Parameter Description | Issue 01/06 |
3.29.1.3Imax controller
P1340[3] Imax freq. controller prop. gain |
| Min: | 0.000 | ||
CStat: | CUT | Datatype: Float | Unit: - | Def: | 0.000 |
CONTROL | Active: Immediately | QuickComm.: No | Max: | 0.499 |
Proportional gain of the I_max frequency controller.
Level
3
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 parameters P1340 and P1341) and a voltage controller (see parameters 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
Motor current r0067
Imax | t | |
A0501 | ||
r0056 Bit13 1 | ||
| ||
0 | t |
f
t
In linear V/f for textiles, FCC for textiles, or external V/f modes only the I_max voltage controller is used to reduce current (See parameters P1345 and P1346).
Index:
P1340[0] : 1st. Drive data set (DDS)
P1340[1] : 2nd. Drive data set (DDS)
P1340[2] : 3rd. Drive data set (DDS)
Note:
The I_max controller can be disabled by setting the frequency controller integral time P1341 to zero. This disables both the frequency and voltage controllers. Note that when disabled, the I_max controller will take no action to reduce current but overcurrent warnings will still be generated, and the Drive will trip in excessive overcurrent or overload conditions.
P1341[3] Imax freq. ctrl. integral time |
| Min: | 0.000 | Level | |||
| CStat: | CUT | Datatype: Float | Unit: s | Def: | 0.300 | 3 |
|
| ||||||
| CONTROL | Active: Immediately | QuickComm.: No | Max: | 50.000 |
|
Integral time constant of the I_max controller.
P1341 = 0 :
I_max frequency and voltage controllers disabled
P1340 = 0 and P1341 > 0 :
frequency controller enhanced integral
P1340 > 0 and P1341 > 0 : frequency controller normal PI control
See description in parameter P1340 for further information.
Index:
P1341[0] : 1st. Drive data set (DDS)
P1341[1] : 2nd. Drive data set (DDS)
P1341[2] : 3rd. Drive data set (DDS)
164 | MICROMASTER 440 Parameter List |