2.5 E: Motor Parameters
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
159
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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.
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Setting Motor Parameters Manually
Follow the instructions below when setting motor-related parameters manually instead of Auto-Tuning. 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 in 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 in E2-02.
Motor rated slip = rated frequency [Hz]
–
base speed [r/min] x (no. of motor poles) / 120
Setting the No-Load Current
Enter the no-load current at the rated frequency and rated voltage in E2-03. The no-load current is not usually listed on
the nameplate. Contact the motor manufacturer if the data cannot be found.
Setting the Number of Motor Poles
Only required in 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 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 (W) listed on the test report at 75 °C.
• B-type insulation: Multiply 0.92 times the resistance value (W) listed on the test report at 75 °C.
• F-type insulation: Multiply 0.87 times the resistance value (W) listed on the test report at 115 °C.
Setting the Motor Leakage Inductance
The motor leakage inductance set in E2-06 determines the amount of voltage drop relative to the motor rated voltage.
This value should be entered particularly for motors with a low degree of inductance, such as high-speed motors. As this
information is not listed on the motor nameplate, contact the motor manufacturer to find out the correct value for the
motor leakage inductance.
Setting the Motor Iron-Core Saturation Coefficient 1, 2
E2-07 and E2-08 are set when Rotational Auto-Tuning is performed.
Motor Mechanical Loss
The drive only requires this information when using Closed Loop Vector Control. The drive compensates for the degree
of mechanical loss with torque compensation. Although E2-09 rarely needs to be changed, adjustment may benefit 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
Setting the Motor Iron Loss for 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 of torque compensation.
No.
<1> For details on the default settings, refer to
Defaults by Drive Model Selection (o2-04) on page 87
Name
Setting Range
Default
E2-11
Motor Rated Power
0 to 65000 kW
Determined by o2-04
MV1000ParameterGuide_E_conditional.book 159 ページ ２０１３年１０月１１日 金曜日 午後８時１８分
