Solved! Braking issue with fully charged battery

ESK8 Electronics
82

For flats if I’m riding for around 15 -20min I overheat with a heatsink. Without the heatsink, I overheat after around 5min. Enertion is saying my best bet is to upgrade to the Carvon V2.5 with the 85KV motor, add heatsinks+fans, and I should be good to go for my overheating and braking issues.

My question is, if 149KV is too high for my VESC and Enertion’s motors are 190KV, wouldn’t their motors also have issues with over heating and braking? or does the belt + pulley eliminate this?

83

Oh I forgot you’re using Carvons. Hub motors generally draw more current than belt drives so running a 190kv motor with reduced gearing should be less stressful.

84

Makes sense.

So is what Enertion is saying sound right? That a 149KV hub motor would make my VESC overheat like this?

85

I guess it depends on current draw, but overheating in 5 minutes on flats doesn’t sound right to me. The fact that there’s an overvolt error is peculiar itself. I suspect there’s something more than just an incompatible motor.

86

where do you live? wonder if you tried another un-heatsinked VESC if the issue would persist. It would simplify the discussion w/ Enertion…

87

I live in NYC. I just ordered another VESC to test from DIY. Should be here in a week or so. Enertion is saying everything looks normal, but I’m questioning that given what I’m hearing from everyone here. Especially since Runplayback (I basically duplicated his setup and settings) is getting much better performance. Or it may just be Enertion’s newest crop of VESC’s being optimized to work with Enertion’s setup. That would makes sense too. I wouldn’t expect them to make a VESC with Carvon hubs in mind.

88

VESCs aren’t custom tailored to any specific motor hardware-wise. You configure the software per motor in BLDC tool. I still think it’s something wrong with the battery or VESC.

89

That’s what I thought, but it seems that some VESC’s perform different than others. I imagine the type of hardware used could make a difference in performance? I know some VESC’s have 3 caps and other’s have 2. Maybe the numbers work out to be the same? Not sure what hardware other VESC’s have.

90

Did you run your own motor detection and adjust the settings to reflect your detection settings in BLDC? Vs just plugging in someone else’s values and skipping those detection steps in your setup. Just want to confirm.

91

I like the 3 smaller caps better for compact form and easier to fit, but i still only run a single bigger cap on my 4.7hw VESC’s. It’s not about the # of caps (but more does help marginally) - but really the total capacity of the cap to smooth the power to VESC.

92

Yup, ran the motor detection and plugged in the appropriate settings. With the caps, I figured it didn’t make much of difference as long as the total capacity was equivalent. I’m just not sure what other VESC’s come with.

93

I’m getting the same thing but it then starts randomly doing its own thing. Is this related? It stops after discharging below 90% and runs perfectly thereafter. Help needed.

94

What’s ur set up? Also take a screenshot of your VESC settings.

95

How do I get the vesc settings?

Enertion trucks, pro drive+ motor, space cell pro 4 and Enertion Vesc ( recent batch)

96

Have you done your motor detection on your VESC? Once you’re on your main BLDC tool screen, take a screenshot.

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How do I connect? Is there a cable?

98

Have you read through this thread?

99

our vesc do have some preinstalled settings for r-spec motors, it saves our customers some stuffing around when they get their kits… also prevents some of the silly mistakes that can occur during the initial bench testing / setup phase…

here are some more things to try…

  • Turn down the motor regen current, get it as close to the battery regen current as possible whilst still having some suitable brake force. (maybe -18 to -20)
  • Bypass the BMS for discharge, if the problem still occurs it might be BMS related.
  • Try a new VESC, do you have VESC platinum? if so email [email protected] and we will send a new one.
  • Try some other motors, maybe a belt drive and see if problem remains.
100

Thanks for the input!

I updated all my VESC settings to match up with my system. Consulted Carvon and Runplayback. I turned down my brake regen and it doesn’t work unless I’m under -10. When my battery gets under 90% charge braking works fine. It’s just when it’s over 90%.

I have a new VESC and another motor on order. Enertion support suggested I try Carvon V2.5 with the lower KV and that should solve my problem. I should have both of them in within the next week or so. Then I can swap parts and narrow down what part is causing my issue.

How do I bypass the BMS of discharge?

Thanks!

101

Thanks mate. I’ll give it a go.

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