torqueboards
1 MW
Nice Ben. I think it is helpful if all private PM questions which are asked are also posted here. Just suggestion. Save you time from re-answering too.
[ 348.284156] usb usb3-port1: unable to enumerate USB device
[ 354.416224] usb 3-2: new full-speed USB device number 22 using uhci_hcd
[ 354.536221] usb 3-2: device descriptor read/64, error -71
[ 354.760126] usb 3-2: device descriptor read/64, error -71
[ 354.976232] usb 3-2: new full-speed USB device number 23 using uhci_hcd
[ 355.096214] usb 3-2: device descriptor read/64, error -71
[ 355.320102] usb 3-2: device descriptor read/64, error -71
[ 355.536149] usb 3-2: new full-speed USB device number 24 using uhci_hcd
[ 355.944174] usb 3-2: device not accepting address 24, error -71
[ 356.056110] usb 3-2: new full-speed USB device number 25 using uhci_hcd
[ 356.468171] usb 3-2: device not accepting address 25, error -71
[ 356.468248] usb usb3-port2: unable to enumerate USB device
Connect the ESC to the USB port of your computer and click “Connect” in BLDC Tool. The lower right corner should now say “Connected”. If you have gotten this far, you should be ready to connect a motor and configure the ESC from BLDC Tool.
torqueboards said:You'll need the Stlinkv2 and/or Stlink board to go with your VESC. You cannot connect VESC by usb only.
VESC needs Stlink, USB + Power.
lizard said:Has anybody done some tests with higher currents or in RC cars yet?
I'm planning to put the VESC in my RC car. I don't have exact numbers, but from what I have seen in comparable setups it draws somewhere between 100 and 200A during acceleration (with RC ESC without current control). But that is only for short periods of time, maybe 3-4 seconds. Average current consumption is somewhere around 40A, runtime is about 10 minutes on a 6s 5000mAh pack. Car weighs around 3.7kg with Castle 1717 1650kv motor and is geared for 160kph.
I have read that maximum current limit is about 150A because of the shunts.
Can I just set it to 150A and try it out? I am not sure how fast the heat builts up in the FETs, I assume it will not get too hot if I'm a little careful and check temps often? Or will the FETs overheat in a second or so (faster than the temp sensor can probably sense because it's not inside the FETs) when I run 150amps through them?
Barndom said:lizard said:Has anybody done some tests with higher currents or in RC cars yet?
I'm planning to put the VESC in my RC car. I don't have exact numbers, but from what I have seen in comparable setups it draws somewhere between 100 and 200A during acceleration (with RC ESC without current control). But that is only for short periods of time, maybe 3-4 seconds. Average current consumption is somewhere around 40A, runtime is about 10 minutes on a 6s 5000mAh pack. Car weighs around 3.7kg with Castle 1717 1650kv motor and is geared for 160kph.
I have read that maximum current limit is about 150A because of the shunts.
Can I just set it to 150A and try it out? I am not sure how fast the heat builts up in the FETs, I assume it will not get too hot if I'm a little careful and check temps often? Or will the FETs overheat in a second or so (faster than the temp sensor can probably sense because it's not inside the FETs) when I run 150amps through them?
Vedder have the VESC on a RC car
http://vedder.se/2014/05/.
The specs says 240 A for a couple seconds. About 50 A continuous.
http://vedder.se/2015/01/vesc-open-source-esc/.
djmeistro said:anyone got two VESC for a reasonable price?
okp said:@onloop : what are the specs of the capacitors used ?
silviasol said:Something to think about. Fake components are used very heavily in china. Any heavily used component like the arm chip or drv8302 for sure has counterfeits made in china. A drv8302 is $15 for authentic, a chinese company that is using fakes probably gets them for under a buck. From the pictures of the beta boards the printing on the both of the pinned chips do not match up with the chips I have purchased earlier this year and do not match up with vedders board pictured on his site which is a much older revision of his so so the chips used on the beta's could be a much older version or could very well be fake. If they are fake then who knows how different they are from the authentic chips Ben buys directly from mouser and does all testing with. Seeing as how the components even when purchased in bulk are $70 to $80 USD plus the cost of the board finding a company that will use authentic components and not fakes and build the board for a low price in china does not seem logical. There are three people so far on this thread that had stated they did not work after a short while so I am just saying this. I am sure you know I am selling these as well, I really do not care if you sell them or at what price but keep in mind you would be selling Ben's board with possibly counterfeit components. The way to tell is the printing on the chip, authentic chips will have very high quality ink that will not scratch off and all letters are exactly the same shape/size down even looking thru a magnifier like pictured. I would confirm with your manufacturers that they are using actual authentic chips and not counterfeits.
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