Sensorless Vector Control (Slvc) - Lenze i55AE125B Manual

8.2.3

Sensorless vector control (SLVC)

Sensorless (field-oriented) vector control for asynchronous motors is based on a decoupled,
separate control for the torque-producing and the field-producing current component. In
addition, the actual speed is reconstructed by means of a motor model so that a speed sensor
is not required.
Preconditions
Sensorless vector control (SLVC) is only suitable for asynchronous motors.
•
The operation of the sensorless vector control (SLVC) is only permitted for a single drive,
•
i. e., only one motor may be connected to the inverter.
Operation of the sensorless vector control (SLVC) is not permissible for hoists!
•
Supported operating modes
"MS: Velocity mode [-2]"
•
"MS: Torque mode [-1]"
•
"CiA: Velocity mode [2]"
•
Details
This motor control type is activated by setting
(SLVC) [4]".
Compared to the V/f characteristics, the sensorless vector control (SLVC) serves to achieve
improved drive characteristics thanks to:
higher torque throughout the entire speed range
•
higher speed accuracy and higher concentricity factor
•
higher efficiency
•
Sensorless vector control (SLVC)
①
V/f characteristic control (VFC)
②
For a speed control with torque limitation in operating mode
ity mode [-2]":
1. Select the source in 0x2949:001 (P337.01)
accordingly.
2. Select the source in 0x2949:002 (P337.02)
accordingly.
Alternatively, the inverter can be configured in this motor control type in such a way that it
controls a motor torque within a defined frequency range. For details, see chapter
control w/ freq. limit".
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Parameter Name / value range / [default setting]
0x2B40:003 Q-Feedforward
0.00 ... [0.00] ... 10000.00
• From version 03.00
0x2B40:004 D-Feedforward
0.00 ... [0.00] ... 10000.00
• From version 03.00
0x6060 (P301.00):
0x2C00 (P300.00)
Torque
Rated torque
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for the positive torque limit source and set it
for the negative torque limit source and set it
Sensorless vector control (SLVC)
= "Sensorless vector control
Speed
Rated speed
0x6060 (P301.00) = "MS: Veloc-
"Torque
Info
Feedforward control for the SLVC Q controller.
Feedforward control of the SLVC-D controller.
Motor control
Motor control selection
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