BOOSTXL-DRV8320S: Motor poles on BOOST-DRV832X-EVM

Gonzalo,

I believe the pole value is only used in calculating the RPM shown on the GUI so your motor should still spin correctly yet the RPM will be wrong. 

Unfortunately the original GUI designer didn't include 6 poles as an option.

You can use the 12 pole option and divide it in half to find the correct RPM value.

Regards,

-Adam

Hi Adam, 

Thank you for reply.

Ok, I undestand, the pole number is only to see speed.

I tryed to run in close loop sensored mode, but have issure, on the GUI shows "hall sensor error".

I checked the sensor whit a externar PSU and works well, I see the sensors works on NPN mode. When I connect it on J5connector  BOOST board have 3,3 Vdc in all pins A,B,C !!

Needs I to change any jumper on MCU board to run in sensored mode?

Regards

Gonzalo

Gonzalo,

You should not need to change anything on the MCU board or DRV board.

Can you share the datasheet of your motor? I want to look into the hall sensor operation.

Regards,

-Adam

Hi Adam,

Please find attached motor datasheet.

On the other hand, when setting 12 poles on the "motor pole" at 100% shows 2000 rpm, but the motor nominal value is 3500 rpm.

DB59S024035-A.pdf

Thank you in advance,

Gonzalo

Gonazalo,

How much voltage are you applying to the motor?

How much current can your supply provide?

Do you have a way to check the actual RPM using a tachometer or similar?

Regards,

-Adam

Hi Adam,

I supply the DRV board whit an PSU 24 vdc / 20 Amps.

Yes I check the speed using an motor hall sensor and osciloscope.

Any suggestion about issue sensored control?

Regards 

The maximun speed measured os 2000 rpm.

I tried to change conmutation frecuency whit the same results ......

Regards 

Gonzalo,

Please share your hall sensor oscilloscope waveform.

Are you checking just one hall sensor?

Regards,

-Adam

Hi Adam

Sorry for delay, I'm on a work trip, next week I will send you what you ask.

I have checked all the channels of the hall effect sensors and they all work in NPN. 

Why does the engine not reach its nominal speed?

Regards 

Gonzalo