Lenze 9400 Uživatelský manuál stáhnout pdf (Strana 173)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06 173

5 Motor interface

5.5 Sensorless vector control (SLVC)

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

5.5.3.1 Optimising field feedforward control

To optimise the field feedforward control, the drive must be accelerated in the base speed range

with slow setpoint ramps (e.g. acceleration time = 5 s) to speed values below the rated speed and

then decelerated again.

• If the field current oscillates at the beginning of the acceleration and at the end of the

deceleration (Current.dnActualDirectCurrent), these oscillations can be reduced by increasing

the gain for the field current controller in C00985

.

[5-9] Oscillogram 1: speed ramp (motor 55 kw) – field controller gain = 0.00

[5-10] Oscillogram 2: speed ramp (motor 55 kw) – field controller gain = 2.00

Ch Variable of the motor control

Unit 1/div Offset Position

1 Speed.dnSpeedSetpoint (speed setpoint) rpm 0.2k 0 -4

2 Speed.dnActualMotorSpeed (current speed) rpm 0.2k 0 -4

3 Current.dnActualDirectCurrent (actual field current) A 10 0 0

4 Current.dnQuadratureCurrentSet (cross current setpoint) A 10 0 0

5 Current.dnActualQuadratureCurrent (actual cross current) A 10 0 0

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 953 954

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