July 2013 6.8 The control loop 889
Synchronous spindle/torque motor (MP2160 = 1) ((13) in the
commissioning flow chart)
When you have set the desired ramp gradient (and rounding arc, if required)
for the respective drive, test if the motor accelerates to the required final
speed with a steady increase in acceleration. "Steady increase in acceleration"
means that there are no drops in the acceleration curve. The actual
acceleration usually declines with increasing speed, however.
Synchronous spindle/torque motor (MP2160 = 1) ((14) in the
commissioning flow chart)
Drops in the acceleration curve indicate an excessive magnetizing-current
consumption. You can see this if it exceeds 90 % of the maximum current of
the drive. You can display the magnetizing current on the internal oscilloscope
of the control.
Synchronous spindle/torque motor (MP2160 = 9) ((15) in the
commissioning flow chart)
If the maximum current is limited by the power module (Imax of power
module << Imax of motor) it can make sense to use a more powerful power
module. As an alternative, you can use MP2160 = 9 to activate an algorithm
for reducing the magnetizing current.
Synchronous spindle/torque motor (MP2160 = 9) ((16) in the
commissioning flow chart)
If you succeed with MP2160 = 9 (or by installing a stronger power module) in
attaining a continuous actual acceleration to the final shaft speed, there are
enough reserves again for the magnetizing component—the setting of
MP2160 (=9) is completed here.
The EcoDyn synchronous motors from HEIDENHAIN are operated with
limited field weakening. No voltage protection module is necessary here.
Select from the motor table the motors with the designation QSY1xxx EcoDyn
or QSY1xxx EcoDyn EnDat for MP2200.x.
MP2160.x Field weakening for synchronous motors
Input: 0: No weakened-field operation
1: Weakened-field operation permitted (check if a voltage
protection module is necessary)
2: Operation of a HEIDENHAIN EcoDyn motor
9: Weakened-field operation permitted, alternative to 1
10: Feed axis in EcoDyn mode, alternative to 2
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