Advanced Magnetic Flux Vector Control (Pr. 71, Pr. 80, Pr. 81, Pr. 89, Pr. 450, Pr. 451, Pr. 453, Pr. 454, Pr. 569, Pr. 800) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Adjustment of the output torque
(current) of the motor
4.8.2 Advanced magnetic flux vector control (Pr. 71, Pr. 80, Pr. 81, Pr. 89, Pr. 450,
Pr. 451, Pr. 453, Pr. 454, Pr. 569, Pr. 800)
Advanced magnetic flux vector control can be selected by setting the capacity, number and type of motor to be
used in Pr. 80 and Pr. 81.
What is Advanced magnetic flux vector control?
The low speed torque can be improved by providing voltage compensation to flow a motor current which meets
the load torque. Output frequency compensation (slip compensation) is made so that the motor actual speed
approximates a speed command value. Effective when load fluctuates drastically, etc.
Parameter
Name
Number
71 Applied motor
80 Motor capacity
81 Number of motor poles
Speed control gain
89 (Advanced magnetic flux
vector)
450 Second applied motor
Second motor control
451
*2
method selection
453 Second motor capacity
*2
Number of second motor
454
*2
poles
Second motor speed
569
*2
control gain
800 Control method selection
*1 Use Pr. 178 to Pr. 189 to assign the terminals used for the X18 and MC signal. (Refer to page 231 )
Valid when Pr. 450 ≠ "9999".
*2
POINT
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. (note that the capacity should
be 0.4kW or higher)
• Motor to be used is either Mitsubishi standard motor (SF-JR 0.4kW or higher), Mitsubishi high efficiency motor
(SF-HR 0.4kW or higher) or Mitsubishi constant torque motor (SF-JRCA 4P, SF-HRCA 0.4kW to 55kW). When
using a motor other than the above (SF-TH, other manufacturer's motors, etc.), 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.)
• For 75K or higher, do not use an option sine wave filter (MT-BSL/BSC) between the inverter and motor.
148
Magnetic flux Magnetic flux Magnetic flux
Initial
Setting Range
Value
0 to 8, 13 to 18,
0 20, 23, 24, 30, 33, 34, 40,
43, 44, 50, 53, 54
55K or lower 0.4 to 55kW
9999 75K or higher 0 to 3600kW
9999
2, 4, 6, 8, 10
9999 12, 14, 16, 18, 20
9999
0 to 200%
9999
9999
0 to 8, 13 to 18,
20, 23, 24, 30, 33, 34, 40,
9999
43, 44, 50, 53, 54
9999
10, 11, 12
9999
20, 9999
55K or lower 0.4 to 55kW
9999 75K or higher 0 to 3600kW
9999
2, 4, 6, 8, 10
9999
9999
0 to 200%
9999
9999
0 to 5
9
20
10, 11, 12
20
Description
By selecting a standard motor or constant
torque motor, thermal characteristic and motor
constants of each motor are set.
Set the applied motor capacity.
V/F control
Set the number of motor poles.
X18 signal-ON:V/F control
*1
V/F control
Motor speed fluctuation due to load fluctuation
is adjusted during Advanced magnetic flux
vector control.
100% is a referenced value.
Gain matching with the motor set in Pr. 71.
Set when using the second motor.
(same specifications as Pr. 71 )
Function invalid (Pr. 71 is valid)
Real sensorless vector control
V/F control (Advanced magnetic flux vector
control)
Set the capacity of the second motor.
V/F control
Set the number of poles of the second motor.
V/F control
Second motor speed fluctuation due to load
fluctuation is adjusted during Advanced
magnetic flux vector control.
100% is a referenced value.
Gain matching with the motor set in Pr. 450.
Vector control
Vector control test operation
Real sensorless vector control
V/F control (Advanced magnetic flux vector control)
Set 10 + number
of motor poles.