DanGT86
100 kW
I ended up with a free 98 honda cr125 frame i've been wanting to convert and found out its so stiff everyone hated them when it was new. Im sure they have come a long way in the last few decades.
crf450r 45kw race bike build
- Thread starter rivvs
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quelsurprise
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Hi,
do you have any details of what snowmobile the shaft was from?
I'm trying to track down something about 10" long that a KTM sprocket will fit on.
thanks
quelsurprise
1 W
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Think I just found a matching one, the Polaris XC700 looks like it's the same spline pattern
yes when I realized I had to start all over again for the case I stopped working on it for a while. I hope it is still strong enough!
I used skidoo one. any year from the 90s will work they are all the same. I do not know for polaris.
quelsurprise
1 W
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Thanks,
I'd gotten this silent chain set up cheap from Ebay to see if it could be used, and had forgotten about it when I knew I could use Gates belts and pulleys, the splines in the Polaris sprockets look the same as the KTM sprocket I have.
I guess if I can find a machine shop that can shorten the skidoo/polaris jackshaft and cut a keyway into that should work, we'll see!
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On the photos of the batteries it looks like some cells have less copper connecting the cells together then in some other spots, couldn't this make hotspots in the pack and baybe even unbalance of a series with high discharge?
It might be a good idea to have more temp. sensors
It might be a good idea to have more temp. sensors
Update on the bike.
I finished the battery and finished the wiring. I tested everything on the bench and the bms would close the contactor when I pressed the power button. So I installed the battery in the bike and when I powered on the bms I saw smoke comming out of the battery and the bms is dead again. I removed it from the battery and plugged the battery directly to the controller to test the bike and it is slow like very slow. And the motor jerk back and fort before spinning. and when it get going at like 20mph it start cutting out.
I finished the battery and finished the wiring. I tested everything on the bench and the bms would close the contactor when I pressed the power button. So I installed the battery in the bike and when I powered on the bms I saw smoke comming out of the battery and the bms is dead again. I removed it from the battery and plugged the battery directly to the controller to test the bike and it is slow like very slow. And the motor jerk back and fort before spinning. and when it get going at like 20mph it start cutting out.
Eastwood
100 kW
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- Jan 13, 2021
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I wonder why the BMS went bad..
that’s strange the motor is jerking and cutting out. It almost sounds like something non-battery related although somethings not right with the battery since it burned up the BMS. It almost sounds like the phase wires are not the right combination, just a thought. I truly hope you get this sorted out, my friend! I know this is got to be aggravating.
that’s strange the motor is jerking and cutting out. It almost sounds like something non-battery related although somethings not right with the battery since it burned up the BMS. It almost sounds like the phase wires are not the right combination, just a thought. I truly hope you get this sorted out, my friend! I know this is got to be aggravating.
That is what I tough too for the jerking but I redid the motor detection 4 times and it still does.
This is my first time using vesc, I only setted up an asi bac8000 before. here are my setting:
JRP3
1 kW
Did you try the motor detection with the Android app or just the PC? Mine never worked properly with my laptop but did with the app.
Only with the pc. I can’t with the Bluetooth because mine is an early version and the Bluetooth module need to be plugged in but I can not find the wiring diagram of it.
Running detection on the PC or app shouldn't make any difference but detection isn't always perfect and sometimes yields different results so running it a few times and averaging can help. That and make sure the detection current is roughly in line with your motor's size, so like running a very low detection current on such a large motor won't yield good results. If I recall you want like 10% of your target max current or something like that.
Also based on those screenshots the motor has an encoder so I believe there is an encoder detect that works the same way as the hall detect and is probably done along with the whole motor setup detection so rerunning the detection may sort that out if the encoder timing is off.
Also based on those screenshots the motor has an encoder so I believe there is an encoder detect that works the same way as the hall detect and is probably done along with the whole motor setup detection so rerunning the detection may sort that out if the encoder timing is off.
JRP3
1 kW
A few of these controllers have had communication issues with the PC connection.
I did the encoder detect but not sure if it is right or not.
j bjork
1 MW
There are some differences between your numbers and mine. I have 2,8mohm resistance, 64,65uH inductance and 29,04uH in Ld-Lq difference. There are other differences too, I have some pictures I can post in the evening.
How do you do the motor detection? I havent used the choices on the start screen, I used other values from a you tube video from 3shul.
How do you do the motor detection? I havent used the choices on the start screen, I used other values from a you tube video from 3shul.
At first I did the motor detection like the 3shul video then the last few time I did it with the base vesc tool setting. I never get the same value exact value. I will try like scianiac said and do it wih 10% of max amp. Maybe there is a problem with the encoder setting.
Were you able to get the temp reading from the motor? mine is always at 28 degree.
What current/power setting where you using for the previous detection modes? In my tuning I did the detection at a few different power levels and did see a bit of a trend of some values changing with higher detection current levels while some didn't much. And then if I recall I used the results from the higher test currents. I don't recall if 10% is the exact value I heard but you get the idea, using 1% of your target current is not going to get good results and same with 50% probably so you want something that can give the controller some real feedback but not a crazy amount.
Using the logging tools on the computer program also can help, I think there is a section that will show motor rotor angle so if you find that and spin the motor by hand you should see the position change nice and smooth from the encoder, same when running.
Also getting the bluetooth connected, helps a bunch because you can have the app running and when it cuts out you can see what the fault is and you can also data log tests. If it's a standard vesc style bluetooth module I think they all have the same wiring pinout.
Using the logging tools on the computer program also can help, I think there is a section that will show motor rotor angle so if you find that and spin the motor by hand you should see the position change nice and smooth from the encoder, same when running.
Also getting the bluetooth connected, helps a bunch because you can have the app running and when it cuts out you can see what the fault is and you can also data log tests. If it's a standard vesc style bluetooth module I think they all have the same wiring pinout.
I previously followed this video by 3shul for motor detection.
my problem with the bluetooth dongle is that there is no indication of what cable is what so I do not know what is rx tx 5v etc
JRP3
1 kW
Have you looked at the pin out in the manual?
yes I have the pinout from the controller. But the bluetooth dongle has no pinout to be found. just 4 wire comming out. Also I have the older version cl700 so it does not has the blug already made like in this manual. I shearched wih the bluetooth model number and still did not find pinout. the dongle is from 3shul.
Did you look on the bluetooth module's circuit board, it looks like they are often labeled on the board itself. If not does it have a connector already on it, you can probably match that with the esc brand, looks like some use common pinout but not all.
j bjork
1 MW
Here you go, hope it helps. I know that hackey messed with dead time compensation and the transition to sensorless.
I dont remember what else unfortunately.
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