DRV8302 Magic Smoke

Report your hardware problems here. Include as many details as possible with pictures to get the best possible help and feedback.
RSR
Posts: 10
Joined: 08 Mar 2016, 16:58
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby RSR » 07 Aug 2016, 13:43

Nichicon UHE1J561MHD -- a general purpose capacitor with reasonably low impedance

(but if I should order new with even lower impedance, then I would consider Rubycon 63ZLJ680MG412.5X35)

RSR
Posts: 10
Joined: 08 Mar 2016, 16:58
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby RSR » 07 Aug 2016, 14:54


rew
Posts: 943
Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby rew » 07 Aug 2016, 20:40

Yeah, but with a guaranteed output current of 30mA, there is usually a "current limit" in the regulator, set for nominally 1.5 times that current. This should imho prevent the track from blowing up.....

I think the "rough estimate" is accurate to about 10%. The differences from the calcuated values come from the DRV's internal use and leakage in the mosfet gates. That leakage is "zero" to the closest approximation....

IceNine
Posts: 5
Joined: 24 Aug 2016, 15:13
Location: USA Southeast
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby IceNine » 24 Aug 2016, 19:52

Sorry to necro-post but I just burned up my Enertion VESC 4.10 in exactly the same way while configuring FOC on 12s. I have already ordered a replacement DRV8302 and capacitors for the C18 mod. Is there anything else that is likely to be burned out? The chip burned the instant I hit the throttle so there was little to no heat involved other than the brief melting of the DRV8302.

Also, should I switch my batteries from series to parallel and go 6s or would this simply require higher amperage and cause the same issue?

rew
Posts: 943
Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby rew » 25 Aug 2016, 21:56

Lower voltage means a lower max speed. If you max speed is adequate at 6S then by all means go for 6S....

(If you would change the gearing for 6s to get back that higher top speed, then the required AMPs for the same power would go up and you'd have to check if that stays within range. But I don't think you're planning on that. )

IceNine
Posts: 5
Joined: 24 Aug 2016, 15:13
Location: USA Southeast
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby IceNine » 26 Aug 2016, 18:13


rew
Posts: 943
Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby rew » 27 Aug 2016, 05:02

Torque is directly proportional to current. If what you have now is adequate, then that's not going to change when you lower the voltage. Current is limited by what you enter in the software. (and if you enter too high numbers then you'll blow things up).

In the old days, a 12V, 12W motor would have a resistor builtin that would limit the current to its max current of 1A under (close to) worst-case conditions (i.e. a 12 Ohm resistance). Of course they build that resistance with the wire of the motor. Nowadays, my 50V, 50A motor has a resistance of 0.014 Ohm. so that would be 3.5kA at 50V, and 180kW max power... It is the motor controller that is tasked with a 50A current limit to keep things in one piece...

vyckakk
Posts: 5
Joined: 20 Oct 2016, 10:44
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby vyckakk » 04 Jan 2017, 15:09

Hello, I burned drv8302 on my vesc 4.11 . I tested motor without load with FOC and after 5 min. it burned. What problem it is with this FOC mode? I am using 12S batteries and 4000KW motor.

rew
Posts: 943
Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby rew » 05 Jan 2017, 08:04

The vesc is not suited to run half a train. 4000kW is just below half the motor power of a French high speed train (8800kW).

[edit] Looking for a link to back up my claim of the 8800kW, I found: http://www.khurramhashmi.org/crbasic_in ... s-ICE.html A German ICE has less power under the hood: 2x4800kW.

arvidb
Posts: 234
Joined: 26 Dec 2015, 14:38
Location: Sweden, Stockholm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: DRV8302 Magic Smoke

Postby arvidb » 05 Jan 2017, 10:46



[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Return to “Hardware Problems”

Who is online

Users browsing this forum: No registered users and 1 guest