Lenze i950

Distribuon of the grid points
•
The saturaon
characterisc is represented by 17 grid points.
•
The 17 grid points are spaced on the X axis at equal intervals (equidistantly) in a range of
0 ... 100 %. The 100% value of the X axis refers to the current value (max. motor current in
the process) set in parameter 0x2C05.
•
The y values for the grid points can be accessed via the subindices of parameter .
0 6.25 12.5 18.75 25 31.25 37.5 43.75 50 56.25 62.5 68.75 75 81.25 87.5 93.75 100
I
max
Vp [V/A]
Tn [ms]
[%]
x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16 x17x1
•
The 100 % v
alue of a grid point refers to
•
the set motor stator leakage inductance 0x2C01:003 and
•
the set current controller gain V
p
0x2942:001.
•
Preferably select a display area of the grid points which includes at least the ulmate
motor current. The current controller step response is then recorded acvely only unl the
grid poin
t with peak motor current. In order to prevent the motor winding from being
overloaded, use the manual test mode "current pulse" for recording: 4Manual "current
pulse" test mode. ^ 305
•
The grid points with current setpoints above the peak motor current are determined
through interpolaon.
•
When the saturaon characteriscs for motor types are determined, it makes sense in
some cases to select a scaled representaon of the grid point distribuon. This requires to
know the highest value of the quoent from "ulmate motor current / rated motor cur-
rent" of the motor series.
Example of determining the saturaon characterisc
Given values:
•
Ra
ted motor current: 5 A
•
Maximum motor current: 20 A
•
Maximum process current: 15 A
Conguring the motor control
Fine adjus
tment of the motor model
Correcon of the stator leakage inductance (Lss)...
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