sen-no-sen wrote:If the motors are clamped ... it is that we can unclamp and sustain the assistance beyond 25 km / h.
There are tutorials here and there on the internet.
Several times I was "dropped off" on site by VAE while I was driving at 35 / 40km / h, and by people who did not seem to me to run on EPO.
After the de-clamping has the obvious consequence of limiting the autonomy and increase the wear of the engine.
How can you be sure that the pedelecs that passed you had an unbridled engine and not an aftermarket engine?You can actually "unleash" a brushless motor: by increasing (a little) its supply voltage.
This is only possible if:
a) the nominal voltage of the motor is lower than that of the battery (and generally this is not the case)
b) the controller can handle a higher voltage (usually this is not the case: a controller has a nominal voltage that corresponds to that of its engine: I have never seen a controller with choice of voltage)
So a 36V motor could certainly work "durably" at 48V but this implies greater technical constraints than a change of motor + controller ... to a more powerful 36V motor ...
I have been doing R&D in electric propulsion for 2 years, I don't think I'm wrong ...
On the other hand, which is quite easily feasible on most controllers,
it is to shunt the PAS (detection of the movement of the pedals) to replace it with an accelerator (or a simple button) to first have a permant help and lift the limit 25km / h assistance ... which would allow, even with only 250W to exceed 25 km / h (but not uphill: one watt remains a watt ...) provided the motor has a fairly high kV ... (kV = RPM per volt)
In 2 cases we make illegal use on the road but good when we see scooters 85 km / h on the periphery ... I think there is worse in terms of compliance with the Highway Code!