50 kV motor for Ping battery?

[arnie1]

There are several threads on 10+kilowatt motors. All well and good, but what kind of battery can provide that much power for any distance? I've got a 48V, 20 AH Ping running a C-lyte 408 on 26 inch wheel. It can handle 2% grades but bogs on 4%. I want better hill climbing with top speed of 28 mph, just enough to outpace the roadies. My bike is a lwb recumbent so there is room for motor, drive line, and battery. Motor could direct drive on left side or right side thru a transmission.

Goals:
1.) Single stage reduction
2.) Non-fussy, robust controller
3.) Ping Battery
4.) 30 mile range
5.) Dependable for 3000 miles/year
6.) Lighter than Crystalyte hubmotor

Is there a sensored 50 kV 2 kW RC motor out there that would do this? I'm willing to pay for quality.

 

[jmygann]

http://www.thesuperkids.com/15wabmcbr24m.html

 

[arnie1]

This BMC motor is a candidate but not up to RC performance for weight or size. At 80% efficiency it's about the same as a Crystalyte hub motor.

 

[jmygann]

i also have 48V, 20 AH ... looking for motor ...better than cyclone

Powerpack is the best I can find so far ???

 

[wineboyrider]

$380 and the controller, not bad if you ask me?

 

[www.recumbents.com]

I can recommend the BMC 600 watt too. I'm using it with a ping 48V 20ah battery. Goes up hills nicely. It will draw enough current to shut down the BMS when you run it over 2000 watts, so you need to limit the current, but you probably know that already.

-Warren.

 

[jmygann]

I can recommend the BMC 600 watt too. I'm using it with a ping 48V 20ah battery. Goes up hills nicely. It will draw enough current to shut down the BMS when you run it over 2000 watts, so you need to limit the current, but you probably know that already.

-Warren.

wheel size ? tooth ratio ??

the 1500 watt model is different from the 600 is it not ?

 

[www.recumbents.com]

It's an MTB with 26" wheels. I think this motor has the "standard" gears, not the "torque" gears.

You can read all about it here: http://www.recumbents.com/wisil/e-bent/zcommuter.htm

-Warren.

 

[jmygann]

This BMC motor is a candidate but not up to RC performance for weight or size. At 80% efficiency it's about the same as a Crystalyte hub motor.

which RC motor are you speaking of or considering for your 48 volt pack

 

[arnie1]

I don't have an RC motor. That is my question. There are threads for 12 kW and 14 kW motors. They would need far more battery than a 1C Ping to reach anything close to their performance potential. (Ping's are claimed to be 2C. At 1.3C my Ping BMS lost its magic smoke. It was a long slow 22 mile ride home. No fun.)

Ping batteries have the advantage of coming ready to run. Ping provides vendor support. Li-Po's are not that developed. A builder has to assemble packs or cells, come up with a BMS, and figure out a charging scheme.

This is just another thread from a builder who wants to buy a reliable lightweight efficient motor that turns slow enough for single stage reduction. I'm looking for a RC motor as reliable as a brushless hub motor, not a science project. This motor is for a scratch built lwb recumbent. Building it is enough challenge for one winter.

If the 14 kW 94% efficient motor discussed on another thread is real, connects to a sensored controller, is 50 kV, it should run a long time given a Ping 48V 20 AH battery could never drive it beyond 2 kW. Where can I buy one?

When Li-Po's are more turn key, or A123 cells from the new Livonia, Michigan plant reach the aftermarket, I can upgrade batteries and get fuller use from a 14 kW motor. Today 1.4 kW is probably realistic.

 

[Desertprep]

Does anyone know how much that 1500 watt motor weighs?

 

[jmygann]

My guess is arround 6 lbs ?

"I am trying to work with BMC to on getting motors directly for these babies. There motors seem a bit under-rated but I need to keep this thing designed for all conditions and riding styles. They have a good reliable 1250w for the street legal one, 1500w (I've been running at 4kw), and a 4500w I hope to push.

Here is the street legal 1000w one, weighs in at under 6lbs:"

http://endless-sphere.com/forums/viewtopic.php?f=28&t=22560&start=60

anyone have them ??

 

[etard]

There's also the 75 KV Collossus, it's only 4 lbs. and could be mated to a Lyen's sensorless controller for a seemingly relaiable setup. Although, I am not sure if the controller is up to the electronic rpm's of the motor. Lyen's would know...

 

[jmygann]

There's also the 75 KV Collossus, it's only 4 lbs. and could be mated to a Lyen's sensorless controller for a seemingly relaiable setup. Although, I am not sure if the controller is up to the electronic rpm's of the motor. Lyen's would know...

What happened to it ?

has anyone used it ?

"The power 7kw - peak
75kv - lower kv for more simple bicycle setup . Plan is to run them without gearbox , just sprocket reduction"

http://endless-sphere.com/forums/viewtopic.php?f=31&t=20292