Toshiba Q9 Plus ASD, Installation & Operation Manual

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E6581611
F-93
6
Frequency [Hz]
Time [s]
Torque [N·m]
Time [s]
Torque limit level
Actual speed
If the torque limit function
is not activated
Operation frequency
Time [s]
Mechanical brake
ON
OFF
(released)
(2)
f451
=
1
(In sync with min. time)
The operation frequency keeps increasing, even if the torque limit function is activated.
In this control mode, the actual speed is kept in sync with the operation frequency, while torque is held at a limit
level in spite of torque decrease when releasing the mechanical brake. The use of this function prevents the load
from failing and improves the motor’s response during inching operation.
Frequency [Hz]
Torque [N·m]
Torque limit level
Mechanical brake
Time [s]
Actual speed
(Acceleration rates vary depending
on the torque limit level.)
Operation frequency
Time [s]
Time [s]
ON
OFF
(released)
Torque is held at a limit level even
after the mechanical brake is released.