5 Parameter
BU 0180 en-4118
105
P216
Time boost precontrol
(Time boost precontrol)
S
P
0.0 ... 10.0 sec
{ 0.0 }
This parameter is used for 3 functionalities
Time limit
for the
boost lead
:
Application time for increased starting current.
Only with linear characteristic curve (P211 = 0% and P212 = 0%).
Time limit
for
suppression of
pulse
switch-off
(P537): enables start-up under heavy load.
Time limit
for
suppression
of
switch-off on error
in parameter (P401), setting { 05 } "0 - 10V with
switch-off on error 2"
P217
Oscillation damping
(Oscillation damping)
S
P
0 ... 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 ± 0.045 Hz are switched in. At 400 % in P217,
this corresponds to ± 1.8 Hz
The function is not active in “Servo mode, P300”.
P218
Modulation depth
(Modulation depth)
S
50 ... 110 %
{ 100 }
e
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.
P219
Automatic flux optimisation
(Automatic flux optimisation)
S
25 ... 100 % / 101
{ 100 }
With this parameter, the magnetic flux of the motor can be automatically matched to the motor load,
so that the energy consumption is reduced to the amount which is actually required. 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 s. 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.
This parameter does not function for the operation of synchronous motors (IE4 motors).
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)
Summary of Contents for SK 180E Series
Page 1: ...BU 0180 en NORDAC BASE SK 180E SK 190E Users Manual for Frequency Inverters...
Page 4: ...NORDAC BASE SK 180E SK 190E Users Manual for Frequency Inverters 4 BU 0180 en 4118...
Page 185: ...8 Additional information BU 0180 en 4118 185 8 3 4 EU Declaration of Conformity...
Page 211: ...Key word index BU 0180 en 4118 211...
Page 212: ...6071802 4118...
