The Zero have torque control throttle ?

[Doctorbass]

I did many measurement on my zero and with the Cycle Analyst I installed and i noticed that the throttle act exactly like a torque control, unlike the commun ebikes that have a throttle that set the speed. If i lift the rear wheel ( Only friction load on the motor) and turn just a little bit the throttle, the motor rpm accelerate until the max speed is reached. Under these conditions, the only way to have the motor to go lower speed is to really precisely turn the throttle a fraction of a degree, otherwise it go full speed. ( On the road it's different since the motor is normally loaded)

And the current limit seem to be proportional to the speed of teh motor... a kind of protection to avoid too much energy lost in heat when driving the motor at low rpm.

That's why i think it's a torque control mode. But the alltrax controller dont do that so my guess is that it's the MBB that is in serie with the throttle signal that overide the throttle to create this function.

Tonight i would test this theory by bypassing the Mbb and having the throttle directly connectd to the controller

Doc

 

[parajared]

I have read about this in the zero product reviews. Zero has a problem where throttle seems to be pretty much all or nothing. The reviewers were having problems with it wanting to pull a wheelie on them.

 

[Alan B]

Be careful, Doc!

I test drove a Zero. The throttle has great control. But it doesn't develop a lot of torque at low speed. As the speed increases the available torque increases. It is not good for wheelie control I suspect because it doesn't have that huge torque at low speed. Keeps the motor cool, efficiency high, and reduces the risk to the rider who may not be able to control it.

 

[Doctorbass]

Be careful, Doc!

I test drove a Zero. The throttle has great control. But it doesn't develop a lot of torque at low speed. As the speed increases the available torque increases.

Yeah i know, it's like the RPM sensor send signal to the main bike board and than it overide the throttle to keep current proportional to the speed it detect. Faster = higher current limit.

But i want it max current anytime i want to. Just like the MX and X model does

Doc