6.2.26.4.1.2 Motor de-excitation time in encoderless speed-controlled operation (ASCL)
The modulation is not switched off in closed-loop operation (ASCL), but the flux is
reduced by the control. The value to which the flux is to be lowered is calculated
depending on the actual speed:
• Actual speed <= 5% rated speed => The flux must not be reduced, set flux =
100% rated flux
• Actual speed >= rated motor speed => The flux is reduced to 20% of the rated
flux
The set flux is linearly interpolated between these two speed points.