2.6 E: Motor Parameters
256 YASKAWA TOEPYAIGA5002A GA500 Programming
E4-02 = f - (n × p) / 120
• f: Motor rated frequency (Hz)
• n: Rated motor speed (min
-1
(r/min))
• p: Number of motor poles
■ E4-03: Motor 2 Rated No-Load Current
No.
(Hex.)
Name Description
Default
(Range)
E4-03
(0323)
Motor 2 Rated No-Load
Current
Sets the no-load current for motor 2 in amps when operating at the rated frequency and the no-load
voltage.
Determined by o2-04, C6-01
(0 to E4-01)
Note:
When the drive model changes, the display units for this parameter also change.
• 0.01 A: B001 - B018, 2001 - 2042, 4001 - 4023
• 0.1 A: 2056 - 2082, 4031 - 4060
You can also manually enter the motor no-load current shown on the motor test report to E4-03. Contact the motor
manufacturer for the motor test report.
Note:
The default setting of the no-load current is for a 4-pole motor recommended by Yaskawa.
■ E4-04: Motor 2 Motor Poles
No.
(Hex.)
Name Description
Default
(Range)
E4-04
(0324)
Motor 2 Motor Poles
Sets the number of poles for motor 2.
4
(2 - 120)
Auto-Tuning automatically sets E4-04 to the value input for [Number of Motor Poles].
■ 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 per-phase resistance.
The drive automatically calculates this value when Auto-Tuning completes successfully. If you cannot do Auto-
Tuning, get the test report from the motor manufacturer. To calculate the motor line-to-line resistance, use the
information shown on the motor nameplate 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
■ 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.
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