5.5 E: Motor Parameters
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 217
E2-02: Motor Rated Slip
Sets the motor rated slip in Hz to provide motor control, protect the motor and calculate torque limits. This value is
automatically set during Auto-Tuning (Rotational Auto-Tuning, Stationary Auto-Tuning 1 and 2).
If Auto-Tuning cannot be performed, calculate the motor rated slip using the information written on the motor nameplate
and the formula below:
E2-02 = f - (n p)/1
20
(f: rated frequency (Hz), n: rated
motor speed (min
-1
), p: number of motor poles)
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 1, 2). 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-A2A0004 to 2A0040, CIMR-A4A0002 to 4A0023: 0.01 A units
CIMR-A2A0056 to 2A0312, CIMR-A4A0031 to 4A0675: 0.1 A units
CIMR-A4A0930 to 4A1200: 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 contac
t 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
() listed on the test report at 75°C
• B-type insulation: Multiply 0.92
times the resistance value () listed on the test report at 75°C.
• F-type insulation: Multiply 0.87 times t
he resistance value () 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 1, 2).
No. Parameter Name Setting Range Default
E2-02 Motor Rated Slip 0.00 to 20.00 Hz
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E2-03 Motor No-Load Current
0 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. Parameter Name Setting Range Default
E2-05
<1> The units are expressed in m for models CIMR-A4A0930 and 4A1200.
Motor Line-to-Line Resistance 0.000 to 65.000 <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
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