show my e-bike!!!

[Reid Welch]

Just when i think Reid cannot be any weirder... he surpasses all expectations. :?

:lol:
(ADV)

The notable quote above
of relative normality
came from a guy (Gaston)
who sits

atop a ten thousand dollar (stock) pile

----

Being a good and helpful fellow,

may I note

that for easing
the Pain and the embarassing Itch of piles,

nothing is better than


Preparation H(ubs)

Buy Some, and BUZZZ, Today.

Your asshole will thank you


"Thank you"

 

[xyster]

Preparation H

Have you ever wondered what ever became of Preparations A-G?

 

[Reid Welch]

Preparation H

Have you ever wondered what ever became of Preparations A-G?

No! I never wondered before. Now I wonder.

What became of Preparation A?

Preparation B?.....

huh! I will research.

aiicsu, we are not crazy. We just like to make laughs here.
OK!! Please send my FREE BATTERY.

I will pay with poems and jokes... and $500. 8)

 

[Reid Welch]

Android Ynot of the Future



:wink:

 

[xyster]

No! I never wondered before. Now I wonder.

What became of Preparation A?

Preparation B?.....

Presumably, they never made it out of the laboratory. There seems to be a conspiracy of silence regarding the fates of Preparations A-G, so I'm thinking the cover-up must be designed to hide hideous deformities and diseases resulting from tests of Preparations A-G. Uncover the truth for us, Reid! But be prepared, for truth is sometimes inflaming, and certainly not always soothing....

 

[Reid Welch]

Poor aiicsu! We have HIJACKED your thread.

This is what happens when an e-biker has no battery (yet).
There's nothing for him to do!

English proverb: "Idle hands are the Devil's tools".


Preparations A to H


Preparation A
was a small article.
Preparation B
bad balm for the bum.
Preparation C
treated bread for crumbs.
Preparation D
was every bit as dumb.
Preparation E
hot and peppery.
Preparation F
a sort of post-coital Jiff.
Jiff's a brand of peanut butter
Preparation G
hit that spot bereft.

Preparation H
is the only glop that's left.




"A-H So!"

 

[BiGH]

I always thought preparation H stood for "preparation Haemorroid" and there was no A-G. kinda like calling anti wart paint "Preparation W".

and was chosen to lessen the effect for americans who didn't wanna be seen carrying around a tube that had "HAEMORROIDS" written in bold

 

[xyster]

I don't know how to chioce them,
I think the Preparation B and C that it is suitable,

:lol:

Just be very wary of Preparation WG (wheat gluten)

 

[josh]

Hi all, useful forum

Nice looking setup aiicsu, very compact, neat & stealthy :wink:

I have a question about the motor performance: the torque graph shows that peak torque at ~175rpm, only slightly less than the ~195rpm at peak efficiency (is that curve for the 36V motor geared for 190rpm?). Is this correct, and how does that affect hillclimbing with this motor?

I'd be considering possibly putting the motor into a front 26" wheel, so max speed at 36V of ~15mph/25km/h, but if that curve is correct peak torque would occur at a rather high speed ~13.5mph/22.5km'h which would seem to limit hillclimbing to about 5-7% or 1 in 15-20, depending on rider weight and legpower input, does that sound right to you?

I hope you can help clarify this for me, thanks

 

[The7]

I think Andrey's bike had 6 wires (3 big, 3 small) coming out of the motor. I couldn't quite figure out what the 3 small wires were for.

I think Andrey has an new version of the sensorless motor. The 3 large wires are for power winding and the 3 small wires are for back emf signal winding.

The switching PWM component of 3-phase voltage in the power winding would confuse the sensorless controller. The controller uses the zero-crossing of the back emf for commutation. Very complicate filtering technique may be required to filter out the harmonics to obtain the fundamental frequency for variable speed drive.
An delicated small size winding could provide a less noisy back emf. Much simple signal filtering could be used. More turns could be also used for the signal winding to obtain a larger back emf so that the commutation could start at a lower motor rpm.

Since this is a free-wheeling version, the controller is required to turn the motor initially by electrical means. This could be done by injected an very low frequency 3-phase into the power winding until the commutation takes over by the back emf signal. This initial power required is very small because it needs only to turn the motor only. It is usually unable to obtain high torque for the sensorless BLDC motor before the commutation. High torque will be obtained if the commutation takes over.

For hub motor without free-wheel (like Xytle hub motor using pedal-first controller), this initial electrical power is not required because the initial pedalling will also turn the motor.


PS. I know a bit about Kalman Filter.

 

[efreak]

Hello all,

forgive me but can you not place internet orders from some manufacturer in China for batteries at a better price.

That would be Very nice

Thanks for this

our friend still logs on I wonder?

 

[andrey320]

Is this thread dead? I just found it....
Is there a possibility to upgrade my bike to 36V?

 

[xyster]

Is this thread dead? I just found it....
Is there a possibility to upgrade my bike to 36V?

Since your question is a different topic, you'll probably get a more diverse response by starting a new thread.