Rockwell Automation SA3100 Distributed Power System Drv Config,Program User Manual
Page 152
Commissioning Procedure for Non-Constant Power Algorithim Operation
J-5
Reference Material -
The following information describes step by step processor functions for the new
commissioning procedure.
1.
Calculate the necessary motor parameters and variables initially based on the
following equations: (This represents the action taken when the PMI tune function
is invoked (bit 1 of register 100/1100)).
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
1.
2.
Run the algorithm with the closed flux loop using the flux reference (4) directly in
the final stator flux reference point. Run the drive at the 40% speed point.
The result of this step is obtaining the first iteration of a rated magnetizing current
I
z_rtd_1
by measuring an output of a flux regulator through an averaging procedure
(at least a 1000 scan time sampling interval). Recalculate expression (2), (3), and
(5) - (9) based on new value of the flux producing current I
z_rtd_1.
3.
Disable the flux loop. Set output of a flux regulator. Id_ref =
√2⋅
Ι
z _ rtd _ 1
= I
d _ rtd
_ 1.
Run drive on a synchronous speed with no load condition and make a
measurement of motor voltage through an averaging procedure (at least a 1000
scan time sampling interval). This motor voltage is a rated no load motor voltage
V
NL _ rtd.
I
z_rtd_start
(amps) = 3
.
I
st _ rtd
746 * HP
rtd
V
mot _ rtd
(magnetizing current)
( 1 )
I
d_rtd_start
(amps) = 2
.
I
z _ rtd_start
(flux producing current)
( 2 )
I
q_rtd_start
(amps) = 2
.
I
2
st _ rtd
_
I
2
d _ rtd _ start
(torque producing current)
( 3 )
Ψ
ref_start
(wb) =
0.97
.
2
.
V
mot _ rtd
3
.
2
.
π
.
f
0
(stator flux reference)
( 4 )
R
r0_start
(ohms) = 551 . HP
rtd
. (RPM
synch
- RPM
rtd
)
RPM
rtd
.
I
2
q_rtd_start
R
st0_start
(ohms) = 1.3
.
R
r0_ start
(rotor resistor for the
rated temperature)
(stator resistor for the rated
( 5 )
temperature)
( 6 )
Ψ
r_rtd_start
(wb) =
227
.
HP
rtd
.
V
mot_rtd
.
I
st_rtd
p
.
RPM
rtd
.
Ι
q _ rtd _ start
(rated rotor flux)
( 7 )
L
m0_start
(H) =
Ψ
r_rtd_start
Ι
d _ rtd _ start
(mutual inductance)
( 8 )
L*
σ
s _ start
= 0.05 . L
m0 _ start
(modified leakage inductance) ( 9 )
where:
HP
rtd
- Motor rated horsepower
V
mot_rtd
- Rated motor line - to - line voltage (RMS)
I
st_rtd
- Rated motor phase stator current (RMS)
f
0
- Rated stator frequency (Hz)
p - pole pairs