Posted on November 19, 2014 at 17:31I am using a and research
on single shunt FOC
technology of the
Motor Control library V2.0.
Now Ihave some questions to consult.
First , I donot quite understand the function of SVPWM_1ShuntCalcDutyCycles (Volt_Components Stat_Volt_Input) in stm32f10x_svpwm_1shunt.Cthe
subfunction
SVPWM_1PWMDutyAdj ,From Um0492of boundary2 boundary3 . An ST patented technique for current sampling in the �Boundary� regions has been implemented in the firmware .From the preach PPT, I know an ST patented : when unable to sample a phase of the current, by insert a valid in vectorV7 to sample the current and keep a constant .
According to my when the aim vector in the,we need to adjust the not dvDutyValues.hTimePhA, beasuse the dvDutyValues.hTimePhB is the least duty cycle in SECTOR_5 or SECTOR_6,so I have difficulty understanding the lib code. the code about BOUNDARY_2 also confuse.me.
Continue to look at the code ,
if (dvDutyValues.hTimePhA > 0xEFFF) what is the 0XEFF mean and
is how to get this value.
Continue dowm ,about the sample point in this application the tim1 is PWM1 mode in this lib, the first point is Compare match in up count ,the second point occurs in down count, is this understanding correct ?
THANKS
Part oft he lib code
// Adjust the lower
{
switch (bSector)
{
case
case :
bInverted_pwm_new = INVERT_A;
-=HTMIN;
break;
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}
}
dvDutyValues.hTimePhA = DMABURSTMIN_A;
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#motor-control-firmwa-1shunt-foc
