Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 598 / 727

(G) Control parameters
PARAMETERS
597
5
GROUP
G
5.16.5
Energy saving control

Energy saving operation (setting "4")
• Setting Pr.60 = "4" will select the energy saving operation.
• With the energy saving operation, the inverter will automatically control the output voltage so the inverter output power
during the constant-speed operation will become minimal.
• Energy saving operation will be enabled under V/F control.

Optimum excitation control (setting "9")
• Setting Pr.60 = "9" will select the Optimum excitation control.
• The Optimum excitation control is a control method to decide the output voltage by controlling the excitation current so the
efficiency of the motor is maximized.
• Optimum excitation control will be enabled under V/F control and Advanced magnetic flux vector control.
NOTE
• An energy saving effect is not expected with the energy saving operation mode for applications with high load torque or with
the equipment with frequent acceleration and deceleration.
• An energy saving effect is not expected with the Optimum excitation control mode when the motor capacity is extremely small
compared with the inverter capacity or when multiple motors are connected to a single inverter.
• When the energy saving operation mode or Optimum excitation control mode is selected, the deceleration time may become
longer than setting value. Also, it may cause overvoltage more often compared to constant-torque load characteristics, so set
the deceleration time longer.
• When the motor becomes unstable during the acceleration, set the acceleration time longer.
• Output current may increase slightly with the energy saving operation mode or the Optimum excitation control mode since the
output voltage is controlled.
Inverter will perform energy saving control automatically even when the detailed parameter settings are made.
It is appropriate for applications such as fan and pump.
Pr. Name
Initial
value Setting
range
Description
60
G030 Energy saving control
selection
0
0 Normal operation
4 Energy saving operation
9 Optimum excitation control
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux