Advanced Magnetic Flux Vector Control (Pr. 71, Pr. 80, Pr. 81, Pr.89, Pr. 800) - Mitsubishi Electric FR-E720-008 Instruction Manual

4.4.2

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 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.
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. (Refer to page 88)
Parameter
Name
Number
71 Applied motor
80 Motor capacity
Number of motor
81
poles
Speed control gain
(Advanced
89
magnetic flux
vector)
Control method
800
selection
The above parameters can be set when Pr. 160 User group read selection = "0".(Refer to page 187)
∗ Set a value other than "9999" in Pr. 80 and Pr. 81.
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 0.1kW or more.)
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 (98.42feet). (Perform offline auto tuning in the
state where wiring work is performed when the wiring length exceeds 30m (98.42feet).)
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 21 for the permissible wiring length.
Adjustment of the output torque (current) of the motor
Initial
Setting Range
Value
0,1, 3 to 6,
13 to 16, 23, 24
0
40, 43, 44
50, 53, 54
0.1 to 15kW
9999
9999
2, 4, 6, 8, 10
9999
9999
0 to 200%
9999
9999
20
20
30
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.
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.
Advanced magnetic flux vector control ∗
General-purpose magnetic flux vector control ∗ (Refer to
page 88)
AD MFVC AD MFVC AD MFVC
4
85