Programmer w/ understanding of VESC PC-side software language?

i guess an inductive load would smooth the current out more but still the question remains unanswered “can we do 200 motor amps?”, but I don’t want to be the guinea pig at 100$. I’ll do 40/150 today though.

What a nice gesture. You want others to try it out and be the guinea pig. :open_mouth: I don’t know how someone who is building his own HUB motors has so little knowledge about the background. I don’t want to claim that I have more knowledge, but I am not building my own motors. :joy: If I would tell you, yes it is possible to do 200 motor amps would you trust me?

@devin I read your same Amps/Watts/Ohms calculation stuff everywhere on this forum. I don’t want refute or confirm them, because that will not come to an end like you can see in other threads about the same topic over and over again. Lets just say I don’t have any plan about that topic. But let me ask you some questions. Did you stand on a electric skateboard once? Did you have used/seen a VESC in real life once and looked/logged the Realtime Data while riding it? How did you measured the 0.0415ohm? All your calculation is based on that, but what if the value is far off?

the .04 is from the vesc foc test.

I’m not asking others to do it but asking if it will be ok. people who know more about esc than me (motors are simple in comparison) hopefully can say. I’m not looking for someone to trust on this, I’m looking for explanation. trying to learn. what are you doing

If you trust the 0.0415 Ohm blind you should have no problem testing the limit of 200A, because it is a limit coded in QT. Why should there be a limit? I think just that people like you can expand them. :innocent:

Waste time answering you.

there’s confusion: the vesc is variable and takes input from the user and EVEN WITOUT CHANGING THE PROGRAM you can ruin your vesc. assuming that the resistance test is legit on the vesc is a far distance from deciding to put the motor amp settings at the limit.

how would you suggest testing resistance? most multimeters, including mine, aren’t accurate to such detail.

Over 4 wire resistance measurement. I was thinking that you just measure normally with a multimeter…

I dont understand why you ask about changing the max value to 700A before testing the 200A limit. When you first asked about the idea to set the value to the max possible in BLDC tool and what others think about that it wouldn’t be a problem for me. But no, open a new thread, disrespect @Ackmaniac`s answers and talk the same over and over.

Seems as the Board can only turn to the left when the Motor is on the right side :joy:

But we haven’t seen in the video that you accelerated full throttle from a stand still. Thought thats what the whole topic is about. Good would be also to use a data logger. You could use @evoheyax app or mine. Would be nice videos.

Oh and a helmet isn’t bad especially for test drives.

Long story short:

The current control loop of a standard VESC with 0.001 Ohm shunts can only measure 160A. ( 160A x 0.001 Ohm = 0,16V -> times 10 by the DRV = 1.6V -> times 2 because you’re measuring positive and negative voltages = 3.2V on an ADC pin which can sample max 3,3V )

If you crank the absolute max amps value higher than this, all protective features of the VESC are overridden.

The only way to use higher currents is to use other shunts. 0.0005 Ohm would be a good starting point, as there is a prebuilt firmware for these.

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160A DC 160A AC 160A Motor current 160A Battery current

Does not matter what, because the VESC uses the same both shunts to measure every current and with 0.001 ohm it can only sample 160A.

The whole discussion is relatively senseless because the motors don’t have sensors. So you need to give them a push to have a nice start without jittering. And there is nothing wrong about it. Only thing is that we are moving then and as a result of that the duty cycle is already so high that the battery amps will set the limit before those motor amps are even reached. And if you could reach the motor amp limit then it would be for a fraction of a second and then the battery amps take over.

With watt control mode it is possible to ride the motor that way but i still don’t see the point. And please no calculations again. You should setup the VESC with those values and ride it and share the experience instead of spreading calculations again and again. Because i think not many will do that to their motors and VESC or even be interested as long as they don’t hear that it is much better and also feels better.

BTW I would be interested how much AWG the phase wires of the motor have.

Well, you’re really starting on the wrong foot since minimum wage in the us is 7.25$/hrs… so if you only pay someone 5$/hrs you’re just cheap…

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Is every post in this thread supposed to be the same? Groundhogs day going on in here. :dizzy_face: