Siemens 440 operating instructions 17.1, Sensorless vector control Slvc

Issue 10/06 6 Commissioning

6.4.17.1

P1300=20

P1452 = ...

P1470 = ...

P1472 = ...

Sensorless vector control (SLVC)

Control mode 0

20 Closed-loop Vector control – speed without encoder

SLVC can provide excellent performance for the following types of application:

•Applications which require high torque performance

•Applications which require fast respond to shock loading

•Applications which require torque holding while passing through 0 Hz

•Applications which require very accurate speed holding

•Applications which require motor pull out protection

Filter time for act. freq (SLVC) 4 ms

Sets time constant of PT1 filter to filter the frequency deviation of speed controller in operation mode SLVC (sensorless vector control).

Decreasing the value leads to a higher dynamic of the speed regulation. Instability is seen if the value is to low (or to high). p1452 = 2 can be set for most applications.

Gain speed controller (SLVC) 3.0

Enters gain of speed controller for sensorless vector control (SLVC).

Integral time n-ctrl. (SLVC) 400 ms

Enters integral time of speed controller for sensorless vector control (SLVC).

r1490

p1488 p1489

150 ms

1

p1492

r1170

Freq. setpoint

0

0

r1084

–

r0063

	Droop
p1496 p0341 p0342
	r1518
Precontrol
	p1470	p1472
r1438	Kp	Tn
*)
–			Torque
p1452	r0064		setpoint
		r1508	r0079

P1610 = ...

P1611 = ...

Act. frequency	*)	only active, if pre-control is enabled
from observer model
		(p1496 > 0)
Continuous torque boost (SLVC)			50.0 %

Sets continuous torque boost in lower frequency range of SLVC (sensorless vector control). Value is entered in [%] relative to rated motor torque r0333.

p1610 is only effective in the open-loop mode between 0 Hz and approx. ±p1755.

Acc. torque boost (SLVC) 0.0 %

Sets acceleration torque boost in lower frequency range of SLVC (sensorless vector control). Value is entered in [%] relative to rated motor torque r0333.

p1611 is only effective in the open-loop mode between 0 Hz and approx. ±p1755.

In opposite to p1610 the acceleration torque boost p1611 is only in operation during acceleration/deceleration.

MICROMASTER 440	51
Operating Instructions (Compact)