Mitsubishi FR-A846-00023, Instruction Manual

Page: 151 / 156

150
APPENDIX
10
Motor induced voltage constant (PM motor)
• For PM motors, set
Pr.1412 Motor induced voltage constant (phi f) exponent
or
Pr.1413 Second motor induced voltage constant (phi
f) exponent
to set a motor induced voltage constant (phi f) exceeding the setting range, 0 to 5000 mV (rad/s), of
Pr.706 Motor induced
voltage constant (phi f)
or
Pr.738 Second motor induced voltage constant (phi f)
.
Set a value in the exponent n in the formula, Pr.706 (Pr.738) × 10
n
[mV/(rad/s)], to set the induced voltage constant (phi f).
When
Pr.71 (Pr.450)
= "8093, 8094, 9093, or 9094", or
Pr.1412 (Pr.1413)
= "9999", the motor induced voltage constant is as set in
Pr.706
(Pr.738)
. (No exponent setting)
11
Plug-in option compatibility
 FR-A8NF
• When the plug-in option FR-A8NF is installed, FL remote communication is supported.
 FR-A8NS
• When the plug-in option FR-A8NS is installed, SSCNET III/H communication is supported.
The settings in Pr.290 Monitor negative output selection and Pr.1018 Monitor with sign selection are now valid during
SSCNET III/(/H) communication using the FR-A8NS.
 FR-A8APS
• Installing the plug-in option FR-A8APS enables vector control with an EnDat interface encoder.
• For setting the motor induced voltage constant, the exponent used in the calculation can be set.
Pr. Name
Initial
value
Setting
range
Description
1412
C135 Motor induced voltage
constant (phi f) exponent
9999
0 to 2
Set the exponent n when the induced voltage constant phi f
(
Pr.706
) is multiplied by 10
n
.
9999 No exponent setting
1413
C235
Second motor induced
voltage constant (phi f)
exponent
9999
0 to 2
Set the exponent n when the induced voltage constant phi f
(
Pr.738
) is multiplied by 10
n
.
9999 No exponent setting
• The plug-in option FR-A8NF, FR-A8NS, and FR-A8APS are supported.