Lenze 8400 HighLine - Manual (Page 189)

Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
189
5 Motor control (MCTRL)
5.7 Sensorless vector control (SLVC)
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5.7 Sensorless vector control (SLVC)
Sensorless vector control (SLVC) is based on a better motor current control according to a field-
oriented control mode by Lenze.
In comparison to the V/f characteristic control without feedback, the following can be achieved by
means of sensorless vector control SLVC:
• A higher maximum torque throughout the entire speed range
• A higher speed accuracy
• A higher concentricity factor
• A higher level of efficiency
• The implementation of torque-controlled operation with speed limitation
• The limitation of the maximum torque in motor and generator mode for speed-controlled
operation

Stop!
• The sensorless vector control (SLVC) is only suitable for asynchronous motors.
• The connected motor may be maximally two power classes lower than the motor
assigned to the controller.
• Operation of the sensorless vector control (SLVC) is only permissible for one single
drive!
• Operation of the sensorless vector control (SLVC) is not permissible for hoists!
• The Lenze setting permits the operation of a power-adapted motor. Optimal
operation is only possible if either:
• the motor is selected via the »Engineer« motor catalogue,
• the motor nameplate data are entered and motor parameter identification is
carried out afterwards
- or -
• the nameplate data and equivalent circuit data of the motor (motor leakage
inductance and mutual motor inductance, slip compensation and motor stator
resistance) are entered manually.
• When you enter the motor nameplate data, take into account the phase connection
implemented for the motor (star or delta connection). Only enter the data applying to
the selected connection type.
• In this context, also observe the instructions in chapter " Adapting the V/f base
frequency " relating to V/f characteristic control. ( 161)

Note!
Optimal operation of the sensorless vector control (SLVC) can be achieved from a
minimum speed of approx. 0.5-fold slip speed. At lower speed values below the 0.5-fold
slip speed, the maximum torque is reduced.
The maximum field frequency with this motor control mode is 650 Hz.