DRV Problem?

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alexmarin99
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Location: Montreal
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DRV Problem?

Postby alexmarin99 » 18 Feb 2016, 22:46

Hello everyone!

I finished soldering the 4.11 PCB today but there was a problem :/
So I powered it with 25V and then it started smoking. D5 smoked and burned.
I changed D5 and retried powering for half a second to check voltage. I checked the 5V voltage and
it gave me around 7V, which is not good because it should be 5V!
I then removed the power and plugged in the STM programmer.
I successfully programmed the microcontroller using the 3.3v from the programmer.
Then the red light started blinking two times.
BLDC Tool successfully connects.
What is the problem? Is it the DRV? What other parts should I change?
What parts could have been damaged from the high voltage?

Thank you!

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 18 Feb 2016, 23:07

I've checked the faults in BLDC tool and it says :
FAULT_CODE_UNDER_VOLTAGE
which is normal because I'm only powering it with the 3.3v from the programmer.

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 19 Feb 2016, 15:20

Can it be the ground of the DRV that is not soldered?
I will try re-soldering it today!

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 19 Feb 2016, 21:03

Ground resoldered!
It now gives me 5V
Microcontroller starts up.
Powered from power suplly.
Another problem:
If I go over 28v from the power supply, the red led
starts flashing 4 times and the terminal gives me this error:
FAULT_CODE_DRV8302.
Any ideas what the problem is?

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 19 Feb 2016, 22:26

Tried powering from 12S batteries,45v in total.
Still doesn't work!

benjamin
Site Admin
Posts: 280
Joined: 15 Dec 2015, 08:38
Location: Sweden
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Re: DRV Problem?

Postby benjamin » 22 Feb 2016, 11:04

Can you run any motor with less than 28V?

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 22 Feb 2016, 16:59

Yes, motor did run in BLDC and FOC if the voltage was less than 28v.
With FOC, there was no torque at all, but I guess this are only settings that need to be changed.
I will re-solder another DRV today!

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 22 Feb 2016, 18:21

DRV changed, it now works with 50V!

Now I have to look at the settings, because there is no torque

alexmarin99
Posts: 15
Joined: 15 Feb 2016, 16:23
Location: Montreal
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Re: DRV Problem?

Postby alexmarin99 » 22 Feb 2016, 18:31

If I press the up button on the keyboard, motor goes fast but no torque.
If I press the right button, motor goes slow but a lot of torque!

Why does it do this?

benjamin
Site Admin
Posts: 280
Joined: 15 Dec 2015, 08:38
Location: Sweden
Contact:

Re: DRV Problem?

Postby benjamin » 22 Feb 2016, 20:14

Nice that it works!

Up/down is current control, right/left is duty cycle control. You can change the keyboard current in the box next to the kb ctrl box.


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