DRV8301-69M-KIT: Hall detection error

Mofu Drives

Part Number: DRV8301-69M-KIT

Hi TI,

We are using projlab11e to start the motor using BLDC mode. When we run the motor in BLDC mode motor start properly but sometimes motor gets locked and motor starts to produce noise (similar to high bandwidth noise) . When we check gHall_State variable in the watch window we are able to see values are toggling. How can we solve this problem.

Thanks

Vivishekh

over 2 years ago

0 Yanming Luo over 2 years ago

TI__Guru** 109730 points

1. Please ensure the sequence of the hall input signal is corresponding to the set number in gHall_PwmIndex[].

2. You may increase PWM frequency if possible because the Hall signal is detected in PWM ISR. The delay time will have an impact on the high-speed running if the PWM frequency is too low.

3. Tune gHall2Fast_Spd_Coef, gHall2Fast_Iq_coef, gHall_speed_FastToBldc_low_pu and gHall_speed_BldcToFast_high_pu.

4. Tune the gains of the PI regulator in HALLBLDC_Ctrl_Run().

You might take a look at the following threads about lab11e

https://e2e.ti.com/support/microcontrollers/c2000/f/171/p/883444/3294852

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/670979

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/883444

https://e2e.ti.com/support/microcontrollers/c2000/f/171/p/822522/3043645