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5.5 E: Motor Parameters
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
251
5
Setting the Motor Leakage Inductance
The motor leakage inductance set to 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 Auto-Tuning is performed.
Setting the 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
This value only needs to be set 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.
◆
E3: V/f Pattern for Motor 2
These parameters set the V/f pattern used for motor 2.
Refer to Setting 16: Motor 2 selection on page 271
switching motors.
Note:
As the function for switching between two motors cannot be used with a PM motor, the E3-
parameters will be hidden when
a PM motor control mode is selected (A1-02 = 5, 6, or 7).
■
E3-01: Motor 2 Control Mode Selection
Selects the control mode for motor 2. A control mode for PM motors cannot be selected for motor 2.
Note: 1.
E3-01 dependant parameters are reset to the default settings when E3-01 is changed.
2.
Protection from motor overload (oL1) is determined by L1-01, just as it is for motor 1.
Setting 0: V/f Control
Setting 1: V/f Control with PG
Setting 2: Open Loop Vector Control
Setting 3: Closed Loop Vector Control
No.
Parameter Name
Setting Range
Default
E3-01
Motor 2 Control Mode Selection
0 to 3
0
SIEP_C710636_02B_1_0.book 251 ページ 2015年11月25日 水曜日 午後4時56分