Using Vector Control Mode; Precautions For Voltage Vector Control Application - Omron VARISPEED V7 User Manual

Using Vector Control Mode

Set the Control Mode Selection (n002) to use vector control mode.
n002 = 0: V/f control mode (factory setting)
1: Vector control mode

Precautions for Voltage Vector Control Application

Vector control requires motor constants. The factory settings constants
have been set at the factory prior to shipment. Therefore, when a motor
designed for an Inverter is used or when a motor from any other manu-
facturer is driven, the required torque characteristics or speed control
characteristics may not be maintained because the constants are not suit-
able. Set the following constants so that they match the required motor
constants.
Con- Name
stant
No.
Motor Rated Slip
n106
Motor Line-to-
n107
neutral Resis-
tance
Motor Rated Cur-
n036
rent
Motor No-load
n110
Current
* Setting depends on Inverter capacity. (Refer to pages 245 and 246.)
Adjustment of the Torque Compensation Gain (n103) and the Torque
Compensation Time Constant (n104) is normally not required.
Adjust the torque compensation time constant under the following con-
ditions:
• Increase the setting if the motor generates vibration.
• Reduce the setting if response is slow.
Adjust the Slip Compensation Gain (n111) while driving the load so
that the target speed is reached. Increase or decrease the setting in incre-
ments of 0.1.
6 Programming Features
Unit
0.1 Hz
0.001 Ω
(less than 10 Ω)
0.01 Ω
(10 Ω or more)
0.1 A
1%
Setting Factory
Range Setting
0.0 to
20.0 Hz
0.000 to
65.50 Ω
0% to 150%
of Inverter
rated current
0% to 99%
(100% =
motor rated
current)
*
*
*
*
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