12.6 E: Motor Parameters
832 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ E4-05: Motor 2 Line-to-Line Resistance
No.
(Hex.)
Name Description
Default
(Range)
E4-05
(0325)
Motor 2 Line-to-Line
Resistance
Sets the line-to-line resistance for the motor 2 stator windings.
Determined by o2-04, C6-01
(0.000 - 65.000 Ω)
Note:
This value is the line-to-line resistance for motor 2. Do not set this parameter with the resistance per phase.
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] × 0.822
• B-type insulation: [the resistance value (Ω) shown on the test report at 75 °C] × 0.822
• F-type insulation: [the resistance value (Ω) shown on the test report at 115 °C] × 0.728
■ E4-06: Motor 2 Leakage Inductance
No.
(Hex.)
Name Description
Default
(Range)
E4-06
(0326)
Motor 2 Leakage Inductance
Sets the voltage drop from motor 2 leakage inductance as a percentage of Motor Rated Voltage when
motor 2 operates at the rated frequency and rated current.
Determined by o2-04, C6-01
(0.0 - 60.0%)
The drive sets this parameter during Rotational Auto-Tuning and Stationary Auto-Tuning.
Note:
You cannot usually find the quantity of voltage drop on the motor nameplate. If you do not know the value of the motor 2 leakage
inductance, get the test report from the motor manufacturer.
■ E4-07: Motor 2 Saturation Coefficient 1
No.
(Hex.)
Name Description
Default
(Range)
E4-07
(0343)
Motor 2 Saturation
Coefficient 1
Sets the motor 2 iron-core saturation coefficient at 50% of the magnetic flux.
0.50
(0.00 - 0.50)
The drive sets this parameter during Rotational Auto-Tuning. The drive uses this value when it operates the motor in
the constant output range.
■ E4-08: Motor 2 Saturation Coefficient 2
No.
(Hex.)
Name Description
Default
(Range)
E4-08
(0344)
Motor 2 Saturation
Coefficient 2
Sets the motor 2 iron-core saturation coefficient at 75% of the magnetic flux.
0.75
(E4-07 - 0.75)
The drive sets this parameter during Rotational Auto-Tuning. The drive uses this value when it operates the motor in
the constant output range.
■ E4-09: Motor 2 Mechanical Loss
No.
(Hex.)
Name Description
Default
(Range)
E4-09
(033F)
Expert
Motor 2 Mechanical Loss
Sets the mechanical loss of motor 2. It is set as a percentage of E4-11 [Motor 2 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.
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