Energy Saving Operation And Energy Saving Monitor; Energy Saving Control And Optimum Excitation Control (Pr.60) - Mitsubishi Electric F700 Instruction Manual

Energy saving operation and energy saving monitor

3.13 Energy saving operation and energy saving monitor
Purpose
Energy saving operation
How much energy can be saved

3.13.1 Energy saving control and optimum excitation control (Pr.60)

Without a fine parameter setting, the inverter automatically performs energy saving operation.
Pr. 59
This inverter is optimum for fan and pump applications
page 72
Pr. 65
page 114
Parameter
Number
60 Energy saving control selection
(1) Energy saving operation mode (Setting "4")
⋅ When "4" is set in Pr. 60, the inverter operates in the energy saving operation mode.
⋅ In the energy saving operation mode, the inverter automatically controls the output voltage to minimize the
inverter output voltage during a constant operation. This inverter is appropriate for machines, such as a fan and
a pump, which operate for long hours at a constant speed.
REMARKS
⋅ When the energy saving mode is selected, the Pr. 0 Torque boost and Pr. 14 Load pattern selection settings are made invalid to
automatically control the output voltage.
⋅ For applications a large load torque is applied to or machines repeat frequent acceleration/deceleration, an energy saving
effect is not expected.
(2) Optimum excitation control mode (Setting "9")
⋅ 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. More energy saving is
expected for the machines whose moment of inertia (J) is large and acceleration/deceleration time is long.
REMARKS
⋅ 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.
CAUTION
⋅ When the energy saving mode and optimum excitation control mode are 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.
⋅ The energy saving operation mode and optimum excitation control function only for V/F control. When a value other than
"9999" is set in Pr. 80 Motor capacity (simple magnetic flux vector control), the energy saving mode and optimum excitation
control does not function.
♦ Parameters referred to
Pr.0 Torque boost
Pr.14 Load pattern selection
Pr.80 Motor capacity (simple magnetic flux vector control)
118
Energy saving operation
and optimum excitation
control
Energy saving monitor
Name
Refer to page 53
Refer to page 60
Parameter that must be set
Initial Value Setting Range
0
0 4
9
Refer to page 54
Pr.60
Pr.52, Pr54, Pr.158,
Pr.891 to Pr.899
Description
Normal operation mode
Energy saving operation mode
Optimum excitation control mode
Refer to
Page
118
119