January 2012 6.16 The Control Loop 931
Feed axis in EcoDyn operation – medium utilization
MP_ampVoltProtection = not installed – mode 3
((8) in the commissioning flow chart)
After you have found the desired acceleration and jerk for the axis concerned,
check the axis load during motion. To do so, reverse the axis up to maximum
feed rate and record the torque current Inoml on the internal oscilloscope. If
the amount of torque current never exceeds approx. 70 % of the maximum
current, there are enough reserves for the magnetizing components—the
setting of MP2160 (=2) is completed. Please note: The maximum current is
the lesser of maximum motor current and maximum power stage current.
Feed axis in EcoDyn operation – high utilization
MP_ampVoltProtection = not installed – mode 3
((9) in the commissioning flow chart)
However, if the torque current is greater than 70 % of the maximum current,
record the actual current Iactl on the internal oscilloscope to check whether it
approaches the maximum current. The actual current contains both the torque
current component as well as the magnetizing current component. If the
amount of actual current never exceeds approx. 90 % of the maximum
current, there are still enough reserves for the magnetizing components—the
setting of MP2160 (=2) is completed here, too.
Feed axis in EcoDyn operation – high utilization
MP_ampVoltProtection = not installed – mode 5
((10) in the commissioning flow chart)
With the entry MP_ampVoltProtection = not installed – mode 5 you can
activate an alternative algorithm for determining magnetizing current. This can
lower the magnetizing current. The total actual current in the field weakening
range falls with it.
Feed axis in EcoDyn operation – high utilization
MP_ampVoltProtection = not installed – mode 5
((11) in the commissioning flow chart)
If you succeed with MP_ampVoltProtection = not installed – mode 5 in
limiting the actual current to less than 90 % of the maximum current at any
time, there are enough reserves again for the magnetizing component—the
setting of MP_ampVoltProtection (=not installed – mode 5) is completed
here.
Feed axis in EcoDyn operation – high utilization
MP2160 = not installed – mode 5
((12) in the commissioning flow chart)
If the actual current stays over 90 % of the maximum current, the load on the
drive can be reduced through a reduction of the acceleration and/or jerk.
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