YASKAWA U1000 Series Technical Manual page 250

5.5 E: Motor Parameters
E2-09: Motor Mechanical Loss
■
There is normally no need to change this parameter from the default value.
This parameter sets to the motor mechanical loss as a percentage of motor rated power (kW) capacity. Adjust this setting
in the following circumstances:
• When there is a large amount of torque loss due to motor bearing friction.
• When there is a large amount of torque loss in a fan or pump application.
The setting for the mechanical loss is added to the torque.
No.
E2-09
E2-10: Motor Iron Loss for Torque Compensation
■
This parameter sets the motor iron loss in watts.
No.
E2-10
E2-11: Motor Rated Power
■
This parameter sets the motor rated power in kW. If Auto-Tuning completes successfully, the value entered to T1-02 will
automatically be saved to E2-11.
No.
E2-11
Setting Motor Parameters Manually
■
Follow the instructions below when setting motor-related parameters manually instead of using the Auto-Tuning feature.
Refer to the motor test report included with the motor to make sure the correct data is entered into the drive.
Setting the Motor Rated Current
Enter the motor rated current listed on the nameplate of the motor to E2-01.
Setting the Motor Rated Slip
Use the base speed listed on the motor nameplate to calculate the rated slip. Refer to the formula below, then enter that
value to E2-02.
Motor rated slip = rated frequency [Hz] – base speed [min
Setting the No-Load Current
Enter the no-load current at rated frequency and rated voltage to E2-03. The no-load current is not usually listed on the
nameplate. Contact the motor manufacturer if the data cannot be found.
The default setting of the no-load current is for performance with a 4-pole Yaskawa motor.
Setting the Number of Motor Poles
Only required when A1-02 is set to 0, 1, 2, 3 (Control Modes for Induction Motors). Enter the number of motor poles as
indicated on motor nameplate.
Setting the Line-to-Line Resistance
E2-05 is normally set during Auto-Tuning. If Auto-Tuning cannot be performed, contact the manufacturer of the motor to
find out what the correct resistance is between motor lines. The motor test report can also be used to calculate this value:
• E-type insulation: Multiply 0.92 times the resistance value (
• B-type insulation: Multiply 0.92 times the resistance value (
• F-type insulation: Multiply 0.87 times the resistance value (
250
Parameter Name
Motor Mechanical Loss
Parameter Name
Motor Iron Loss for Torque Compensation
Parameter Name
Motor Rated Power
] × (no. of motor poles) / 120
-1
) listed on the test report at 75
Ω
) listed on the test report at 75
Ω
) listed on the test report at 115
Ω
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Setting Range
0.0 to 10.0%
Setting Range
Determined by C6-01 and
0 to 65535 W
Setting Range
Determined by
0.00 to 650.00 kW
C6-01 and o2-04
C.
°
C.
°
C.
°
Default
0.0%
Default
o2-04
Default