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about sensorless BLDC 6-step control by using MTRCKTSBNZVM128

Question asked by SuBin Kim on May 16, 2018
Latest reply on May 25, 2018 by Matej Pacha

Hi, I want to control my 6-poles(3 pole pairs) BLDC motor using MTRCKTSBNZVM128 SW(BLDC sensorless 6-step app).


MOTOR SPEC : 50W, 6-poles, 9 slots


The problem is that we want to control our motor to maximum upper 6000rpm, but it just rotating 3100rpm now.


I checked the MCU(S12ZVML128) using maximum voltage duty(95%) but the current(max 3.2A) is too low for maximum rpm. So we estimate the current is the main point of this situation. 


I understand that this app SW is designed for EVB board and motor, so it's not optimized for our application now.


Then How can I bring more current for ours? or Do you have any other point of view to solve our problem? 


Please give me your opinions.