5.5 E: Motor Parameters
198 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Figure 5. 53
Figure 5.53 V/f Pattern
Note: 1. The following condition must be true when setting up the V/f pattern: E1-09 ≤ E1-07 < E1-06 ≤ E1-11 ≤ E1-04
2. To make the V/f pattern a straight line below E1-06, set E1-09 = E1-07. In this case the E1-08 setting is disregarded.
3. E1-03 is unaffected when the parameters are initialized using parameter A1-03, but the settings for E1-04 through E1-13 are returned
to their default values.
4. Parameters E1-11, E1-12, and E1-13 should only be used to fine-tune the V/f pattern in the constant output range. These parameters
rarely need to be changed.
◆ E2: Motor 1 Parameters
These parameters contain the motor data needed for motor 1. They are set automatically when Auto-Tuning is performed
(this includes Rotational Auto-Tuning, Stationary Auto-Tuning 1 and 2). If Auto-Tuning cannot be performed, then
manually enter the motor data directly to these parameters.
Note: As the motor parameters for a PM motor are set up in the E5- parameters, parameters for induction motors (E2-) are
hidden when a PM motor control mode is selected for motor 1 (i.e., parameter A1-02 is set to 5, 6, or 7).
■ E2-01: Motor Rated Current
Set E2-01 to the full load amps (FLA) stamped on the motor nameplate. This value is used for motor protection and to
calculate torque limits. If Auto-Tuning completes successfully, the value entered to T1-04 will automatically be saved to
E2-01.
Note: This value's number of decimal places depends on the drive model and the Heavy/Normal duty selection in parameter C6-01.
The value will have two decimal places (0.01 A) if the drive is set for a Maximum Applicable Motor Capacity up to 11 kW (refer
to Table A.2 and Table A.3) and one decimal place (0.1 A) if the set Maximum Applicable Motor Capacity is higher than 11 kW.
Note: If the motor rated current in E2-01 is set lower than the motor no-load current in E2-03, than a parameter setting error will occur
(oPE02). E2-03 must be set correctly to prevent this error.
■ E2-02: Motor Rated Slip
Sets the motor rated slip in Hz. The setting in E2-02 is used for motor protection and to 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)/120
(f: rated frequency (Hz), n: rated motor speed (r/min), p: number of motor poles)
No. Parameter Name Setting Range Default
E2-01 Motor Rated Current 10% to 200% of the drive rated current.
Determined by C6-01 and
o2-04
No. Parameter Name Setting Range Default
E2-02 Motor Rated Slip 0.00 to 20.00 Hz
Determined by C6-01 and
o2-04
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