Lenze 8400 User Manual

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 195
5 Motor control (MCTRL)
5.7 Sensorless vector control (SLVC)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.7.2 Types of control
The sensorless vector control can be operated in two different modes:
• Speed control with torque limitation
(bTorquemodeOn = FALSE)
• Torque control with speed limitation
(bTorquemodeOn = TRUE)
5.7.2.1 Speed control with torque limitation
When bTorquemodeOn = FALSE, the drive system is operated with a selected speed setpoint in a
speed-controlled manner.
The operational performance can be adapted in the following ways:
A. Overload limitation in the drive train
B. Motor current limitation
C. Slip compensation
Overload limitation in the drive train
The torque is limited via the torque setpoint.
• The torque setpoint is identical to the value at the output of the speed controller,
nOutputSpeedCtrl.
• To avoid overload in the drive train, the torque in motor mode can be limited via the
nTorqueMotLimit_a process input signal, and the torque in generator mode can be limited via
the nTorqueGenLimit_a process input signal:
 Note!
From version 13.00.00, the torque setpoint nSpeedSetValue_a is set to 0 by quick stop
(QSP) device-internally and the torque limit values nTorqueMotLimit_a and
nTorqueGenLimit_a are set to 100 % to stop the drive quickly and safely anytime. The
previous behaviour can be set in C2865/1
via bit 12 and bit 13.
Designator
DIS code | data type
Information/possible settings
nTorqueMotLimit_a
C00830/29 | INT
Torque limitation in motor mode
• Scaling: 16384 ≡ 100 % M
max
(C00057)
• Setting range: 0 … +199.99 %
• If keypad control is performed: Parameterisable via C00728/1
.
nTorqueGenLimit_a
C00830/28 | INT
Torque limitation in generator mode
• Scaling: 16384 ≡ 100 % M
max
(C00057)
• Setting range: -199.99 ... 0 %
• If keypad control is performed: Parameterisable via C00728/2
.
 Note!
To avoid instabilities during operation, the torque limit values are internally processed
as absolute values.

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