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Adjustment of Real sensorless vector
control, vector control
4
PARAMETERS
4.7.2 Excitation ratio (Pr. 854)
Decrease the excitation ratio when you want to improve efficiency under light load. (Motor magnetic noise
decreases.)
Parameter
Number
Name Initial Value Setting Range Description
854 Excitation ratio 100% 0 to 100% Set the excitation ratio under no load.
⋅ 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.
REMARKS
⋅ 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 invalid.
Sensorless
Sensorless
SensorlessSensorless
Sensorless
SensorlessSensorless
Sensorless
Sensorless
Vector
Vector
Vector
Excitation
ratio [%]
100
(initial value)
Pr. 854
set value
0 100 Load [%]