本帖最后由 t2230510 于 2010-12-28 20:58 编辑
if(angle < VECTOR2)
{
angle2 = angle - VECTOR1; // Reference SVM angle to the current
// sector
angle1 = SIXTY_DEG - angle2; // Calculate second angle referenced to
// sector
t1 = sinetable[(unsigned char)(angle1 >> 6)]; // Look up values from
// table.
t2 = sinetable[(unsigned char)(angle2 >> 6)];
// Scale t1 to by the volts variable.
t1 = ((long)t1*(long)volts) >> 15;
// Scale t1 for the duty cycle range.
t1 = ((long)t1*(long)tpwm) >> 15;
// Scale t2 time
t2 = ((long)t2*(long)volts) >> 15;
t2 = ((long)t2*(long)tpwm) >> 15;
half_t0 = (tpwm - t1 - t2) >> 1; // Calculate half_t0 null time from / period and t1,t2
// Calculate duty cycles for Sector 1 (0 - 59 degrees)
PDC1 = t1 + t2 + half_t0;
PDC2 = t2 + half_t0;
PDC3 = half_t0;
}
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