Lenze i950 Series, Руководство пользователя

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Distribution of the grid points
•
The saturation characteristic 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 x17 x1
•
The 100 % value 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 ultimate
motor current. The current controller step response is then recorded actively only until the
grid point with peak motor current. In order to prevent the motor winding from being
overloaded, use the manual test mode "current pulse" for recording:
4
Manual "current
pulse" test mode .
^
305
•
The grid points with current setpoints above the peak motor current are determined
through interpolation.
•
When the saturation characteristics for motor types are determined, it makes sense in
some cases to select a scaled representation of the grid point distribution. This requires to
know the highest value of the quotient from "ultimate motor current / rated motor cur-
rent" of the motor series.
Example of determining the saturation characteristic
Given values:
•
Rated motor current: 5 A
•
Maximum motor current: 20 A
•
Maximum process current: 15 A
Configuring the motor control
Fine adjustment of the motor model
Correction of the stator leakage inductance (Lss)...
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