Siemens SINAMICS V20 Series, Руководство по эксплуатации

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Parameter list
7.2 Parameter list
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
181
Parameter Function Range Factory
default Can be
changed Scaling Data
set Data
type Acc.
Level
Note: See P1335.
The starting frequency of the slip compensation is P1334 * P0310.
P1335[0...2] Slip compensation [%] 0.0 - 600.0 0.0 U, T PERCEN
T
DDS Float 2
Parameter dynamically adjusts inverter output frequency so that motor speed is kept constant independent
of motor load.
In the V/f-control, the motor frequency will always be less than the inverter output frequency due to the slip
frequency. For a given output frequency, the motor frequency will drop as load is increased. This behavior,
typical for induction motors, can be compensated using slip compensation. P1335 can be used to enable
and fine-tune the slip compensation.
Dependency: Gain adjustment enables fine-tuning of the actual motor speed (see P1460 - gain speed control).
P1335 > 0, P1336 > 0, P1337 = 0 if P1300 = 5, 6.
Notice: The applied value of the slip compensation (scaled by P1335) is limited by following equation:
f_Slip_comp,max = r0330 * (P1336 / 100)
Note: P1335 = 0 %:
Slip compensation disabled.
P1335 = 50 % - 70 %:
Full slip compensation at cold motor (partial load).
P1335 = 100 % (standard setting for warm stator):
Full slip compensation at warm motor (full load).
P1336[0...2] Slip limit [%] 0 - 600 250 U, T - DDS U16 2
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to frequency setpoint.
Dependency: Slip compensation (P1335) active.
r1337
CO: V/f slip frequency
[%]
- - - PERCEN
T
- Float 3
Displays actual compensated motor slip as [%]. f_slip [Hz] = r1337 [%] * P0310 / 100
Dependency: Slip compensation (P1335) active.
P1338[0...2] Resonance damping
gain V/f
0.00 -
10.00
0.00 U, T - DDS Float 3
Defines resonance damping gain for V/f. The di / dt of the active current will be scaled by P1338. If di / dt
increases the resonance damping circuit decreases the inverter output frequency.
Dependency: This parameter is influenced by automatic calculations defined by P0340.
Note:
The resonance circuit damps oscillations of the active current which frequently occur during no-load
operation. In V/ f modes (see P1300), the resonance damping circuit is active in a range from approx. 6 %
to 80 % of rated motor frequency (P0310). If the value of P1338 is too high, this will cause instability
(forward control effect).
P1340[0...2] Imax controller
proportional gain
0.000 -
0.499
0.030 U, T - DDS Float 3
Proportional gain of the I_max controller.
The Imax controller reduces inverter current if the output current exceeds the maximum motor current
(r0067).
In linear V/f, parabolic V/f, FCC, and programmable V/f modes the I_max controller uses both a frequency
controller (see P1340 and P1341) and a voltage controller (see P1345 and P1346).
The frequency controller seeks to reduce current by limiting the inverter output frequency (to a minimum of
the two times nominal slip frequency).
If this action does not successfully remove the overcurrent condition, the inverter output voltage is reduced
using the I_max voltage controller.
When the overcurrent condition has been removed successfully, frequency limiting is removed using the
ramp-up time set in P1120.