Advanced Magnetic Flux Vector Control - Mitsubishi Electric FR-E700 Instruction Manual

Adjust the output torque (current) of the motor
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.
Initial
Pr. No. Name
Value
71
Applied motor
80
Motor capacity 9999
Number of motor
81
9999
poles
Speed control gain
89
(advanced magnetic 9999
flux vector)
Control method
800
selection
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 0.2 kW
or more) or Mitsubishi constant-torque motor (SF-JRCA four-pole, SF-HRCA 0.2 kW to 15 kW).
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 30 m. (Perform offline auto tuning in
the state where wiring work is performed when the wiring length exceeds 30 m.)
● 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 3-13).
6 - 38
Setting Range Description
By selecting a standard motor or constant-torque motor,
0/1/3–6/13–16/
0 23/24/40/43/44/ thermal characteristic and motor constants of each motor
50/53/54
are set.
0.1–15 kW Set the applied motor capacity.
9999 V/F control
2/4/6/8/10 Set the number of motor poles.
9999 V/F control
Motor speed fluctuation due to load fluctuation is
0–200% adjusted during advanced magnetic flux vector control.
100% is a referenced value.
9999 Gain matching with the motor set in Pr. 71.
20
Advanced magnetic flux vector control
20
30
General-purpose magnetic flux vector control
AD MFVC AD MFVC AD MFVC
Parameters referred to
Parameter
Refer to
Section
71 Applied motor 6.8.2
450 Second applied 6.8.2
motor
800 Control method 6.2.1
selection