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Acquiring large starting torque and low speed torque (Advanced magnetic flux vector control, General-purpose magnetic flux vector control) (Pr. 71, Pr. 80, Pr. 81, Pr. 800)
5
5.3.1 Selection method of Advanced magnetic flux vector control
Perform secure wiring.
(Refer to page 9)
Set the motor. (Pr. 71)
Motor Pr. 71 Setting ∗1 Remarks
Mitsubishi standard
motor
Mitsubishi high
efficiency motor
SF-JR 0 (initial value)
SF-HR 40
Others 3
Offline auto tuning is necessary.
∗1
Mitsubishi constant-
torque motor
SF-JRCA 4P 1
SF-HRCA 50
Others (SF-JRC, etc.) 13
Offline auto tuning is necessary.
∗1
Other manufacturer's
standard motor
— 3 Offline auto tuning is necessary. ∗1
Other manufacturer's
constant-torque
motor
—
13
Offline auto tuning is necessary.
∗1
∗1 Refer to Chapter 4 of the Instruction Manual (Applied) for other settings of Pr. 71 and offline auto tuning.
Set the motor capacity and the number of motor poles.
(Pr. 80, Pr. 81) (Refer to page 28)
Set motor capacity (kW) in Pr. 80 Motor capacity and
the number of motor poles (number of poles) in Pr. 81 Number of motor poles.
(V/F control is performed when the setting is "9999" (initial value).
Select the control method. (Pr. 800) (Refer to page 28)
Set "20" (initial value) in Pr. 800 to make Advanced magnetic flux vector control
valid.
Set the operation command. (Refer to page 21)
Select the start command and speed command.
(1)Start command
1)Operation panel: Setting by pressing of the operation panel
2)External command: Setting by forward rotation or reverse rotation
command (terminal STF or STR)
(2)Speed command
1)Operation panel: Setting by pressing of the operation panel
2)External analog command (terminal 2 or 4):
Give a speed command using the analog signal input to terminal 2 (or
terminal 4).
3)Multi-speed command:
The external signals (RH, RM, RL) may also be used to give speed
command.
Test run
As required
y Perform offline auto tuning. (Pr. 96) ( Refer to Chapter 4 of the Instruction Manual (Applied))
NOTE
y Uneven rotation slightly increases as compared to the V/F control. (It is not suitable for machines such as grinding
machine and wrapping machine which requires less uneven rotation at low speed.)
y When a surge voltage suppression filter (FR-ASF-H/FR-BMF-H) is connected between the inverter and motor, output
torque may decrease.
REMARKS
y Use Pr. 89 to adjust the motor speed fluctuation at load fluctuation. ( Refer to Chapter 4 of the Instruction Manual (Applied).)