Torque Limit - Toshiba TOSVERT VF-PS1 Instruction Manual

6.21

Torque limit

• 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.)
6
Reverse run
With the parameter
magnetic field) from between constant output (
When you select the constant torque limit option, you should preferably select the output voltage limit option
( = ) with the parameter
Torque limits can be set with the parameters
[Setting of power running torque]
[Setting of regenerative torque]
[Parameter setting]
Title
Note:If the value set with
: Power running torque
limit selection
: Power running torque
limit level
Positive torque
Regenerative
Power
running
Negative torque
, you can select the item that is limited in the constant output zone (somewhat weak
(base frequency voltage selection).
(Power running torque limit selection)
(Power running torque limit)
(Regenerative braking torque limit selection)
(Regenerative braking torque limit)
Function
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
(stall prevention level) is smaller than the torque limit, then the value set with
acts as the torque limit.
: Regenerative braking torque
limit selection
: Regenerative braking torque
limit level
: Constant output zone torque
limit selection
Power
running
Regenerative
= : default setting) and constant torque (
and .
: Set at ( )
: Set a desirable torque limit level.
: Set at ( )
: Set a desirable torque limit level.
Adjustment range
:VI/II (voltage/current input)
:RR/S4 (potentiometer/voltage input)
:RX (voltage input)
:
~ % %:Disabled
:VI/II (voltage/current input)
:RR/S4 (potentiometer/voltage input)
:RX (voltage input)
:
~ % %:Disabled
： Constant output limit
： Constant torque limit
F-40
E6581531
+250% torque
: =
: =
Forward run
-250% torque
= ).
Default setting
%
%