ADV200-HC Manual
Page 18 of 55
26.06 HOIST SPEED UP & POWER SPEED UP
When the load to be hoisted is less than a settable value, this function lets you shorten hoisting times by
letting the motor reach a speed higher than its nominal value.
The maximum reachable speed is a function of the load applied to the motor compared to its nominal load
and of the typical torque curve of the motor used.
Approximately, if the load is less than 50% of nominal, the maximum reachable speed is about twice the
nominal value. For a more precise value, contact the motor manufacturer and the hoisting machine designer.
The
“
Speed Up Selector
”
parameter lets you choose 2 different ways to manage motor overspeed: Hoist
Speed Up or Power Speed Up
Hoist Speed Up
If Hoist Speed Up mode is chosen, when “Spd up test speed” is reached, the speed is temporarily held constant
and a test is run to check if the current absorbed by the motor (drive configured in V/F mode) or the torque
delivered by the motor (drive configured in Flux Vector Close Loop or Flux Vector Open Loop mode) is below
the “Spd up FWD(REV) thr” threshold.
The test period is divided into 2 phases: for 1/3 of the time, “Spd up Test time” does not perform any
measurement so that the torque (current) can stabilize; for the next 2/3 of the time, torque (current) is
monitored. If it stays below the “Spd up FWD(REV) trq thr” threshold, the speed reference goes to “Spd up
FWD(REV) speed”, otherwise the speed reference is as defined on the “CMD SPEED” menu.
After the test is run, if results are positive, whenever a speed reference higher than “Spd up test speed” is
commanded, the speed reference will go to “Spd up FWD(REV) speed.”
The HOIST SPEED UP condition is reset only after a brake close or a direction reverse.
Note: If you use –ELS (electric shaft) configuration
):
The thresholds are set in % only on the drive defined as “virtual master” …–ELS-VM. The “virtual master”
receives the load %s of each shaft from the slaves.
The action if the threshold is exceeded must be specified only on drive …–ELS-VM.
Function ON state will be shown on the monitor on drive …-ELS-VM
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