NORD Drivesystems BU0700 - Manual (Page 71)

5.1.3 Motor data
BU 0700 GB-1411 Subject to technical alterations 71
Parameter Setting value / Description / Note Available with option
P215 (P) Boost precontrol always visible
0 ... 200 %
[ 0 ]
Only use with linear characteristic curve (P211 = 0% and P212 = 0%).
With active ISD control (P211 und P212 ≠ 0) this parameter (P215) must remain as "0" in order to
prevent a negative influence on the ISD control.
For drives that require a high starting torque, this parameter provides an option for switching in an
additional current during the start phase. The application time is limited and can be selected at
parameter >Time boost precontrol< P216.
All current and torque current limits which may have been set (P112, P536, P537) are deactivated
during the boost lead time.
P216 (P) Time boost precontrol always visible
0.0 ... 10.0 s
[ 0 ]
Only with linear characteristic curve (P211 = 0% and P212 = 0%).
Application time for increased starting current.
P217 Oscillation damping always visible
10 ... 400 %
[ 10 ]
With the oscillation damping, idling current harmonics can be damped. Parameter 217 is a measure of
the damping power.
For oscillation damping the oscillation component is filtered out of the torque current by means of a
high pass filter. This is amplified by P217, inverted and switched to the output frequency.
The limit for the value switched is also proportional to P217. The time constant for the high pass filter
depends on P213. For higher values of P213 the time constant is lower.
With a set value of 10% for P217, a maximum of ± 0.045Hz are switched in. At 400% in P217, this
corresponds to ± 1.8Hz
The
function is not active in “Servo mode, P300”.
P218 Modulation depth always visible
50 ... 110 %
[ 100 ]
The modulation depth can be changed between 50% and 110%. Values under 100% limit the voltage
at the motor to smaller values than the mains voltage. This is not feasible for typical applications with
three-phase asynchronous motors.
Values greater than 100% increase the voltage available at the output, but also the current harmonics,
which can lead to oscillation in some motors.
P2xx
P211
P210
P204
P201
P216
P215
Output
voltage
Output frequency
Time
Note: "Typical" setting for the: