MICROMASTER 440 - Siemens AS
MICROMASTER 440 - Siemens AS
MICROMASTER 440 - Siemens AS
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6 Commissioning Issue 10/06<br />
P1750 = ...<br />
Control word of motor model<br />
1<br />
This parameter controls the operation of the sensorless vector control (SLVC) at very low<br />
frequencies. This therefore includes the following conditions:<br />
Bit00 Start SLVC open loop<br />
0 NO 1 YES<br />
(Operation directly after an ON command)<br />
Bit01 Zero crossing SLVC open loop 0 NO 1 YES<br />
(zero crossing)<br />
f<br />
Start<br />
f<br />
Zero crossing<br />
Closed loop<br />
Closed loop<br />
p1755<br />
p1755<br />
Open loop<br />
Open loop<br />
t<br />
t<br />
p1755<br />
P1755 = ...<br />
For most applications the setting of parameter p1750 = 0 gives the best result at low<br />
frequency.<br />
Start-freq. motor model (SLVC)<br />
5.0 Hz<br />
Enter the start frequency of sensorless vector control (SLVC), thereby SLVC switches over<br />
from open-loop to closed-loop at that frequency.<br />
r0062<br />
Precontrol<br />
Torque<br />
limitation<br />
Frequency<br />
setpoint<br />
−<br />
Speed<br />
controller<br />
p1452 p1470 p1472<br />
Flux setpoint<br />
closed loop<br />
p1750/p1755<br />
open/closed<br />
loop<br />
.<br />
.<br />
i sq<br />
i sd<br />
Current<br />
controller<br />
Act. output<br />
voltage<br />
p1610<br />
p1611<br />
Flux setpoint<br />
open loop<br />
Current<br />
measurement<br />
i u<br />
i w<br />
i v<br />
Act. angle<br />
+<br />
Act. frequency<br />
Act. output<br />
frequency<br />
−<br />
Slip<br />
+<br />
Observer model<br />
closed loop<br />
0<br />
<strong>MICROM<strong>AS</strong>TER</strong> <strong>440</strong><br />
52 Operating Instructions (Compact)
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