TMS320F280025C: Motor control SDK general project and laboratory level 4 incremental build project

Sorry,I have one more question.

Q3:According to section 2.2.4 of the Motor Control SDK General Project and Lab User Guide,it required me to add a 47nF capacitor to the C9, C10, and C11 to support InstaSPIN-FOC.I have connected 47nF 16V capacitor as required, can I supply 24v to drv8323?

Kind regards,

johnny

Hi Johnny,

Q1: The 220V AC should not be directly connected to the DRV8323RH (maximum supply voltage of 65V DC), this is a typo and will be fixed in an upcoming release. Section 3.2.9 of the Universal Motor Control Project and Lab User's Guide says "Connect a supply voltage ranging from 6 to 40 V from a battery or a DC voltage source to the voltage supply pins as shown in Figure 3-10. The maximum supply voltage rating for the BOOSTXL-DRV8323RH is 65V, so care must be taken to ensure that the voltage does not exceed this value during operation."

Q2: Can you clarify what you mean here? This value is set within the sys_main.c file.

Q3: I am communicating with the proper expert to answer this.

Thank you for your patience,

Skyler

Hi Skyler,

Q1:I skipped steps 1-7 of Section 2.5.4.3, modified the relevant parameters of the motor myself, and now started the motor.

Q2;According to the User Guide, Section 2.5.4.3, Step 3, requires me to change the value of userParams.flag_bypassMotorId. I didn't find it yesterday, and as explained in Q1, I skipped it, so now there are no problems.

Now I have some problems again. I hope you can help me.

Q4:The above operation I used is F280025C+DRV8323RH, now I want to use F2800157+DRV8323RH, but the official routine does not have this configuration, only F2800157+DRV8323RS routine, May I ask how to modify the driver code now? There are some tutorials in the user manual, but I'm still not sure if there is a more detailed tutorial.

Thank you for your help!

Kind regards,

johnny

Hi Skyler,

Regarding Q4, if there is no tutorial available, can you give me any ideas on how to change the driver code?

Kind regards,

johnny

Hi Johnny,

Q4: There is no guide for switching from DRV8323RS -> DRV8323RH. The UMCL project for F280013x has support for both DRV8323RS and DRV8323RH, so I recommend comparing the differences between the two F280013x configurations and making similar changes to create a DRV8323RH config on F280015x. 

Kind regards,

Skyler

Hi Skyler,

The UMCL project for F28002x has support for both DRV8323RS and DRV8323RH,so I compared the differences between the two F28002x configurations.But their code is very different, I now a little do not know how to do.Do I only need to pay attention to the gpio configuration?

Kind regards,

Johnny

Hi Skyler,

If you encounter this problem, what will you do first and then what will you do? Can you tell me in more detail? Thank you so much!

Kind regards,

Johnny

Hi Johnny,

Based on the difference I see in the DRV8323RH and DRV8323RS projects for F280013x, I would first make sure to copy the proper header and source files from the drv8323 directory to the project (SDK_ROOT/libraries/drvic/drv8323). Then, I would look at the differences defined in the hal.c file that check which DRV is being used. After that, I would continue to compare the differences and see which ones are relevant to the project you are developing.

Kind regards,

Skyler

user6292081 said:

Q3:According to section 2.2.4 of the Motor Control SDK General Project and Lab User Guide,it required me to add a 47nF capacitor to the C9, C10, and C11 to support InstaSPIN-FOC.I have connected 47nF 16V capacitor as required, can I supply 24v to drv8323?

Hi Johnny,

R2, R3, and R4 on the BOOSTXL-DRV8323RS should be enough to drop the voltage low enough for a 16V rated capacitor to handle. 

A good rule of thumb to follow is the capacitor rating should be two times the amount of voltage that is expected. 

Regards,

Yara

Hi Skyler,

I'll try it first.Thank you very much for your help.

Kind regards,

Johnny

Hi Yara,

I don't have a capacitor with a higher rated voltage, I only have a 16v capacitor, so now I only dare to connect a 12v voltage source to drive a small motor.Do you mean that R2, R3, and R4 are sufficient to reduce the 24v voltage to within the range of the 16v capacitor?

Kind regards,

Johnny

OK.Thank you!

Hi Yara,

After receiving your positive reply, I increased the voltage to 24v to drive the 24v motor. But it can't start the motor properly.

My operation is as follows: I load the general motor control code of level4, automatically identify motor parameters through the program, then change the motor parameter value in "user_mtr1.h", and then load the program to start the motor.

The first time it waited a few seconds and it started successfully, but the second time it failed to start.Then I tried a few times, and only succeeded twice and they take longer to start up.

What is the cause of this?

Kind regards,

Johnny

I found that the value of "motorVars_M1.faultMtrNow.all" is not 0 when the motor starts.

Sorry,I solved the problem.