Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Adjustment of real sensorless vector control, vector control Parameter
6 - 146
6.6.2 Excitation ratio
Decrease the excitation ratio when you want to improve efficiency under light load. (Motor
magnetic noise decreases.)
Note that the rise of output torque becomes slow if excitation ratio is decreased. This function
is appropriate for applications as machine tools which repeat rapid acceleration/deceleration up
to high speed.
Pr.
No.
Name
Initial
Value
Setting Range Description Parameters referred to
Refer to
Section
854
Excitation ratio 100% 0–100%
Set the excitation ratio under no
load.
—
I001543E
Fig. 6-44: Setting of the excitation ratio
NOTE
When "1" (magnetic flux with terminal) is set in Pr. 858 "Terminal 4 function assignment" or
Pr. 868 "Terminal 1 function assignment", the Pr. 854 setting is made invalid.
Sensorless Sensorless Sensorless Vector Vector Vector
Excitation ratio [%]
100
(initial value)
Pr. 854
set value
0 100% Last [%]