Simple Magnetic Flux Vector Control (Pr. 80, Pr. 90) - Mitsubishi Electric FR-F740 EC Instruction Manual

Motor torque
6.2.2

Simple magnetic flux vector control (Pr. 80, Pr. 90)

Providing optimum excitation to the motor can also produce high torque in a low-speed range.
(Simple magnetic flux vector control)
Pr.
Name
No.
80
Motor capacity
90
Motor constant (R1)
The above parameters can be set when Pr. 160 = 0.
Following conditions must be satisfied to perform simple magnetic flux vector control:
● The number of motor poles should be any of 2, 4 and 6 poles.
● Single-motor operation (One motor for one inverter).
● The wiring length from inverter to motor should be within 30m.
Automatically control optimum torque (Pr. 80)
When simple magnetic flux vector control is not used, set "9999" (initial value) in Pr.80.
Set the used motor capacity (equal to or one rank higher than the inverter capacity).
NOTES
When using a constant-torque motor, set Pr. 71 "Applied motor" to "1" (constant-torque
motor).
When simple magnetic flux vector control is selected, the rated motor frequency is set in Pr.
3 and the rated motor voltage is set in Pr. 19. The base frequency voltage is handled as
400V when "9999" or "8888" is set in Pr. 19.
Adjustable 5 points V/f, energy saving operation mode, optimum excitation control function
only under V/F control. They do not function for simple magnetic flux vector control.
Set the motor constant (Pr. 90)
Normally setting is not necessary. When you need more torque under simple magnetic flux vec-
tor control for other manufacturer's motor, set the motor primary resistance value (R1) for star
connection. When the setting value is "9999" (initial value), the motor constant is based on the
Mitsubishi motor constant (SF-JR, SF-HRCA).
6 - 42
Initial
Setting Range
Value
01160
0.4–55kW Set the capacity of the motor
or more
9999 01800
0–3600kW
or more
9999
01160
0–50Ω
or less
01800
9999 0–400mΩ
or more
9999
Description
used to select simple magnetic
flux vector control.
V/f control is performed
Used to set the motor primary
resistance value. (Normally set-
ting is not necessary.)
Use the Mitsubishi motor
(SF-JR, SF-HRCA) constants
Parameter
Parameters referred to
3 Base frequency
19 Base frequency
voltage
60 Energy saving
control selection
71 Applied motor
77 Parameter write
selection
Refer to
Section
6.4.1
6.4.1
6.13.1
6.7.2
6.16.2