Mitsubishi Electric FR-E740 SC EC Series User Manual

Adjust the output torque (current) of the motor Parameter
6 - 36
6.3.2 Advanced magnetic flux vector control
(Pr. 71, Pr. 80, Pr. 81, Pr. 89, Pr. 800)
Advanced magnetic flux vector control can be selected by setting the capacity, poles and type of the
motor used in Pr. 80 and Pr. 81.
● Advanced magnetic flux vector control?
The low speed torque can be improved by providing voltage compensation so that the motor
current which meets the load torque to flow. Output frequency compensation (slip compensa-
tion) is made so that the motor actual speed approximates a speed command value. Effective
when load fluctuates drastically, etc.
When the FR-E500 series used for general-purpose magnetic flux vector control was replaced,
select general-purpose magnetic flux vector control only when the same operation characteristic
is necessary.
The above parameters can be set when Pr. 160 "User group read selection" = 0.

Set a value other than "9999" in Pr. 80 and Pr. 81.
If the following conditions are not satisfied, select V/F control since malfunction such as insufficient
torque and uneven rotation may occur.
● The motor capacity should be equal to or one rank lower than the inverter capacity.
● Motor to be used is any of Mitsubishi standard motor, high efficiency motor (SF-JR, SF-HR 0.2kW
or more) or Mitsubishi constant-torque motor (SF-JRCA four-pole, SF-HRCA 0.2kW to 15kW). When
using a motor other than the above (other manufacturer's motor), perform offline auto tuning
without fail.
● Single-motor operation (one motor run by one inverter) should be performed.
● The wiring length from inverter to motor should be within 30m. (Perform offline auto tuning in
the state where wiring work is performed when the wiring length exceeds 30m.)
● Permissible wiring length between inverter and motor differs according to the inverter capacity
and setting value of Pr. 72 "PWM frequency selection" (carrier frequency) (refer to page 3-12).
Pr. No. Name
Initial
Value
Setting Range Description Parameters referred to
Refer to
Section
71
Applied motor 0
0/1/3–6/13–16/
23/24/40/43/44/
50/53/54
By selecting a standard motor or constant-torque motor,
thermal characteristic and motor constants of each motor
are set.
71
450
800
Applied motor
Second applied
motor
Control method
selection
6.8.2
6.8.2
6.2.1
80
Motor capacity 9999
0.1–15kW Set the applied motor capacity.
9999 V/F control
81
Number of motor
poles
9999
2/4/6/8/10 Set the number of motor poles.
9999 V/F control
89
Speed control gain
(advanced magnetic
flux vector)
9999
0–200%
Motor speed fluctuation due to load fluctuation is
adjusted during advanced magnetic flux vector control.
100% is a referenced value.
9999 Gain matching with the motor set in Pr. 71.
800
Control method
selection
20
20
Advanced magnetic flux vector control

30
General-purpose magnetic flux vector control

AD MFVC
AD MFVC
AD MFVC

Mitsubishi Electric FR-E740 SC EC Series Specifications

General

Brand	Mitsubishi Electric
Model	FR-E740 SC EC Series
Category	Inverter
Language	English