GE AF-650 GP Programming Manual page 169

B-28 Gain Boost Factor
Range:
1.00* [1.00 - 4.00]
3
Illustration 3.5: Brake release sequence for hoist mechanical brake control
I) Activate brake delay: The frequency converter starts again from the mechanical brake engaged position.
II) Stop delay: When the time between successive starts is shorter than the setting in par. B-24 Stop Delay, the frequency converter starts without
applying the mechanical brake (e.g. reversing).
168
Function:
When a speed PID-control is connected to the output (flux closed loop) it must be possible to boost the
proportional gain of the control during the Activate Brake Delay (par. B-23 Activate Brake Delay). By in-
creasing the gain, the bump when the motor takes over the load from the brake can be reduced. The risk
of oscillation is very small due to the relatively short duration and the low (zero) speed.
AF-650 GP Programming Guide