For ebikes to fit into the new alternative EN15194 type AB definition they would have to be pedelecs. That only allow power when the rider is pedaling forwards, and are below 25kph. So that rules out all throttle only bikes from this category. Leaving us with the old 200w definition.
I have read through EN15194 again now, and still think is is pretty crappy in describing the power limits. The 25kph limit is pretty well described. Saying no more assistance from the motor above that speed. Period. End of story.
No good. The power definition on the other hand has holes all through it. It can be measured in two ways:1) Section 4.2.7 - As per EN60034-1 - when measuring the power at the motor shaft.
This definition (as I explained above) is all about the safe operating power of a motor, and does not define the actual power output. FAIL
This would let the manufacturer just rate it for 250w, saying if you load it at that it will last. Done.
But the motor in use could be loaded much more allowing higher powers without restriction, and they just rely on the 25kph limit stopping people getting stupid.
OR they have a different method to measure it at the wheel.2) Annex D - Maximum Power Measurement - Alternative Method - when measuring at the wheel
Test method is hit the throttle from a dead stop (no pedalling allowed, PAS sensor overridden) and time how long it takes to travel 20m, with the bike loaded to 150kg. Then plug it into a formula they specify to determine power.
P = m * (2*D^2) / T^3
P = 150kg * 2*(20 metres)^2 / time^3
The way I read it, if your bike travels 20m from a deadstop in less than 7.8 seconds, your over the power limit. So it is in effect an acceleration limit.
This would be easy to design around if you we happy with a soft start.
Bottom line this new EN15194 definition is really about allowing EU bikes to be sold here. But due to the 25kph power limit, won't be that attractive to the young and fit, but will be quite good for those that like a more leisurely pace as you can get more power than what our current laws allow.