5-97
P06 to P08 Motor 1 (No-load current, %R1 and %X)
P06 through P08 specify no-load current, %R1 and %X, respectively. Obtain the appropriate values from the test report
of the motor or by calling the manufacturer of the motor.
Performing auto-tuning automatically sets these parameters.
No-load current (P06)
Enter the value obtained from the motor manufacturer.
%R1 (P07)
Enter the value calculated by the following expression.
(%) 100×
)I×3(/V
R1CableR1
%R1
+
=
where,
R1: Primary resistance of the motor (Ω)
Cable R1: Resistance of the output cable (Ω)
V: Rated voltage of the motor (V)
I: Rated current of the motor (A)
%X (P08)
Enter the value calculated by the following expression.
(%) 100×
)I×3(/V
XCableXM)(X2/XM×X2X1
%X
+++
=
where,
X1: Primary leakage reactance of the motor (Ω)
X2: Secondary leakage reactance of the motor (converted to primary) (Ω)
XM: Exciting reactance of the motor (Ω)
Cable X: Reactance of the output cable (Ω)
V: Rated voltage of the motor (V)
I: Rated current of the motor (A)
For reactance, use the value at the base frequency (F04).
P09 to P11 Motor 1 (Slip compensation gain for driving, Slip compensation response time, and
Slip compensation gain for braking)
P09 and P11 determine the slip compensation amount in % for driving and braking individually and adjust the slip
amount from internal calculation. Specification of 100% fully compensates for the rated slip of the motor. Excessive
compensation (P09, P11 > 100%) may cause hunting (undesirable oscillation of the system), so carefully check the
operation on the actual machine.
For Fuji motors exclusively designed for vector control, the rated slip of the motor for driving or braking is
compensated by P09 or P11, respectively, to improve output torque accuracy.
P10 determines the response time for slip compensation. Basically, there is no need to modify the default setting. If you
need to modify it, consult your Fuji Electric representatives.
Function codes Operation (Slip compensation)
P09 Slip compensation gain for driving Adjust the slip compensation amount for driving.
Slip compensation amount for driving =
Rated slip x Slip compensation gain for driving
P11 Slip compensation gain for braking Adjust the slip compensation amount for braking.
Slip compensation amount for braking =
Rated slip x Slip compensation gain for braking
P10 Slip compensation response time Specify the slip compensation response time. Basically, there is
no need to modify the default setting.
For details about the slip compensation control, refer to the description of F42.
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