YASKAWA U1000 Series - Page 249

5.5 E: Motor Parameters
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual 249
Parameter Details
5
■ E2-03: Motor No-Load Current
Set the no-load current for the motor in amperes when operating at the rated frequency and the no-load voltage. The drive
sets E2-03 during the Auto-Tuning process (Rotational Auto-Tuning and Stationary Auto-Tuning 2 and 3). The motor
no-load current listed in the motor test report can also be entered to E2-03 manually. Contact the motor manufacturer to
receive a copy of the motor test report.
Note: Display is in the following units.
 CIMR-U20028, 20042, and 40011 to 40027: 0.01 A units
 CIMR-U20054 to 20248, and 40034 to 40930: 0.1 A units
■ E2-04: Number of Motor Poles
Set the number of motor poles to E2-04. If Auto-Tuning completes successfully, the value entered to T1-06 will
automatically be saved to E2-04.
■
E2-05: Motor Line-to-Line Resistance
Sets the line-to-line resistance of the motor stator winding. If Auto-Tuning completes successfully, this value is
automatically calculated. Remember that this value must be entered as line-to-line and not for each motor phase.
If Auto-Tuning is not possible, then contact the motor manufacturer to find out the line-to-line resistance or measure it
manually. When using the manufacturer motor test report, calculate E2-05 by the formulas below.
• E-type insulation: Multiply 0.92 times the resistance value (Ω) listed on the test report at 75°C
• B-type insulation: Multiply 0.92 times the resistance value (Ω) listed on the test report at 75°C.
• F-type insulation: Multiply 0.87 times the resistance value (Ω) listed on the test report at 115°C.
■
E2-06: Motor Leakage Inductance
Sets the voltage drop due to motor leakage inductance as a percentage of motor rated voltage. This value is automatically
set during Auto-Tuning (Rotational Auto-Tuning, Stationary Auto-Tuning 2 and 3).
■
E2-07: Motor Iron-Core Saturation Coefficient 1
Sets the motor iron saturation coefficient at 50% of the magnetic flux. If Rotational Auto-Tuning completes successfully,
then this value is automatically calculated and set to E2-07. This coefficient is used when operating with constant output.
■
E2-08: Motor Iron-Core Saturation Coefficient 2
Sets the motor iron saturation coefficient at 75% of the magnetic flux. If Rotational Auto-Tuning completes successfully,
then this value is automatically and set to E2-08. This coefficient is used when operating with constant output.
No. Parameter Name Setting Range Default
E2-03 Motor No-Load Current
0.00 A to [E2-01]
(unit: 0.01 A)
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E2-04 Number of Motor Poles 2 to 48 4
No.
<1> The units are expressed in mΩ for models CIMR-U40900, CIMR-U40930.
Parameter Name Setting Range Default
E2-05 Motor Line-to-Line Resistance 0.000 to 65.000 Ω <1>
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E2-06 Motor Leakage Inductance 0.0 to 40.0%
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E2-07 Motor Iron-Core Saturation Coefficient 1 0.00 to 0.50 0.50
No. Parameter Name Setting Range Default
E2-08 Motor Iron-Core Saturation Coefficient 2 E2-07 to 0.75 0.75
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