Last week I've been working on getting some axles with decent hardness (55 HRC minimum) and good precision/tolerances (h7) produced.
- CAD is done (thanks to the jumpstart by some forum users)
- Work drawings are done
- Steel research is done (it will be 42CrMo if produced in China or...
I do for the M500 though: they have an internal "burn-out" firmware they use for races.
It's meant to burn out the motor each race, but officially the motor is still 250w nominal so "race legal".
Sadly enough my bafang contact got silent pretty fast after telling me some details about it :(
Current only accepted standard is EN-15194-2017.
The older standard allowing mechanical measurement is depricated for a while by now.
This measurement was actually used by the TSDZ2 and other motors to be able to push just a little more power than actually allowed, with less efficiency.
250w nominal is the point of temperature equilibrium within the manufacturer allowed temperaturerange. Aka: the power consumption at the highest temperate allowed. (See: IEC60034-1)
So no, it doesn't literally call it "burning out the motor", but that's in practice what it means.
It gets a bit...
Your comments where 50% simply wrong and 50% super bad (risky, criminal).
(Not a good comment even iho, considering most of your mistakes where already explained multiple times on this very forum the last 5 months)
I think it's best not to listen to people that think CE compliance is based on a sticker ;-)
Thats utter folkelore. It's based on certification in accordance with the Machine Directive, the CE sticker is just an addition to that.
The Machine Directive applies to every machine sold OR "Put into...
While the whole unit needs to be certified, the rating is based on the temperature equilibrium of the actuall electromotor inside it.
No way to get the m620 legal as ebike.
One exception: If you fully hard limit it to 250 at all times (so peak and nominal) you might be able to self-certify it...
Time for me to chime in with all my prior research...
If Haibike CE certifies it (and not just by a sticker on the frame), they are legally on the hook for their fraud (which is precisely what they are doing).
However: There is one way they could be doing this legally:
By limiting peak power...
My personal interest in this has never directly been open-source firmware, just protocol reverse enginering.
For the reverse enginering i'm mostly waiting on new BESST versions, firmwares and motors to come out.
For the OpenSource firmware, as openly discussed, the only actual opensource...
The m500 can, in theory, perform the same as the m600.
Most likely they took off some motor windings and upped the max A on the controller a bit (the m500 could already do double anyway). This would also make it easier for EU compliance, because I think that if a government really...
Not very interesting, the same as the other way around.
No it showed incorrect power on the display. DUE to the shunt resistors being different.
Thats should be correct.
Well, thats not the wrong way. Thats just whats going to happen and precisely why no one did it to achieve what you propose ;-)
A quite typical government response: not building roads very well suited for cycling, which increases the amount of hits (and runs) and in response calling for bike registration plates.
So typical it's laughable, or just sad.