Motor Leakage Inductance: E2-06; Motor Iron-Core Saturation Coefficients 1, 2: E2-07, E2-08; Limited Output Voltage Operation: C3-06 (For Spec: F); Operation Selection When Output Voltage Saturated - YASKAWA VARISPEED-616G5 Instruction Manual

Advanced Operation

7.1.4 Operation Selection when Output Voltage Saturated

7
7.1.4 Operation Selection when Output Voltage Saturated
The default setting depends upon the Inverter capacity.
D
(The table shows the default settings for 200 V class, 0.4 kW Inverters.)
Set the motor terminal resistance (U−V, V−W, and W−U) in constant E2-05. Normally this value isn't
D
shown on the motor nameplate, so it might be necessary to contact the motor manufacturer for the ter-
minal resistance at the insulation class temperature. Use the following equations to calculate the resis-
tance value from the terminal resistance of a test report.
E-class insulation: Terminal resistance at 75°C in the test report (Ω) x 0.92
•
B-class insulation: Terminal resistance at 75°C in the test report (Ω) x 0.92
•
F-class insulation: Terminal resistance at 115°C in the test report (Ω) x 0.87
•

Motor Leakage Inductance: E2-06

User User
Constant Name
Number
E2-06
Motor leak induc-
tance
(E5-06)
The default setting depends upon the Inverter capacity.
D
(The table shows the default settings for 200 V class, 0.4 kW Inverters.)
Set the voltage drop (caused by the motor's leakage inductance) as a percentage of the motor's rated
D
voltage in constant E2-06.
This constant does not normally required setting because the Inverter automatically compensates dur-
D
ing operation.
Normally this value isn't shown on the motor nameplate, so it might be necessary to contact the motor
D
manufacturer. It is also acceptable to set the loss (caused by the motor's leakage inductance) as a per-
centage.

Motor Iron-core Saturation Coefficients 1, 2: E2-07, E2-08

User User
Constant Name
Number
Motor iron-core sat-
E2-07
uration coefficient 1
Motor iron-core sat-
E2-08
uration coefficient 2
Constants E2-07 and E2-08 are not required when using the motor at or below the rated frequency.
D
Set these constants when operating at a frequency higher that the motor's rated frequency. Set the fol-
D
lowing values:
Motor iron-core saturation coefficient 1: Core-saturation coefficient when magnetic flux is 50%.
•
Motor iron-core saturation coefficient 2: Core-saturation coefficient when magnetic flux is 75%.
•
Normally these values aren't shown on the motor nameplate, so it might be necessary to contact the
D
motor manufacturer. Operation will be possible with the factory-preset values.
The Inverter cannot output a voltage that is higher than the input voltage. If the output voltage command
to the motor (monitor constant U1-06) exceedes the input voltage in the high-speed region, the output volt-
age will become saturated, and the control unstable with open loop vector control.
Select one of the following methods to prevent this unstable condition.

Limited Output Voltage Operation: C3-06 (for SPEC: F)

J
User User
Name
Constant
Number
Limited output volt-
C3-06
age operation
Settings
D
Setting
0 Disables limited output voltage operation.
1 Enables limited output voltage operation.
Change g
during during Setting Setting Unit Factory Factory
Opera- Range
tion
0.0 to 30.0 %
×
Change g
during during Setting Setting Unit Factory Factory
Opera- Range
tion
0.00 to 0.50 −
×
0.00 to 0.75 −
×
Change g
Setting Setting Unit Factory Factory
during during
Range
Opera-
tion
0, 1 1
×
Function
7 - 8
Valid Access Levels
Open
V/f V/f with
Setting
Loop
Control PG
Vector
A
18.2
× ×
Valid Access Levels
Open
V/f V/f with
Setting
Loop
Control PG
Vector
A
0.50
× ×
A
0.75
× ×
Valid Access Levels
Open
V/f V/f with
Setting
Loop
Control PG
Vector
0 A
× ×
Flux
Vector
A
Flux
Vector
A
A
Flux
Vector
A