DRV8301-69M-KIT: motorware lab11e, positive directions are different between BLDC and FAST

alexen

Intellectual 270 points

Part Number: DRV8301-69M-KIT

I find if I use BLDC(hall sensor), the positive direction is clockwise. And I cannot control its speed.

if I use FAST, the positive direction is counter-clockwise. And I can control the speed correctly.

over 5 years ago

0 Yanming Luo over 5 years ago

TI__Guru** 109810 points

You mean the sign of feedback speed is different, you could switch the connection sequence of hall sensor, or motor phase line sequence. What target speed is the motor when you met this question?

0 alexen over 5 years ago in reply to Yanming Luo

Intellectual 270 points

The absolute value of speed_pu is always 0.06. And I cannot change it by gMotorVars.SpeedRef_krpm.

0 Yanming Luo over 5 years ago in reply to alexen

TI__Guru** 109810 points

Could you please have more information, like the setting for control mode, switch speed..as below?
gHall_Flag_EnableStartup, gHall_Flag_CurrentCtrl, gHall_speed_FastToBldc_low_pu and gHall_speed_BldcToFast_high_pu

And what the value of gHall_Flag_EnableBldc, speed_est_pu and gHall_speed_fdb_pu do you look during running?

0 Yanming Luo over 5 years ago in reply to Yanming Luo

TI__Guru** 109810 points

Just wanted to check in and see if there is any update from your side, I haven’t heard from you for two weeks, so I’m assuming you were able to resolve your issue. Please let me know if you have any questions. We would like to close this thread if no any further questions. Thanks.

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DRV8301-69M-KIT: motorware lab11e, positive directions are different between BLDC and FAST