Toshiba VF-PS1 - Torque Limit

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.
Q 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.