Automatic Torque Boost Control With Sensor - Omron RX2 Series User Manual

7 Advanced Settings

7-2-15 Automatic Torque Boost Control with Sensor

Automatic torque boost control is used when a motor with an encoder is driven; that require a certain
torque at the start; and when the motor revolution speed needs to be equal to the command speed.
The feedback of the encoder signal from the motor allows highly accurate frequency control.
As for adjustment of the automatic torque boost control, refer to 7-2-6 Automatic Torque Boost on page
7-12.
In the V/f control with feedback (FB), a correction of PI control is conducted on the command frequency
for the fed-back frequency to control the motor.
Precautions for Correct Use
• When [CA-90] = 02, Input terminals [A] and [B] are switched to the terminals for feedback
control. When [CA-90] ≠ 02, terminals [EA] and [EB] of the feedback option RX2-PG01 are
enabled.
• See 7-2-16 Encoder Feedback Control on page 7-37.
Output
frequency
 Parameter
Item
Control mode
selection,
1st-motor
Slip Compensa-
tion P-gain witn
encoder, 1st-motor
Slip Compensa-
tion I-gain witn
encoder, 1st-motor
7 - 36
PI control
Deviation ε
+ 1
( )
Kp 1+
∙
Ti S
-
Kp: proportional gain setting; Ti: integral time; s: operator; ε: deviation
Ki: integral gain setting (Ki = Ti/Kp)
Parameter Data
[AA121] 07
[Hb170] 0 to 1000(%)
[Hb171] 0 to 1000(%)
Control
frequency
+
Frequency-volt-
age control
+
Description
To use the automatic torque boost with sensor.
This is the P gain for the slip compensation of
control with sensor.
This is the I gain for the slip compensation of
control with sensor.
High-function General-purpose Inverter RX2 Series User's Manual
M
Feedback
Default
data
00
100
100