5.5 E: Motor Parameters
■ E2-11: Motor Rated Power
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.
Parameter Name
Setting Range
Default
E2-11
Motor Rated Power
0.00 to 650.00 kW
Determined by o2-04
■ Setting Motor Parameters Manually
Follow the instructions below when setting motor-related parameters manually instead o f Auto-Tuning. Refer to the
motor test report included with the motor to ensure the correct data is entered into the drive.
Setting the M otor Rated Current
Enter the motor rated current listed on the nameplate o f the motor to E2-01.
Setting the M otor Rated Slip
Calculate the motor rated slip using the base speed listed on the motor nameplate. Refer to the formula below, then enter
that value to E2-02.
Motor rated slip = rated frequency [Hz] -base speed [r/min] x (no. o f motor poles) / 120
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 in V /f Control with PG and Closed Loop Vector Control. 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 motor manufacturer to
determine the correct resistance between motor lines. The motor test report can also be used to calculate this value using
the formulas below:
• E-type insulation: Multiply 0.92 times the resistance value (Q) listed on the test report at 75 °C.
• B-type insulation: Multiply 0.92 times the resistance value (Q) listed on the test report at 75 °C.
• F-type insulation: Multiply 0.87 times the resistance value (Q) listed on the test report at 115 °C.
Setting the M otor Leakage Inductance
The motor leakage inductance set to E2-06 determines the amount o f voltage drop relative to the motor rated voltage.
Enter this value for motors with a low degree of inductance, such as high-speed motors. This information is usually not
listed on the motor nameplate. Contact the motor manufacturer if the data cannot be found.
Setting the Motor Iron-Core Saturation Coefficient 1, 2
E2-07 and E2-08 are set when Auto-Tuning is performed.
Setting the M otor Mechanical Loss
Only required in Closed Loop Vector Control. The drive compensates for the degree o f mechanical loss with torque
compensation. Although E2-09 rarely needs to be changed, adjustment may benefit when there is a large amount of
torque loss due to motor bearing friction.
Setting the Motor Iron Loss fo r Torque Compensation
Only required when using V /f Control. Enter this value in watts to E2-10. The drive uses this setting to improve the
precision o f torque compensation.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
