CCS/TMS320F28027F: The limit of acceleration in InstaSpin lab10a

Tool/software: Code Composer Studio

Hi all,

When I try to tune the motor by InstaSpin lab10a for my customer , i meet a problem about the limit of acceleration

Device : TMS320F28027F + DRV8323RH

Motor parameter : BLDC motor , 30krpm , 360W / 24V / 2A (peak current : 15A)

My customer hope that the motor speed could reach 22.7krpm from 8.8krpm in 150ms

after calculations, i set gMotorVars.MaxAccel_krpmps = ((22700 - 8800) / 0.15) = 92666

however , it still cost 200ms to reach the target speed , not 150ms

I have no ideas why the acceleration could only reach 69500 ((22700 - 8800) / 0.2)

Maybe because it use sine wave control , not six step sqaure wave?

here is the wave ( cost 200ms to reach the target speed , peak current = 12.18A ):