Lenze i55AE155F User Manual

8.2.4 Servo control for asynchronous motors (SC-ASM)
The eld-oriented servo control is based on a decoupled, separated control of the torque-pro-
ducing and eld-producing current share. The motor control is based on a feedback, eld-ori-
ented and cascaded controller structure and enables a dynamic and stable operaon in all
four quadrants.
Precondions
•
The servo control (SC ASM) is only suitable for asynchronous motors.
•
The servo control (SC-ASM) requires a feedback of the speed. A motor encoder must be
connected to the inverter and set as feedback system for the motor control.
•
This seng is not made automacally if a motor is selected from the motor catalog.
•
For required sengs see chapter "HTL encoder". ^ 496
Details
This motor control type is acvated by seng 0x2C00 (P300.00) = "Servo control (SC ASM)
[2]".
Basically, the servo control has the same advantages as the sensorless vector control (SLVC).
Compared to the V/f characterisc control without feedback, the following can be achieved by
means of the servo control:
•
A higher maximum torque throughout the enre speed range
•
A higher speed accuracy
•
A higher concentricity factor
•
A higher level of eciency
•
The implementaon of torque-actuated operaon with speed limitaon
•
The limitaon of the maximum torque in motor and generator mode for speed-actuated
operaon
For a speed control with torque limitaon in operang mode 0x6060 (P301.00) = "MS: Veloc-
ity mode [-2]":
1.
Select the source in 0x2949:001 (P337.01) for the posive torque limit source and set it
accordingly.
2.
Select the source in 0x2949:002 (P337.02) for the negave torque limit source and set it
accordingly.
Alternavely, the inverter can be congured in this motor control type in such a way that it
controls a motor torque within a dened frequency range. For details, see chapter "Torque
control w/ freq. limit". ^ 206
Parameter Name / value range / [default seng] Info
0x2901 Speed controller gain adapon
0.00 ... [100.00] ... 200.00 %
•
From version 04.00
Mappable parameter for adapve adjustment of the speed controller
gain via network.
0x2949:001
(P337.01)
Posive torque limit source
(Pos. torqlim src)
•
From version 03.00
Selecon of the source for the posive torque limit source.
0 Max torque Posive torque limit source = Max torque 0x6072 (P326.00).
1 Fixed Limit 0.0 % Posive torque limit source = 0.0 %.
2 Analog Input 1 The posive torque limit source is dened as analog signal via the analog
input 1.
4Analog input 1 ^ 597
3 Analog Input 2 The posive torque limit source is dened as analog signal via the analog
input 2.
4Analog input 2 ^ 601
4 Posive torque limit Posive torque limit source = Posive torque limit 0x60E0.
5 Network target torque The posive torque limit source is dened as process data object via net-
work.
4Conguring the network ^ 226
Motor control
Motor control selecon
Servo control for asynchronous motors (SC-ASM)
176

Lenze i55AE155F Specifications

General

Brand	Lenze
Model	i55AE155F
Category	Inverter
Language	English