Selection and protection of a motor Parameter
6 - 96
To enter the Pr. 90 and Pr. 94 motor constants in [mH]
Set Pr. 71 according to the motor used:
For other settings of Pr. 71, refer to section 6.8.2.
In the parameter setting mode, read the following parameters and set desired values.
Calculate the Pr. 94 value from the following formula.
R1: Primary resistance
R2: Secondary resistance
l1: Primary leakage inductance
l2: Secondary leakage inductance
M: Excitation inductance
S: Slip
L1 = l1 + M: Primary inductance
L2 = l2 + M: Secondary inductance
Motor Pr. 71
Mitsubishi standard motor,
Mitsubishi high efficiency motor
SF-JR 0
SF-HR 40
Mitsubishi constant-torque motor
SF-JRCA 4P 1
SF-HRCA 50
Tab. 6-21: Motor selection
Fig. 6-40:
Motor equivalent circuit diagram
I001556E
Pr. 94 1
M
2
L1 L2 ×
---------------------–
⎝⎠
⎛⎞
100 [%]×=
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