DRV3205-Q1: Current Sense Problem

Betul,

Let me check on this with the team and I will get back to you by Thursday this week.

Regards,

-Adam

Thank you Adam. I'll wait for your reply.

Hello Adam,
Did you check the situation , Is there any progress?
Thank You+

Betul,

We are still working on this, please give us some more time.

Regards,

-Adam

Hello Adam,
Can you find any solution?
Thank you.

Hello Adam,
I was wondering if you can share an example code for the current sense function?  Because weget some values while measuring the current but in some cases torque increases but the value that we measure is discreasing. We can't see the logic there. When you look our design you can see there's no difference from the evaluation board so we think maybe we're doing something wrong on the software part. 
If you need further information, you can ask me or we can have a webcall. Please keep me update.
Thank you. 

Betul,

I don't have example code for this unfortunately. I am still looking into this on our side.

Regards,

-Adam

betul yurddas said:

But we have some issues about current sensing. We can read the datas but they’re not true and robust.

Can you provide more info on this, such as amplifier gain and the signal waveform of (IPx - INx) and Ox to see the relationship and any non-linearity?

Brian

Betul,

Brian's request may also help here, do you have data that you can share showing the issue?

Regards,

-Adam

Hello Brian & Adam,
The amplifier gain was as default value at first then ve tried to change it to higher values. We connect the Ox outputs to analog inputs of RM57 Launchpad. But actually the problem is that; the current we read from analog input when there's no load attached to the motor is higher than the current value that we read with load attached. The value that the PSU show isso much higher than values that we read from analog input in both situation. Doesn't it need to show higher values when there's load on the motor?

I hope it's enough because my colleague is not at the company for few days so I can't send you any picture or report right now. But in few days I can send you some information about our code and pcb or anything you need.

Thank  You & Best Regards

Betul,

We will need the additional information to make a recommendation here. Please share scope image as requested above in the load and no load conditions. We also would like the schematic to review.

Regards,

-Adam

Hello Adam,
We'd like to record a video of our test unit. And I'll send it to you with test report and schematic. But can I get an e mail adress? Because of its our R&D project, I can't share it on forum. 
Thank You & Best Regards

Betul,

I will send it to you in a private message on the forum.

Regards,

-Adam

Hello Adam,
I sent you an e mailof documments that you asked for. Did you receive it? Is there any progress?
Thank You & Best Regards

Betul,

Sorry we had a lot of team members out this week because of holidays. I will review this next week and comment.

Regards,

-Adam

Hello Adam,

We're in a really bad situation for our project right now. Can you please check again if there's any progress?

Tank You & Best Regards

Betul,

Let me check again and I will get back to you tomorrow.

Regards,

-Adam

Betul,

I have responded to your email, please check there.

Regards,

-Adam

Hello Adam,

I answered the questions that you asked on e mail.

Thank You & Best Regards

Betul,

I am closing this thread for now as we are communicating over email.

Regards,

-Adam