Starting Torque Compensation Function (C4-03 To C4-05); Automatic Speed Regulator (Asr) (Closed Loop Vector Only) - Omron VARISPEED L7 Manual

Starting Torque Compensation Function (C4-03 to C4-05)

A starting torque compensation can be applied to speed up the torque establishment at start in Open Loop Vec-
tor control.
Related Parameters
Parameter
No.
C4-03
C4-04
C4-05
It works like shown in the following diagram.
Forward (Reverse) Run command
Time constant: C4-05
Torque compensation
volume
E1-09
Output frequency
6
When this function is used, the following should be considered:
Both values, C4-03 and C4-04 have to be set.
•
The compensation works for motoring operation only. It can not be used for regenerative operation.
•
If the starting torque compensation is used and a large shock is generated at the start, increase the starting
•
torque compensation time constant (C4-05)
The function can be not be used unrestricted for elevators, since the load is not know before the start.
•

Automatic Speed Regulator (ASR) (Closed Loop Vector only)

In Closed Loop Vector control the automatic speed regulator (ASR) adjusts the torque reference in order to
eliminate the deviation between the speed reference and the measured speed (PG feedback). The ASR settings
determine the motor speed accuracy and stability.
Frequency
Reference
32
6-
Name
Starting torque compensation value (forward direction)
Starting torque compensation value (reverse direction)
Starting torque compensation time constant
OFF
Time constant: C4-02
C4-05 x 4
Fig 6.10 Time Chart for Starting Torque Frequency
C5-01/03/09
+
P
-
Motor
Speed
Fig 6.11 ASR Block Diagram
Change
Factory
Setting
Operation
0.0
0.0
1 ms
ON
C4-03 (forward)
C4-04 (reverse, negative polarity)
Fig 6.11 shows the ASR structure.
+
Delay
Time
+
I
C5-08
C5-02/04/10
I-Limit
Control Methods
Open Closed
during
V/f Loop Loop
Vector Vector
No - A
No - A
No - A
E1-09
Torque
Reference
Torque
Limits
Closed
Loop
Vector
(PM)
- -
- -
- -