E6581386
F-40
6
6.21 Torque limit
: Power running torque
limit selection
: Power running torque
limit level
: Regenerative braking torque
limit selection
: Regenerative braking torque
limit 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 not operate when the parameter
=
,
,
setting.
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 selection) : Set at ()
(Power running torque limit) : Set a desirable torque limit level.
[Setting of regenerative torque]
(Regenerative braking torque limit selection) : Set at ()
(Regenerative braking torque limit) : Set a desirable torque limit level.
[Parameter setting]
Title Function Adjustment range Default setting
Power running torque limit
selection
:VI/II (voltage/current input)
:RR/S4 (potentiometer/voltage input)
:RX (voltage input)
:
Power running torque limit level ~ % %:Disabled
Regenerative braking torque limit
selection
:VI/II (voltage/current input)
:RR/S4 (potentiometer/voltage input)
:RX (voltage input)
:
Regenerative braking torque limit
level
~ % %:Disabled
Constant output zone torque limit
selection
:Constant output limit
:Constant torque limit
Note:If the value set with (stall prevention level) is smaller than the torque limit, then the value set with
acts as the torque limit.
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