Mitsubishi Electric F700 Instruction Manual download pdf (Page 60)

Energy saving operation (Pr. 60)

ADJUSTMENT

4.5 Energy saving operation (Pr. 60)

4.5.1 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.

4.5.2 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.

Without a fine parameter setting, the inverter automatically performs energy saving operation.

This inverter is appropriate for fan and pump applications

Parameter

Number

Name

Initial

Value

Setting

Range

Remarks

60 Energy saving control selection

0 Normal operation mode

4 Energy saving operation mode

9 Optimum excitation control mode

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.

REMARKS

· 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.

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 mode and optimum excitation control functions only under V/F control.

When a value other than "9999" is set in Pr. 80 Motor capacity (simple magnetic flux control), the energy saving mode and

optimum excitation control does not function.

(For simple magnetic flux vector control, refer to the Instruction Manual (applied).)

POINT

When you want to check the energy saving effect, refer to the Instruction Manual (applied) to check the energy

saving effect monitor.

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Mitsubishi Electric F700 Instruction Manual Page 60

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