YASKAWA CIMR-G5A Series - Open-Loop Vector Control; Precautions before Autotuning; Motor Selection: E1-02

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
basic operation with open-loop vector control.
Always perform autotuning for the motor unit separately before vector control operation. Vector control is not
effective without autotuning.
To operate with the greatest speed precision near the rated speed, select a motor with a rated voltage that is at
least 20 V below the Inverter’s input power supply voltage for 200 V class Inverters and 40 V below for 400 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 the motor cannot be disconnected from the load, motor constants can be set by 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 sys-
tem’s autotuning function determines the size of a load, so these autotuning functions are fundamental-
ly different.
D
If a load is connected when autotuning is performed, not only will incorrect motor constants be re-
corded, but the motor may operate erratically or unexpectedly. Disconnect the load before performing
autotuning.
D
The motor shaft with rotate when autotuning is performed. Confirm safety before starting autotuning.
J Inverter Input Voltage Setting: E1-0
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
×
155 to 255
(310 to 510)
VA C
200
(400)
Q Q Q Q
D
The voltage settings shown in parentheses are the values for the 400 V class. This setting is used as
the reference value for functions such as the protection functions.
J Motor Selection: E1-02
D
Set the type of motor being used. This setting is a reference for overheating protection functions.
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
E1-02
Motor selection
(motor overheating
protection)
×
0to2 − 0
Q Q Q Q
D
Settings
Setting Function
0
Standard motor (general-purpose motor)
1
Special motor (inverter-exclusive motor)
2
Special motor (vector-exclusive motor)
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.
The rated voltage for vector control motors may be 10% to 20% lower than that for general-pur-
pose motors. Check the voltage on the nameplate or in the test reports.
• Rated Current
Set the rated current (A) shown on the motor nameplate.
6