12.5 E: Motor Parameters
302 YASKAWA SIEPYEULA5001C LA500 Technical Manual
Note:
This value is the motor line-to-line resistance. Do not set this parameter with the per-phase resistance.
Auto-Tuning automatically sets this parameter. If you cannot do Auto-Tuning, use the test report from the motor
manufacturer to configure the settings. You can calculate the motor line-to-line resistance with one of these
formulas:
• E-type insulation: [the resistance value (Ω) shown on the test report at 75 °C] × 0.92
• B-type insulation: [the resistance value (Ω) shown on the test report at 75 °C] × 0.92
• F-type insulation: [the resistance value (Ω) shown on the test report at 115 °C] × 0.87
■ E2-06: Motor Leakage Inductance
No.
(Hex.)
Name Description
Default
(Range)
E2-06
(0313)
Motor Leakage Inductance
Sets the voltage drop from motor leakage inductance when the motor is operating at the rated
frequency and rated current. This value is a percentage of Motor Rated Voltage.
Determined by o2-04
(0.0 - 60.0%)
The drive automatically sets this parameter during Auto-Tuning.
Note:
The motor nameplate does not usually show the quantity of voltage drop. If you do not know the value of the motor leakage inductance,
contact the motor manufacturer to receive a copy of the motor test report.
■ E2-07: Motor Saturation Coefficient 1
No.
(Hex.)
Name Description
Default
(Range)
E2-07
(0314)
Motor Saturation
Coefficient 1
Sets the motor iron-core saturation coefficient at 50% of the magnetic flux.
0.50
(0.00 - 0.50)
The drive uses this coefficient when it operates with constant output. The drive uses this coefficient when it
operates the motor in the constant output range.
■ E2-08: Motor Saturation Coefficient 2
No.
(Hex.)
Name Description
Default
(Range)
E2-08
(0315)
Motor Saturation
Coefficient 2
Sets the motor iron-core saturation coefficient at 75% of the magnetic flux.
0.75
(E2-07 - 0.75)
The drive uses this coefficient when it operates with constant output. The drive uses this coefficient when it
operates the motor in the constant output range.
■ E2-09: Motor Mechanical Loss
No.
(Hex.)
Name Description
Default
(Range)
E2-09
(0316)
Expert
Motor Mechanical Loss
Sets the mechanical loss of the motor. It is set as a percentage of E2-11 [Motor Rated Power].
Usually it is not necessary to change this setting.
0.0%
(0.0 - 10.0%)
Adjust this parameter in these conditions. The drive adds the configured mechanical loss to the torque reference
value as a torque compensation value:
• There is a large quantity of torque loss from motor bearing friction.
• There is a large quantity of torque loss in fans and pumps.
■ E2-10: Motor Iron Loss
No.
(Hex.)
Name Description
Default
(Range)
E2-10
(0317)
Motor Iron Loss
Sets the motor iron loss.
Determined by o2-04
(0 - 65535 W)
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