Adjusting The Motor Wiring Resistance (Pr.658) - Mitsubishi Electric FR-E700EX Instruction Manual

4.4.8

Adjusting the motor wiring resistance (Pr.658)

Adjust if acceleration/deceleration characteristics are unstable. In normal condition, setting is not required.
Parameter
Name
number
658
Wiring resistance
.......Specifications differ according to the date assembled. Refer to page 316 to check the SERIAL number.
 The motor wiring resistance can be set. The set value is calculated according to the following formula.
Wiring resistance = Resistance per 1 m ()  Wiring length (m)
Reference value
Cable size
HIV cables, etc.
AWG
2
(mm )
0.75 19
0.75 18
2 14
 For special size cables, the value is calculated according to the following formula.
R()=  
(: constant 1.7241  10
A
Initial
Setting range
value
0 to 5 
9999
9999
Resistance
per 1 m () 1 m
0.029100 0.029 0.058
0.021800 0.022 0.044
0.008573 0.009 0.017
-2 2
(mm /m) (copper wire), A: cross section area (mm
Description
Set the motor wiring resistance. PM sensorless vector control is
performed with the set resistance value.
The motor wiring resistance calculated by the drive unit is set. PM
sensorless vector control is performed with the calculated
resistance value.
Resistance in the wiring length ()
2 m 5 m 10 m
0.146 0.291
0.109 0.218
0.043 0.086
Speed control
20 m 30 m
0.582 0.873
0.436 0.654
0.171 0.257
2
), : length (m))
87
4