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20
. COMBINATION WITH THE INVERTER
Where you use the V/F control of an 800 series inverter and a 700 series inverter to drive the motor, follow the
procedure below to define the parameters.
(1) Where generating the output of 150% torque (maximum torque for a short period of time) at output
frequency of 6Hz is not required:
<Where using an 800 series inverter>
a. Set Pr.14 "the selection of applied load" to "0 (factory setting)". (For constant torque load setting)
b. Set Pr.71 "the applicable motor" to either "70, 73 or 74". (SF-PR motor setting)
c. Set Pr.81 "the motor pole" to "9999 (factory setting)". (Setting of Pr.81 ≠ 2, 4, 6)
d. The system automatically sets a value from Table 18 to Pr.0 "torque boost". Note that if Pr.0 "torque boost" is
altered from the initial setting, no automatic setting occurs.
Table 18 Table of setting values [Common to 200VAC and 400VAC classes: Where generating output of
6Hz, 150% torque (maximum torque for a short period of time) is not required.]
Output
Type
(kW)
0.75
1.5
2.2
3.7
5.5
7.5
11
SF-PR
15
18.5
22
30
37
45
55
<Where using a 700 series inverter>
a. Set Pr.14 "the selection of applied load" to "0 (factory setting)". (For constant torque load setting)
b. Set Pr.71 "the applicable motor" to "1". (constant torque motor setting)
c. Set a value from Table 19 to Pr.0 "torque boost".
Table 19 Table of setting values [Common to 200VAC and 400VAC classes: Where generating the output of
6Hz, 150% torque (maximum torque for a short period of time) is not required.]
Output
Type
(kW)
0.75
1.5
2.2
3.7
5.5
7.5
11
SF-PR
15
18.5
22
30
37
45
55
(Note) When operating an SF-PR type premium efficiency motor (IE3), its output current tends to increase compared to a standard efficiency motor
(IE1) and a high efficiency motor (IE2). Even if operating to the torque boost value recommended by Mitsubishi Electric, the output current
may still increase depending on the loading condition. If the protection devices such as an electronic thermal relay (E.THT, E.THM), a stall
prevention device (OL, E.OLT) or other protective function activates, adjust the Pr.0 torque boost setting depending on the load.
Parameter setting
Pr.0 "torque boost (%)"
Pr.81=9999
(Pr.81 ≠ 2,4,6)
4.0
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.5
1.5
1.0
1.0
1.0
0.7
Parameter setting
Pr.0 "torque boost (%)"
Number of poles: 2, 4, 6
4.0
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.5
1.5
1.0
1.0
1.0
0.7
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