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esaj

Electric Unicycle Terminology

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Thanks so much @esaj !  What would this forum (and the world euc community) do without you?  Pinned (although you could do it yourself too).  :D

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Good addition to the eWheel performance post I made about a month back.

I would recommend there be something in the section on 'Out-lean' how the pedal-tilt-back helps with a feedback mechanism that prevents riders from going beyond the max speed capabilities of their eWheel. In my opinion, this is really important topic that, especially newbies, should be aware of. 

Edited by Jason McNeil
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Good addition to the eWheel performance post I made about a month back.

I would recommend there be something in the section on 'Out-lean' how the pedal-tilt-back helps with a feedback mechanism that prevents riders from going beyond the max speed capabilities of their eWheel. In my opinion, this is really important topic that, especially newbies, should be aware of. 

Good point, I also had forgotten to add tilt-back in terms altogether... added tilt-back & overspeeding, and mentioned tilt-back in out-lean.

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@esaj would you identify the mosfets that need to be shunted to prevent BMS shut-off please in the photo below!?

The factory says it will replace my generic's PCB to satisfy their warranty obligations!! - I'm not holding my breath - they have been evasive and unhelpful so far.

Even if I stuff up the EUC is unusable now anyway!

I'm expecting a N1E+ any day now.

IMG_8773.JPG

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Please correct the spelling 'tire' to 'tyre'. Also, an euc is not a bike, why using pedals? You're not pedalling at all. Footrest or similar would be more appropriative. The rest is perfect! Thank you very much @esaj! :)

 

 

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1 hour ago, AlanR said:

@esaj would you identify the mosfets that need to be shunted to prevent BMS shut-off please in the photo below!?

The factory says it will replace my generic's PCB to satisfy their warranty obligations!! - I'm not holding my breath - they have been evasive and unhelpful so far.

Even if I stuff up the EUC is unusable now anyway!

I'm expecting a N1E+ any day now.

IMG_8773.JPG

While I'm not qualified enough to tell people which mosfets to shunt and which not from a picture alone, I can tell you this:  Don't shunt any of those, those mosfets are the motor driving half-bridges!! That's the mainboard, the mosfets that are to be shunted are in the BMS (Battery Management System) -board that's inside the battery pack (yeah, the shrink wraps need to be opened, at least a little bit). Hobby16 has a nice collection of BMS-pictures from various wheels here, with instructions: http://forum.electricunicycle.org/topic/459-electric-unicycles-bms-problem-and-solution/   The easiest solution, if available and easily recognizable, is to shunt between P- and B- with a thick wire, no need to solder the mosfets, so no risk of shunting the wrong mosfets. Do read about the dangers too (since the discharge-side protections are gone after shunting, you really don't want to short the battery by accident...)

 

22 minutes ago, Azuro said:

Please correct the spelling 'tire' to 'tyre'. Also, an euc is not a bike, why using pedals? You're not pedalling at all. Footrest or similar would be more appropriative. The rest is perfect! Thank you very much @esaj! :)

Hmm, is "tyre" vs. "tire" some  UK vs. US -English difference again, like "colour" and "color"? ;)  

The "footrests" have been pretty commonly called "pedals" in the forums, I think people know what's being meant by pedal even if they themselves call them footrests.. you don't "pedal" a cars' gas pedal or aircrafts' rudder pedals... although many sources say pedals are "foot-activated levers" (which isn't that far off, there is a lever-effect between the pedal and the EUC itself), I picked just the one source that best supports my use of it (Merriam-Webster)  ;)

pedal

: a flat piece of metal, rubber, etc., that you push with your foot to make a machine move, work, or stop

The definition's pretty much spot-on, you push the pedals of an EUC to make it move or stop :P 

 
Edited by esaj
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39 minutes ago, Azuro said:

Please correct the spelling 'tire' to 'tyre'. Also, an euc is not a bike, why using pedals? You're not pedalling at all. Footrest or similar would be more appropriative. The rest is perfect! Thank you very much @esaj! :)

There is a saying "Put the pedal to the metal". :D

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@esaj  Thanks for the reference - on the BMS modification - hopefully I can identify the relevant connections!

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Thank you esaj to put them together!

A suggestion about Hall sensor.

The new generation control board use Hall sensors to detect motor current. May be use Hall position sensor and Hall current sensor to distinguish them.

 

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12 minutes ago, Jimicyle said:

Thank you esaj to put them together!

A suggestion about Hall sensor.

The new generation control board use Hall sensors to detect motor current. May be use Hall position sensor and Hall current sensor to distinguish them.

 

True that, I'll try to get around to update the list a bit...

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Hi there,

 

Can someone show a video of power braking? 

 

I've tried but only seem to out lean and incur shut down. 

 

If be keen to see the technique of this. 

Thanks! 

Edited by Knoxious

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On 4/7/2016 at 6:45 PM, Knoxious said:

Hi there,

 

Can someone show a video of power braking? 

 

I've tried but only seem to out lean and incur shut down. 

 

If be keen to see the technique of this. 

Thanks! 

Have you searched Youtube?  That is an interesting question, I am about to search Youtube but even if I find one I don't know how to post it.

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On 08/06/2016 at 0:45 AM, steve454 said:

even if I find one I don't know how to post it

copy paste the link and type in a space (and/or enter). 

On 08/04/2016 at 1:45 AM, Knoxious said:

I've tried but only seem to out lean and incur shut down. 

You can't really prevent this by a specific technique apart from braking more gently. Generally, keep the upper body vertically upright and the knees flexible. To brake rather don't lean back, but push the wheel with your legs in front of you. 

Edited by Mono
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the content describe detail function of every part of EUC. Especially, the end of  this content tell riders why your E-wheel shut down and you falled.

very very useful topic

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I was looking at some of the products on the IPS website, and I was wondering what "IP Level" means.

Is that term specific to that manufacturer, or is that an industry-wide term?

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37 minutes ago, sanman said:

I was wondering what "IP Level" means.

Ingress Protection (IP) and what it means
The IP Code (or International Protection Rating, sometimes also interpreted as Ingress Protection Rating) consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures. The standard aims to provide users more detailed information than vague marketing terms such as waterproof.

http://www.dsmt.com/resources/ip-rating-chart/

 

Edited by MaxLinux
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Ok, this post was near to 2 years old. Updated some stuff that has changed since:
-Only mentioned 16-cell series as common battery configuration, nowadays 20S is also very (if not even more) common
-Stroke out the warnings about BMS cut-outs, these seem to be a thing of the past, now we deal with melting wires, broken gyros and whatnot... :rolleyes:
-Ninebot was the only one offering "over-the-air" -firmware upgrades at the time, now most mainstream manufacturers have those
-Hall-sensor based current measurement seems to be more common place than plain current sensing resistors nowadays
-Suggestion of minimum of 500W+ motor for heavy riders updated to 800W+
-Mention that modern wheels usually have separate inner- and outer-shells
-Firmware-based power cut on overspeed seems to be a thing of the past, overleans/overpowering still exists, as well as burning boards
-Removed the link to BMS shunting, anyone buying something newer than late 2015/early 2016 wheels shouldn't need to do this anymore? Do note me if that's not the case
-Added "MOSFET" in technical terms, as it comes up every so often
-Redefined "overspeed", somewhat 

-Clarifications of some terms, other minor fixes

Anyone know of other terms that should be added?

Edited by esaj
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