Emotron VS10 - Stall Monitoring

140 01-6203-01R3, CG Drives & Automation
7.2.3.1. Stall monitoring
The stalling monitoring for the sensorless control for synchronous motors (SL-PSM)
switches off the drive if the motor is about to "stall". A possible cause may be an overload
of the motor.
Preconditions
The stalling monitoring only works in the controlled area and if the motor is not operated
in the field 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 operating mode "MS: Velocity mode [-2]" is set in 0x6060 (P301.00), the
motor automatically restarts if the trouble does not exist anymore.
Parameter
Name / value range / [default setting]
Info
0x2C11:006
High speed range: Stall monitoring limit
0 ... [80] ... 65535 %
•
From version 04.00
The stall monitoring limit refers to the cosine phi of the motor in
percent.
0x6060 (P301.00)
Modes of operation (Modes of op.)
• Setting can only be changed if the inverter is
inhibited.
Selection of the operating mode.
-2 MS: Velocity mode Vendor specific velocity mode
-1
MS: Torque mode
(from version 03.00)
Vendor specific torque mode
•
Only possible in motor control type 0x2C00 (P300.00) =
"Sensorless
vector control (SLVC) [4]".
 Torque control w/ freq. limit  147
0
No mode change/no mode assigned
No operating mode (standstill)
2
CiA: Velocity mode
CiA 402 velocity mode