$30 reward for fixing this ebike problem

[Quentin_Rufin]

YO Ebikers,

I had this problem since November 2018. I need some help.

https://endless-sphere.com/forums/viewtopic.php?p=1455325#p1455325

I will give $30 to the person who provides the solution.

 

[billvon]

YO Ebikers,

I had this problem since November 2018. I need some help.

https://endless-sphere.com/forums/viewtopic.php?p=1455325#p1455325

I will give $30 to the person who provides the solution.

From the CA manual:

=======================
When the CA device is limiting power because one of these limits is active, the
diagnostics screen will capitalize the associated a or w limit flag. If the power
output becomes jerky and oscillates at this point that it is a sign that the
associated feedback gain term needs to be adjusted downwards until the
behavior is smooth via the WGain and AGain feedback terms.
=======================

 

[Quentin_Rufin]

YO Ebikers,

I had this problem since November 2018. I need some help.

https://endless-sphere.com/forums/viewtopic.php?p=1455325#p1455325

I will give $30 to the person who provides the solution.

From the CA manual:

=======================
When the CA device is limiting power because one of these limits is active, the
diagnostics screen will capitalize the associated a or w limit flag. If the power
output becomes jerky and oscillates at this point that it is a sign that the
associated feedback gain term needs to be adjusted downwards until the
behavior is smooth via the WGain and AGain feedback terms.
=======================

Man I love you. <3 I had this problem for wat too long.
What is the meaning of AGain. Is it the variation of Amp per second when limit is reached?

If you use Paypal, send me a paypal address by private message I will send you cash on it.

 

[billvon]

Man I love you. <3 I had this problem for wat too long.
What is the meaning of AGain. Is it the variation of Amp per second when limit is reached?

Here is what I think is going on:

For speed limiting the controller uses a full PID control loop, with proportional, integral and differential terms. (PSGain, IntGain, DSGain.) This is the "right" way to do it and lets you fine tune the response for the dynamics of the system.

For power limiting the controller uses a simpler control loop with essentially only a P term. The gain term for power limiting is WGain, the gain term for current limiting is AGain. In other words, if you set the current limit to 30 amps, then it will back off a little when you hit 30.01 amps if the gain is low, it will back off a lot when you hit 30.01 if the gain is high. If you get that fast juddering I would reduce that gain gradually until it feels better.