Description of the Software Modules and Parameters
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
469
3
47.2
Isd set value
Display of the limited Isd set value which is passed directly to the current controller.
47.3
Isq actual value
Display of actual value of Isq.
47.4
Isd actual value
Display of actual value of Isd.
47.5
Isq actual value filtered
Filtered actual value of Isq (time constant = 1.25ms).
47.6
Isd actual value filtered
Filtered actual value of Isd (time constant = 1.25ms).
47.7
Kp q-current controller 4kHz
Proportional gain of the q-current controller at 4 kHz PWM frequency,
Units: V/A
The proportional gain (Kp) of the Iq current controller is set with this parameter. Corre-
spondingly, the reset time (Tn) of the Iq current controller is set with the Tn q-current con-
troller parameter (
). According to the optimum magnitude and taking account of
the internal standardizations, Kp and Tn for the Iq current controller at 4 kHz PWM fre-
quency can be set as follows:
T
n
= L
sq
/ r
s
(ms)
where r
s
= Stator resistance in ohms, cold
k
p
= L
sq
/(3*Tab) = L
sq
/(3*0.125) = 2.667* L
sq
(L
sq
in mH)
For asynchronous motors, the total leakage inductance L
sigma
must be used instead of
L
sq
.