NORDAC SK 750E Manual
88 Technical design subject to change BU 0750 GB
Setting value / Description / Notes
With this function it is possible to impress a value for the expected torque requirement on the con-
troller. This is particularly helpful with hoisting gear applications where this feature will enable
more effective load-taking during the starting-up period.
Note: For the magnetic field to rotate clockwise, the torque is entered with a positive
sign if the driving power is exclusively supplied by the motor, and with a nega-
tive sign if the torque is obtained from regenerative operation. If the magnetic
field is to rotate anti-clockwise, the signs of the torque values are used the other
way round.
Only with linear characteristic (P211 = 0% and P212 = 0%).
Drives requiring a high starting torque can be assisted during this period by feeding them a certain
amount of extra current. This is ensured by selecting a percentage which is deemed adequate in
this parameter. The time during which the boost will be available is limited. It is set in parameter
P216 >Time boost derivative action<.
During the interval in which a boost derivative action is effective, any current and torque
current limits set (P112, P536, P537) will be deactivated.
Only with linear characteristic (P211 = 0% and P212 = 0%).
On-period of the boosted starting current.
Parameters defining control / characteristic curves
Vectorial current control (factory settings)
P201 to P209 = motor data
P210 = 100%
P211 = 100%
P212 = 100%
P213 = 100%
P214 = 0%
P215 = not relevant
P216 = not relevant
Linear v/f characteristic
P201 to P209 = motor data
P210 = 100% (static boost)
P211 = 0%
P212 = 0%
P213 = not relevant
P214 = not relevant
P215 = 0% (dynamic boost)
P216 = 0s (time dyn. boost)
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