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Adjust the output torque of the motor (current)
(2) Adjust the motor speed fluctuation at load fluctuation (speed control gain)
(3) Advanced magnetic flux vector control is performed with two motors
• Turning the RT signal on allows the second motor to be controled.
• Set the second motor in
Pr. 450 Second applied motor
. (Initial setting is "9999" (without second applied motor).
Refer
to page 179
.)
CAUTION
· 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.)
· When a surge voltage suppression filter (FR-ASF-H) is connected between the inverter and motor, output torque may decrease.
(01800 or less)
· When terminal assignment is changed using
Pr. 178 to Pr. 189 (input terminal function selection)
, the other functions may be
affected. Make setting after confirming the function of each terminal.
The motor speed fluctuation at load fluctuation can be adjusted using
Pr. 89
.
(It is useful when the speed command does not match the motor speed after
the FR-A500(L) series inverter is replaced with the FR-A700 series inverter,
etc.)
Function
RT signal ON (second motor)
RT signal OFF (first motor)
Applied motor
Pr. 450
Pr. 71
Motor capacity
Pr. 453
Pr. 80
Number of motor
poles
Pr. 454
Pr. 81
Speed control gain
Pr. 569
Pr. 89
Control method
selection
Pr. 451
Pr. 800
REMARKS
• The RT signal acts as the second function selection signal and makes the other second functions valid.
(Refer to page 226)
The RT signal is assigned to the terminal RT in the initial setting. By setting "3" in any of
Pr. 178 to Pr. 189 (input terminal function
selection)
, the RT signal can be assigned to the other terminal.
CAUTION
• Changing the terminal assignment using
Pr. 178 to Pr. 189 (input terminal function selection)
may affect the other functions. Please
make setting after confirming the function of each terminal.
♦
Parameters referred to
♦
Pr. 71, Pr. 450 Applied motor
Refer to page 179
Pr. 800, Pr. 451 Control method selection
Refer to page 87
Load torque
Speed
Содержание FR-A740-00023-EC
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