We now have a new project that wants to drive a DC brushed motor. The rated voltage of the motor is 75V, and the rated current is 1.6A.
Is there a corresponding drive on this side of TI to recommend it?
The solution of the separation element, the H-bridge
Brian-
We aren't totally committed, but we are pretty invested at this point. Is there any data I can collect that might help you troubleshoot this problem?
Are there other benefits to moving to the DRV10975? Efficiency, etc? I really don't want to move to a new part right before we move in to production, but if this is going to be an issue moving forward and there are other compelling reasons to move to this new part, it may be worth it.
Right now my workaround is to both dither around a set point and increment duty cycle if a lock is received (interrupt input). Duty cycle has to increase by 3% (from 82 to 85) to get out of the false lock region. Certainly seems like a lot given the documentation.
Rapid feedback/help appreciated.
-Chris
Hello everybody,
I am working on a new BLDC motor project and need some help picking EV boards to get started. I cannot share too much besides some general info due to the NDA.
Project is automotive, 12V BLDC motor and controller design.
Could somebody from TI contact me and help me getting started before I buy all the EV boards available?
Thanks,
JB
Rick san
Thank you for your reply!
We will check it with your suggestion.
Kind regards,
Hirotaka Matsumoto
Part Number: DRV8711
Hi all
Would you mind if we ask DRV8711?
We would like to confirm Predriver Fault(XPDF) Indexer mode and PWM mode.
<PWM mode>
In PWM mode, if excessive current is detected on the gate drive outputs (which would be indicative of a failed/shorted output FET or PCB fault),
->Acoording to short between XOUT1(or XOUT2) and GND, we guess that it is possible to confirm.
<Indexer mode>
The datasheet shows "When in indexer mode, both H-bridges are disabled, the xPDF bit in the STATUS register is set, and the FAULTn pin is driven low."
As the condition of occurence, is it the same as PWM mode? short between XOUT1(or XOUT2) and GND??
Kind regards,
Hirotaka Matsumoto
Hi Jan,
This thread will be closed per your request.
Hello Eric,
I have the same problem OS is WIN10 64-bit. I have the same error messages if I want to write parameters to the DRV10987 EEPROM.
I have a error message if I start the GUI:
Do you have the same message?
Regards,
Ulf
Hi Cole,
Thank you very much for your helpful response. Wow, I can't believe that I didn't realize that the Pole textbox is editable. Oops. I've updated the number of poles and the GUI calculated RPM is now correct. However, using the equation you provided, which is what I was using previously, is giving me a different RPM output than what's displayed. (60*177.1)/4 = 2656.5RPM. 2577.32RPM is actually correct based on my flow rate testing.
Hi Ulf:
No, this should need to install "LVRTE2014f2std.exe" file from http://www.ni.com/download/labview-run-time-engine-2014/4887/en/
Hi Eric,
I had installed the "LVRTE2014f2std.exe" and also I rebooted the PC before using the GUI.
I have looked with my scope on the I²C clock and data line everything seem to be normal.
Regards,
Ulf
Part Number: DRV8307
Hello,
I am testing the BLDC motor part no. B773DA3C428D using DRV8307. Its working fine at all duty cycles above around 10%. But at Lower than 10%, it is failed to work. I am not able to understand the issue. PWM frequency was 20KHz. I also tried to increase the PWM frequency so as to check whether there is any minimum Ton required for the IC, but it still shows the same behaviour of not being able to work below 10%. Please guide me to solve this issue. We need this driver to get operated from 0% to 100% with 12-bit resolution i.e. 4096 steps(which is maximum bits available in IC).
Part Number: DRV595EVM
Hi team,
The customer has 4 DRV595EVM boards. He uses 4 different input voltages, there are 4 different output voltages.
All EVM boards are default setting. Please check the attach for the test result.
The customer thinks only EVM4 is fine. And the red line test values are incorrect.
For the EVM1, when +IN=3.3V/IN=3.3V, it should output 0V. But the test result is 10.63V.
When +IN=0V/-IN=3.3V, it should output -10.63V. But there is no output for the test reslut.
For the EVM2, when +IN=3.3V/IN=3.3V, it should output 0V. But the test result is 10.63V.
For the EVM3, when +IN=3.3V/IN=3.3V, it should output 0V. But the test result is 10.63V and it is the positive output.
Are the customer's test results and the opinions correct? Would you provide some suggestion for the customer's tests.
Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments
Part Number: DRV10987EVM
Hi,
May I know where can download DRV10987 EVM GUI parameter file?
Thanks.
Regards,
Eric