13.6.5.4
ASM field weakening controller
Since the controlled system gain changes with the speed, the field weakening controller is cor-
rected via the speed.
The automatic calculation is made via the parameter 0x2822:017 = 1.
Calculation of the gain
p
=
= ×
×
p
Strecke _Fs
eck
2
V
0,
V
p n
60
Calculation of the reset time
(
)
+
= ×
×
+
= =
»
Strecke _Fs
h
ss
r
n
EF
Filter
EF
r
r
r
V
L
L
L
T
4
T
T
,
T
T
60
R
R
Parameter
Symbol
Description
Dimension unit
V
p
Gain of the field weakening control-
ler
Vs / A
-
V
Path_Fs
Gain of the control path
-
P
Number of pole pairs
rpm
-
n
transition
Speed at which the field weakening
is approximately initiated.
T
n
Reset time of the field weakening
controller
s
-
T
EF
Filter time constant of the field
control loop
T
Filter
Filter time constant for the
required voltage
s
-
T
r
Motor rotor time constant
-
L
r
Motor rotor resistance (ASM)
L
h
Mutual motor inductance (ASM)
H
L
ss
Motor stator leakage inductance
(ASM) or motor leakage inductance
(SM)
H
R
r
Motor rotor resistance
Ω
Parameter
Address
Name / setting range / [default setting]
Info
0x29E0:001
Field weakening controller settings: Gain (ASM)
0.000 ... [0.000] ... 2147483.647 Vs/V
Gain factor Vp of the field weakening controller.
0x29E0:002
Field weakening controller settings: Reset time (ASM)
1.0 ... [2000.0] ... 240000.0 ms
Reset time Tn of the field weakening controller.
0x29E1
Field weakening controller Field limitation
5.00 ... [100.00] ... 100.00 %
Field limitation of the field weakening controller.
13.6.5.5
ASM field weakening controller (extended)
For a quick commissioning, the calculations and settings are made automatically during the
optimisation.
Parameter
Address
Name / setting range / [default setting]
Info
0x29E2
DC-bus filter time
1.0 ... [25.0] ... 1000.0 ms
Filter time for the current DC-bus voltage used for field weakening.
0x29E3
Motor voltage filter time
1.0 ... [25.0] ... 1000.0 ms
Filter time for the current motor voltage used for field weakening.
0x29E4
Voltage reserve range
1 ... [5] ... 20 %
Voltage reserve at the transition point to the field weakening, with refer-
ence to the current value of the DC-bus voltage.
Only relevant for:
•
Servoregelung (SC-PSM) (
= 1)
•
Servo control (SC ASM) (
= 2)
Configuring the motor control
Options for optimising the control loops
Motor control settings
270
Summary of Contents for i950 Series
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