Lenze i950

13.6.5.3 ASM
eld controller
For motors with great rotor me constants or small rotor resistances, very high gain factors
are calculated. Since the seng range of the eld controller is limited to the double rated
magnesing current, the eld control loop in the case of these motors tends to a two-point
response when the values calculated are entered.
The automac calculaon is made via the parameter 0x2822:016 = 1.
Starng from a calculated gain factor of approx. 1000 A/Vs, do not set the full value anymore.
Example
Calculated value: 10000 A/Vs
Seng: 3000 A/Vs
Calculaon of the gain
»
× ×
p
r Stromregler
1
V
4 R T
Calculaon of the reset me
= =
r
n r
r
L
T T
R
Parameter Symbol Descripon Dimension unit
0x29C0:001 V
p
Field controller gain A/Vs
0x29C0:002 T
n
Field controller reset me s
0x2C02:002 L
h
Mutual motor inductance (ASM) H
0x2C02:001 R
r
Motor rotor resistance (ASM) Ω
- T
curr
ent controller
Equivalent me constant of the cur-
rent control loop = 0.0005 s
- T
r
Motor rotor me constant
- K
Path
Gain of the control path
- L
r
Motor rotor resistance (ASM) H
Parameter
Address Name / seng range / [default seng] Info
0x29C0:001 Field controller sengs: Gain
0.00 ... [165.84] ... 50000.00
A/Vs
Gain factor Vp of the eld controller.
0x29C0:002 Field controller sengs: Reset me
1.0 ... [15.1] ... 6000.0 ms
Reset me Tn of the eld controller.
Conguring the motor control
Opons for opmising the control loops
Mot
or control sengs
269