why GD3000 enters low VLS error status

[Jack_cheng]

I'm testing my own BLDC motor on MCSXTE2BK142 daemon board.  With freemaster runs on PC and MCAT tools could run normally. I MCAT tools enters error status after clicked the ON button. The MCAT shows GD3000 error,as following.

I'm not sure what happens.

My BLDC motor has following parameters,

voltage:DC12V

idle current:0.35A

idle speed:4850 RPM

at rated load:

109 mN.m

current:4.5±15%A

speed:3500±15%

pole-pairs :4

I modified PMSM_appconfig.h file according to my BLDC motor as following,

But the same errors happens  repeatly as above.

Any suggestion is appreciated.

Thanks very much.

I checked the dcb_v_pos voltage ,it's 12.1

[JoaquinL]

Hi Jack,

Low VLS error means the power supply for the gate drives is under voltage. The VLS under voltage threshold is between 7.5 V and 8.5 V. 

Maybe there is something wrong in your HW/SW. Here are some suggestions for you:

• Check your PWM polarity. Note: the high side is low active and low side is high active.

• Increase the deadtime of PWM
• Check you motor control SW/HW

BR, Joaquin

[petervlna]

Hello,
I've talked to application team, once they have time they will have a look at your issue.

Best regards,

Peter