Mitsubishi Electric FR-A820-00046 Instruction Manual page 618

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(C) Motor constant parameters
Automatic change of torque boost for the SF-PR motor
When the SF-PR motor is selected (Pr. 71 = "70, 73, or 74"), the Pr. 0 "Torque boost" setting is auto-
matically changed to enable output of the 6 Hz 150% torque under V/F control by setting Pr. 81 "Num-
ber of motor poles" according to the number of the SF-PR motor poles.
NOTES
When using the SF-PR heavy duty setting, set Pr. 14 "Load pattern selection" = "0".
When the Pr. 0 setting is changed from its initial value, the automatic change is not performed.
Automatic change of Pr. 0 "Torque boost" and Pr. 12 "DC injection brake operation voltage"
When initial values are set in Pr. 0 and Pr. 12, the Pr. 0 and Pr. 12 settings are automatically changed to
the values in the table below by changing the Pr. 71 setting.
Inverter
FR-A820-„
FR-A840-„
00046(0.4K)
00023(0.4K)
00077(0.75K) 00038(0.75K)
00105(1.5K)
00052(1.5K)
00167(2.2K)
00083(2.2K)
00250(3.7K)
00126(3.7K)
00340(5.5K)
00170(5.5K)
00490(7.5K)
00250(7.5K)
00630(11K)
00310(11K)
00770(15K)
00380(15K)
00930(18.5K) 00470(18.5K)
01250(22K)
00620(22K)
01540(30K)
00770(30K)
01870(37K)
00930(37K)
02330(45K)
01160(45K)
03160(55K)
01800(55K)
03800(75K)
02160(75K)
or higher
or higher
Tab. 5-173:
Automatic change of Pr. 0 and Pr. 12 by changing Pr. 71 setting
When changed to Pr. 71 = "0, 2 to 6, 20, 23, 24, 40, 43, or 44" (standard motor)
When changed to Pr. 71 = "1, 13 to 16, 50, 53, or 54" (constant-torque motor)
When changed to Pr. 71 = "70, 73, or 74" (SF-PR)
NOTES
When the Pr. 0 and Pr. 12 settings are changed from their initial values, automatic change is not
performed.
When the SF-PR motor is selected (Pr. 71="70, 73, or 74"), the output current may become large
due to a small load by setting Pr.81 Number of motor poles according to the number of the SF-PR
motor poles.
5 - 438
Pr. 0 value (%) after automatic change
Standard
Constant-torque
motor
motor
SLD/LD
ND/HD
SLD/LD
6
6
6
6
4
4
4
4
4
4
3
2
3
2
2
2
2
2
2
2
2
2
2
2
2
2
1.5
2
1.5
1.5
2
1.5
1
1
Motor
SF-PR
Pr. 81
Pr. 81
ND/HD
≠ 2, 4, 6
= 2
4
4
4
7.4
3
5.8
2.5
6
2.5
6.4
2
4.5
2
4.4
1.5
3.5
1.5
4.5
1.5
4
1.5
2.5
1
3
1
2
2
1
2
2
0.7
2
1
1
Pr. 12 value (%) after
automatic change
Pr. 81
Pr. 81
= 4
= 6
4
4
4
6
6.4
4
5
3.7
4
4.5
3.3
4
4.5
4.2
4
3.7
3.3
4
4.5
3.8
4
3.3
3.5
2
3
3.5
2
3.2
3
2
3.4
3
2
2
2.5
2
2.5
2.6
2
2
2.4
2
2
0.7
2
1
1
1
Parameters
SF-PR
4
4
4
4
4
2.5
4
2.5
4
2.5
2
2
2
2
2
1.5
2
1.5
2
1.5
2
1
2
1
2
1
2
1
2
1
1
1

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