i've gotten out of the bike with a bms is 35amp... but thats gently easing the throttle to that... without the bms, i've gotten the pack as high as 59amp momentarily (even if my controller is rated at 50a).

35amp... you would still be pushing around 800 - 1000w through the bike which is pretty much a road bike acceleration there so i wouldn't be complaining. and yes it would be faster than the the 500w Grubee...

this has been covered in the duct tape thread (part 1 and 2)