topic Re: BLDC PMF problem in S12 / MagniV Microcontrollers

BLDC PMF problem

bskim — Tue, 26 Apr 2022 08:00:23 GMT

hello everyone

im using MCU 12zvmc256 model

i made 3 controller boards to control BLDC motor

tried operating one board and confirmed that the trapezoidal back-emp appears normally.

However, in the other boards of the same circuit, PMF V High gate not Output.

Also, the AMP[0](Current Sensing) ADC Voltage fluctuates by 500mV. IS The MCU bad?

danielmartynek — Wed, 27 Apr 2022 08:11:10 GMT

Hello @bskim,

Do you see any GDU or PMF error flags?

GDU Flag Register (GDUF)

GDU Desaturation Error Flag Register (GDUDSE)

PMF Fault Enable Register (PMFFEN)

PMF Fault Interrupt Flag Register (PMFFIF)

Table below lists GDU faults and the corresponding action on the drivers.

Regards,

Daniel