Lenze 8400 User Manual

5 Motor control (MCTRL)
5.8 Sensorless control for synchronous motors (SLPSM)
216
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.8.4 Optimising the control mode
The measures described in the following subchapters serve to further optimise the control
behaviour of the sensorless control for synchronous motors and adjust it to the concrete
application.
• Optimise current controller
. ( 217)
• The current controller should always be optimised if a motor of a third-party manufacturer
with unknown motor data is used!
• Optimise speed controller
. ( 218)
• The setting of the speed controller must be adapted depending on the mechanical path.
• Optimise response to setpoint changes and determine mass inertia
. ( 221)
• For an optimal reference behaviour, the total moment of inertia can be used to make a
feedforward control of the speed setpoint.
• Current-dependent stator leakage inductance Ppp(I)
. ( 224)
• If the motor is operated with very low and very high currents during the process (e.g. in Pick
and place-applications), the stator leakage inductance and current controller parameters can
be tracked by means of an adjustable saturation characteristic.
 Note!
From version 12.00.00:
• Following successful motor parameter identification, the current controller
parameters (C00075
, C00076) are calculated automatically.
• If these parameters are not
to be calculated, bit 4 of C02865/1 must be set to "1".
• Following successful motor parameter identification, the speed controller parameters
(C00070/3
, C00071/3) can be calculated automatically.
• If these parameters are to be calculated, bit 6 of C02865/1
must be set to "5".
• Following successful motor parameter identification, other controller parameters
(C00011
, C00022) can be calculated automatically.
• If these parameters are to be calculated, bit 6 of C02865/1
must be set to "6".
 Note!
Current setpoint filter (band-stop filter) / jerk limitation
The use of the functions is only recommended in exceptional cases.
The functions are described in chapter "Servo control (SC)
":
Setting the current setpoint filter (band-stop filter)
( 248)
Adapting the max. acceleration change (jerk limitation)
( 249)

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V