Energy saving operation and energy saving monitor
4.15 Energy saving operation and energy saving monitor
Energy saving operation
How much energy can be saved
4.15.1 Optimum excitation control (Pr. 60)
Without a fine parameter setting, the inverter automatically performs energy saving operation.
This operation is optimum for fan and pump applications
Energy saving control
The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 197)
* When parameter is read using the FR-PU04, a parameter name different from an actual parameter 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 improve the motor efficiency
to maximum and determines output voltage as an energy saving method.
When the motor capacity is too small as compared to the inverter capacity or two or more motors are connected to one 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
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.
Parameters referred to
Pr. 57 Restart coasting time
Optimum excitation control
Energy saving monitor
Refer to page 161
Parameter that should be Set
Pr. 52, Pr. 54, Pr. 158,
Pr. 891 to Pr. 899
Refer to Page
Normal operation mode
Optimum excitation control mode