Mitsubishi Electric fr-e700 series, Instruction Manual

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Energy saving operation Parameter
6 - 174
6.14 Energy saving operation
6.14.1 Optimum excitation control (Pr. 60)
Without a fine parameter setting, the inverter automatically performs energy saving operation.
This inverter is optimum for fan and pump applications.
The above parameters can be set when Pr. 160 "User group read selection" = 0.
햲
When parameter is read using the FR-PU04, a parameter name different from an actual parame-
ter is displayed.
When "9" is set in Pr. 60, the inverter operates in the optimum excitation control mode.
The optimum excitation control mode is a control system which controls excitation current to im-
prove the motor efficiency to maximum and determines output voltage as an energy saving method.
Purpose Parameters that must be set
Refer to
Section
Energy saving operation Energy saving operation and optimum
excitation control Pr. 60 6.14.1
Pr. No. Name Initial Value
Setting
Range
Description Parameters referred to
Refer to
Section
60
Energy saving control
selection
햲
0
0 Normal operation mode
57
Advanced magnetic
flux vector control
General-purpose
magnetic flux vector
control
Restart coasting time 6.3.2
6.3.3
6.12.1
9 Optimum excitation control mode
NOTES
When the motor capacity is too small as compared to the inverter capacity or two or more motors
are connected to the inverter, the energy saving effect is not expected.
When the optimum excitation control mode is selected, deceleration time may be longer than the
setting value. Since overvoltage alarm tends to occur as compared to the constant torque load
characteristics, set a longer deceleration time.
Optimum excitation control functions only under V/F control. Optimum excitation control does
not function under advanced magnetic flux vector control and general-purpose magnetic flux
vector control.
Optimum excitation control will not be performed during an automatic restart after instantaneous
power failure.
Since output voltage is controlled by optimum excitation control, output current may slightly
increase.
V/F V/F V/F