INVT Goodrive350-19 Series Operation Manual page 24

Goodrive350-19 Series VFD for Crane
Function description
Conical motor
Light load speed
Zero servo
Anti-sway for
horizontal moving
Tower crane
slewing without
using an eddy
current controller
Loose rope
protection (only in
closed-loop
Upward or
downward
position limit
Upward or
downward DEC
During startup, the magnetic flow is increased to release the
brake. During stop, the magnetic flow is decreased to close the
control
brake.
In closed-loop mode, the speed can be boosted and limited at
constant power status, and the speed is limited in stepped way.
In open-loop mode, if the simplified speed boost way is used, the
boost speed boosts to the set frequency in light load status; if the
speed is boosted or limited in constant power status, the speed is
limited in stepped way
In closed-loop mode, if the VFD detects load downward slip, the
VFD automatically enters the zero servo state and outputs a
brake failure alarm. When a level-2 fault occurs, if load
downward slip occurs, the VFD automatically resets the fault,
enters the zero servo state, and outputs a brake failure alarm.
By selecting different anti-sway modes, it can effectively
eliminate the load swing caused by the acceleration and
deceleration of the parallel traveling mechanism in different
scenarios such as with rope length, without rope length, speed,
and position control scenarios.
Embedded curves for tower crane slewing without using an eddy
current controller and anti-sway adaptation technology help to
adjust the variable frequency ACC in real time so that the slewing
mechanism runs steadily and responds quickly; even in the
windy environment, it can eliminate the problem that the
mechanism is easy to slide in the downwind is easy to slide and it
cannot reach the given speed in the upwind.
If the loose rope state is detected during the hook runs down, the
VFD reports a fault or alarm. This eliminates the safety hazards
caused by hanging or squatting in operation.
mode)
The function is used to limit the crane to run within the specified
range. The VFD enables emergency stop and reports an alarm
once the range is exceeded.
When the deceleration signal is valid, the running speed of the
crane is limited once the crane runs within the slow speed area.
The function also features uni-directional speed limit. For
position
example, only the upward running speed is limited when the
crane runs within the upward slow speed area.
Specifications
-12-
Product overview