Yaskawa G5HHP Drive - Manual (Page 136)

Basic Operation
6.2.1 Autotuning
6 - 18
6.2 Open-loop Vector Control
Open-loop vector control is vector control without a pulse generator input. Autotuning is the only setting for ba-
sic operation with open-loop vector control.
Always perform autotuning for motor unit separately before vector control operation.
To operate with the greatest speed precision near the rated speed, select a motor with a rated voltage that is at
least 40 V below the Inverter’s input power supply voltage for 400-V Class Inverters and 60 V below for 575-V
Class Inverters. When the input voltage is the same as the rated voltage, the voltage limit may be applied and
vector control won’t be established.
6.2.1 Autotuning
CAUTION
D Do not connect a load to the motor when performing autotuning.
Doing so may result in personal injury or equipment damage.
When motor cannot be disconnected from the load, motor constantscan be setby calculation. Contact your
YASKAWA representatives for details.
J
Precautions before Autotuning
D
The Inverter’s autotuning function automatically determines the motor constants while a servo system’s
autotuning function determines the size of a load, so these autotuning functions are fundamentally dif-
ferent.
D
If a load is connected when autotuning is performed, not only will incorrect motor constants be recorded,
but the motor may operate erratically or unexpectedly. Disconnect the load before autotuning.
D
The motor shaft with rotate when autotuning is performed. Confirm safety before starting autotuning.
D
When motor cannot disconnected from the load, motor constants can be set by calculation. Contact your
YASKAWA representatives for details.
J
Inverter Input Voltage Setting: E1-01
D
Set the Inverter input voltage (E1-01) to match the power supply voltage.
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
E1-01 Input voltage setting x
360 to
460(460 to
690)
VAC
400
(600)
Q Q Q Q
D
The voltage settings shown in parentheses are the values for the 575-V class. This setting is used as the
reference value for functions such as the protection functions.
J
Required Constant Settings
1. Enter autotuning mode and make the following constant settings:
•
Rated Voltage
Set the rated voltage (VAC) shown on the motor nameplate.
•
Rated Current
Set the rated current (A) shown on the motor nameplate.
•
Rated Frequency
Set the rated frequency (Hz) shown on the motor nameplate.
•
Rated Speed
Set the rated speed (r/min) shown on the motor nameplate.
•
Number of Poles
Set the number of poles.
•
Motor Selection
Select motor 1 or motor 2. (Normally select motor 1.)
2. The following message will appear when the constants have been set:
Tuning Ready?
Press RUN Key
The “Press RUN Key” message will
blink.
6