Rockwell Automation SA3100 Distributed Power System Drv Config,Program User Manual
Page 154
Commissioning Procedure for Non-Constant Power Algorithim Operation
J-7
It is necessary to recalculate all algorithm coefficients and variables based on motor
nameplate data and the above three parameters.
The equation set which allows this to be accomplished is shown below:
NOTES: In some cases, the approximation from the PMI tune function for the
STATOR_IZ_E1% value causes the flux loop to go into saturation. This condition can
be recognized if the tune abort warning occurs immediately upon asserting the tune iz
bit when at the first speed point. To compensate for this condition, the operator can
observe the Flux Reference and Flux Feedback signals via the power module meter
ports. The digitized value for the fourth port is available to a register (219 / 1219 -
SEL_VAR%). The value of STATOR_IZ_E1% can be modified online until the
reference and feedback are approximately equal. When the two signals are
approximately equal, the value of “Id current reference counts” (observed via the
power module meter ports) should be changing. When this state is acheived, the
commissioning procedure may continue.
I
d_rtd
= 2 I
z_rtd
I
q_rtd
=
2
R
st_0
=
R
st_rtd
.
.
I
2
st_rtd
(RPM
synch
- RPM
rtd
)
551 HP
rtd
L
m 0
=
I
2
d_rtd
R
r 0
=
R
r_rtd
=
.
.
RPM
rtd
- I
2
q
_ rtd
Ψ
r_rtd_start
(wb) =
227
HP
rtd
.
V
mot_rtd
.
I
st_rtd
p
.
RPM
rtd
.
Ι
q _ rtd
.
Ψ
r_rtd
I
d_rtd
L*
σ
s 0
= T
st
.
R
st_rtd
L
s 0
= L
r 0
= L
m 0
+ L*
σ
s 0