Lenze i55 Series User Manual

8.2.5.1 Stall monitoring
The stalling monitoring for the sensorless control for synchronous motors (SL-PSM) switches
o the drive if the motor is about to "stall". A possible cause may be an overload of the motor.
Precondions
The stalling monitoring only works in the controlled area and if the motor is not operated in
the eld weakening range.
Details
In order to detect the motor stalling, the cosine phi is used.
Example:
•
For the cosine phi, the value "0.9" is set in 0x2C01:008 (P320.08) according to the data
given on the motor nameplate.
•
The limit value for stalling monitoring is set in 0x2C11:006 to "80 %".
•
Stalling monitoring is triggered if the current cosine phi is lower than 0.72 (80 % of 0.9).
If stalling monitoring is triggered, the "Trouble" error response takes place. If
the operang mode "MS: Velocity mode [-2]" is set in 0x6060 (P301.00), the
motor automacally restarts if the trouble does not exist anymore.
Parameter Name / value range / [default seng] Info
0x2C11:006 High speed range: Stall monitoring limit
0 ... [50] ... 65535 %
•
From version 04.00
The stall monitoring limit refers to the cosine phi of the motor in per-
cent.
0x6060
(P301.00)
Modes of operaon
(Modes of op.)
•
Seng can only be changed if the inverter is inhibi-
ted.
Selecon of the operang mode.
-2 MS: Velocity mode Vendor specic velocity mode
-1 MS: Torque mode (from version 03.00) Vendor specic torque mode
•
Only possible in motor control type 0x2C00 (P300.00) = "Sensorless
vector control (SLVC) [4]" or "Servo control (SC ASM) [2]".
4Torque control w/ freq. limit ^ 206
0 No mode change/no mode assigned No operang mode (standsll)
2 CiA: Velocity mode CiA 402 velocity mode
Motor control
Motor control selecon
Sensorless control for synchronous motors (SL-PSM)
181

Lenze i55 Series Specifications

General

Brand	Lenze
Model	i55 Series
Category	Inverter
Language	English