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E6581528
F-41
6
6.25 Torque limit
6.25.1 Torque limit switching
: Power running torque limit 1
selection
: Power running torque limit 1
level
: Regenerative braking torque
limit 1 selection
: Regenerative braking torque
limit 1 level
: Power running torque limit 2
level
: Regenerative braking torque
limit 2 level
: Power running torque limit 3
level
: Regenerative braking torque
limit 3 level
: Power running torque limit 4
level
: Regenerative braking torque
limit 4 level
: Constant output zone torque
limit selection
• Function
This function is to decrease or increase the output frequency according to the loading condition when the
motor torque reaches the limit level. Setting a torque limit parameter at 250% means “Invalid.”
With this function, you can also select from between limiting the constant output or limiting the constant
torque in the constant output zone. This function is available for Pt=2,3,4,7 and 8.
Setting methods
(1) When setting limits to torque, use internal parameters (Torque limits can also be set with an external control
device.)
+250% torque
-250% torque
Power
running
Regenerative
Forward run
Regenerative
Power
running
Positive torque
Negative torque
Reverse run
:
=
: =
With the parameter , you can select the item that is limited in the constant output zone (somewhat weak
magnetic field) from between constant output (=: default setting) and constant torque (=).
When you select the constant torque limit option, you should preferably select the output voltage limit option
(=) with the parameter (base frequency voltage selection).
Torque limits can be set with the parameters and .
[Setting of power running torque]
(Power running torque limit 1 selection) : Set at ()
(Power running torque limit 1) : Set a desirable torque limit level.
[Setting of regenerative torque]
(Regenerative braking torque limit 1 selection) : Set at ()
(Regenerative braking torque limit 1) : Set a desirable torque limit level.