NORD Drivesystems BU0505 - Manual (Page 89)

5 Parameters
BU 0505 GB-1013 89
P216
Time boost prectrl.
(Time boost precontrol)
S P
0.0 ... 10.0 sec
{ 0 }
Only advisable with linear characteristic curve (P211 = 0% and P212 = 0%).
Application time for increased starting current.
NOTE:
With active ISD control (P211 and / or P212 ≠ 0%), parameterisation of P216 ≠ 0
results in incorrect control.
Pos : 137 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P217 – Sc hwing ungs dämpf ung @ 0\ mod_1327590520707_388. doc x @ 8255 @ @ 1
P217
Oscillation damping
(Oscillation damping)
S P
0 ... 400 %
{ 10 }
SW1.6 and above
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”.
Pos : 138 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P218 – M odul ati onsgrad @ 0\ mod_1327590589726_388. doc x @ 8278 @ @ 1
P218
Modulation depth
(Modulation depth)
S
50 ... 110 %
{ 100 }
SW 1.5 and above
This setting influences the maximum possible output voltage of the FI in relation to the mains
voltage. Values <100% reduce the voltage to values below that of the mains voltage if this is
required for motors. Values >100% increase the output voltage to the motor increased the
harmonics in the current, which may cause swinging in some motors.
Normally, 100% should be set.
Pos : 139 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P219 – Aut o.Mag n. anpass ung @ 0\ mod_1327590637383_388.doc x @ 8301 @ @ 1
P219
Auto. magn. adjustment
(Automatic magnetisation adjustment)
S
25 ... 100 % / 101
{ 100 }
SW 1.6 and above
With this parameter, an automatic adjustment of the magnetizing to the motor load can be made.
P219 is a limiting value, to which the field in the motor can be reduced.
As standard, the value is set to 100%, and therefore no reduction is possible. As minimum, 25%
can be set.
The reduction of the field is performed with a time constant of approx. 7.5 sec. On increase of load
the field is built up again with a time constant of approx. 300 ms. The reduction of the field is carried
out so that the magnetisation current and the torque current are approximately equal, so that the
motor is operated with “optimum efficiency”. An increase of the field above the setpoint value is not
intended.
This function is intended for applications in which the required torque only changes slowly (e.g.
pumps and fans). Its effect therefore replaces a quadratic curve, as it adapts the voltage to the
load.
NOTE: This must not be used for lifting or applications where a more rapid build-up of the
torque is required, as otherwise there would be overcurrent switch-offs or inversion of
the motor on sudden changes of load, because the missing field would have be
compensated by a disproportionate torque current.
101 = automatic, with the setting P219=101 an automatic magnetisation current controller is
activated. The ISD controller then operates with a subordinate magnetizing controller,
which improves the slippage calculation, especially at higher loads. The control times
are considerably faster compared to the Normal ISD control (P219 = 100)
Pos : 140 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P2xx – R egel ungs-/ Kennli nien-Paramet er @ 0\ mod_1327590712994_388. doc x @ 8324 @ @ 1