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E2: Motor Parameters
These parameters are set automatically when Auto-Tuning is performed for Open Loop Vector Control. If Auto-Tuning is possible, then these parameters
can also be set manually.
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E2-01: Motor Rated Current
The motor rated current parameter E2-01 is used by the drive to protect the motor for proper performance of Open Loop Vector Control (A1-02 = 2). Set
E2-01 to the full load amps (FLA) stamped on the motor nameplate. During Auto-Tuning, the technician must enter the motor rated current to parameter
T1-04. If Auto-Tuning completes successfully, the value entered into T1-04 will automatically be saved to E2-01.
No. Parameter Name Setting Range Default
E2-01 Motor Rated Current Between 10 to 200% of the drive rated current. Determined by o2-04
Note: Set the lower and higher digits to the value corresponds to the capacity of the drive: 11 kW or less: Sets the lower 2 digits, 11 kW or higher: Set to the lowest digit
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E2-02: Motor Rated Slip
Sets the motor rated slip in Hz. This value is automatically set during rotational Auto-Tuning.
No. Parameter Name Setting Range Default
E2-02 Motor Rated Slip 0.00 to 20.00 Determined by o2-04
Calculate the motor rated slip using the information written on the motor nameplate and the formula below:
fs = f - (N x P) / 120
fs: slip frequency (Hz)
f: rated frequency (Hz)
N: rated motor speed (r/min)
P: number of motor poles
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E2-03: Motor No-Load Current
Set E2-03 to the motor no-load current at rated voltage and rated frequency. If Rotational Auto-Tuning completes successfully, this value is automatically
calculated. Consult with the motor manufacturer for the proper value if the no-load current is not stated on the motor nameplate.
No. Name Setting Range Default
E2-03 Motor No-Load Current Between 0 and [E2-01] Determined by o2-04
Note: Set the lower and higher digits to the value corresponds to the capacity of the drive: 11 kW or less: Sets the lower 2 digits, 11 kW or higher: Set to the lowest digit
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E2-04: Number of Motor Poles
Set the number of motor poles to E2-04. During Auto-Tuning, the technician needs to enter the number of motor poles to parameter T1-06. If Auto-Tuning
completes successfully, the value entered into T1-06 will automatically be saved to E2-04.
No. Name Setting Range Default
E2-04 Number of Motor Poles 2 to 48 4 poles
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E2-05: Motor Line-to-Line Resistance
Sets the line-to-line resistance of the motor’s stator winding. If the Auto-tuning completes successfully, this value is automatically calculated. Remember
this value must be entered as line-line and not line-neutral.
No. Parameter Name Setting Range Default
E2-05 Motor Line-to-Line Resistance 0.000 to 65.000 Determined by o2-04
Note: The setting range becomes 0.00 to 130.00 when using less than a 0.2 kW motor.
If Auto-Tuning is not possible, then contact the motor manufacturer to find out the line-to-line resistance. The resistance between lines can also be calculated
using the formula below. This data can be obtained from the Motor Test Report.
• E-type insulation: Multiply 0.92 times the resistance value (W) listed on the Test Report at 75°C
• B-type insulation: Multiply 0.92 times the resistance value (W) listed on the Test Report at 75°C.
• F-type insulation: Multiply 0.87 times the resistance value (W) listed on the Test Report at 115°C.
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E2-06: Motor Leakage Inductance
Sets the voltage drop due to motor leakage inductance as a percentage of motor rated voltage. If Rotational Auto-Tuning completes successfully, then this
value is automatically calculated.
No. Parameter Name Setting Range Default
E2-06 Motor Leakage Inductance 0.0 to 40.0 Determined by o2-04
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E2-07: Motor Iron-Core Saturation Coefficient 1
This parameter sets the motor iron saturation coefficient at 50% of the magnetic flux. If Rotational Auto-Tuning completes successfully, then this value
is automatically calculated.
5.5 E: Motor Parameters
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
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Parameter Details
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