HEIDENHAIN TNC 426 PB - Page 799

December 2001 Commissioning 6 – 469
n Axis power module with 50 A, PWM frequency of 4 kHz, X1 = 40 %, X2 = 4 kHz
n Spindle power module with 50 A, PWM frequency of 4 kHz, X1 = 40 %, X2
= 3.2 kHz
7
77
7 Reduce the rated current values I
N
of your power modules in the list of
power modules.
or
7
77
7 Reduce the reference value for the I
2
t monitoring.
X
R
[%] 100
100 40–()8 kHz 4 kHz–()⋅
8 kHz 4 kHz–
--------------------------------------------------------------------------------------- 4 0+
èø
æö
– 0 %==
X
B
1
0
100
-----------
– 1.00==
X
R
[%] 100
100 40–()8 kHz 4 kHz–()⋅
8 kHz 3.2 kHz–
---------------------------------------------------------------------------------------- 4 0+
èø
æö
– 10 %==
X
B
1
10
100
-----------
– 0.90==
I
Nnew
I
N
100 % X
R
[%]–()⋅=
MP230x X
B
=
Note
A reduction of the rated current of the power module can cause a reduction
of the rated torque and the rated power of the motor, if equal values for
rated current of the power module and the rated current of the motor were
chosen.