NORD Drivesystems BU0700 User Manual

Page 71

5.1.3 Motor data

BU 0700 GB-1411

Subject to technical alterations

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: