Lenze 8400 - Manual (Page 51)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
51
3 Commissioning
3.3 Notes on motor control
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3.3 Notes on motor control
In the Lenze setting, the V/f characteristic control (VFCplus) as motor control is set in C00006 with
a linear characteristic.
• V/f characteristic control (VFCplus) is a motor control mode for classic frequency inverter
applications on the basis of a simple and robust control procedure for the operation of machines
with a linear or quadratic load torque characteristic (e.g. fans).
• The presettings of the parameters ensure that the controller is immediately ready for operation
and the motors works adequately without further parameterisation if a controller and a 50 Hz
asynchronous machine with matching performances are assigned.
Recommendations for the following application cases:
• If the controller and motor differ greatly in terms of performance:
Set the Imax limit (in motor mode) in C00022 to 2x rated motor current.
• If a high starting torque is required:
When the motor is idling, set a value for Vmin boost in C00016 which ensures that the rated
motor current flows at a field frequency of f = 3 Hz (display in C00058 ).
• For noise optimisation:
In C00018 , set a switching frequency of "16 kHz var./drive-opt.".
• If a high torque must be provided at small speeds without feedback:
Select "Sensorless vector control (SLVC) as motor control mode in C00006 .
Related topics:
 Motor control (MCTRL) ( 127)

Note!
Check the nameplate data against the motor data set in the controller. Further
information is provided in the chapter " Motor selection/Motor data ". ( 128)