GE AF-650 GP Programming Manual page 150

Parameter Descriptions
B-20 Release Brake Current
Range: Function:
par. [0 - par. Set the motor current for release of the
DR-37 DR-37 A] mechanical braking when a start condition is
A present. The default value is the maximum
*
current the inverter can provide for the
particular power size. The upper limit is
specified in parameter DR-37 Drive Max.
Current.
NOTICE
When mechanical brake control
output is selected, but no mechanical
braking is connected, the function
does not work by default setting due
to too low motor current.
B-21 Activate Brake Speed [RPM]
Range: Function:
300 [0 - par. Set the motor speed for activation of the
RPM H-73 RPM] mechanical brake, when a stop condition
*
is present. The upper speed limit is
specified in parameter H-73 Warning Speed
High.
B-22 Activate Brake Speed [Hz]
Range: Function:
0 Hz [0 - 5000.0 Hz] Set the motor frequency for activation of
*
the mechanical brake, when a stop
condition is present.
B-23 Activate Brake Delay
Range: Function:
0 s [0 - Enter the brake delay time of the coast after decel
*
5 s] time. The shaft is held at zero speed with full
holding torque. Ensure that the mechanical braking
has locked the load before the motor enters coast
mode.
To adjust transition of the load to the mechanical
braking, set parameter B-23 Activate Brake Delay and
parameter B-24 Stop Delay.
Setting of brake delay parameters does not affect
the torque. The frequency converter does not
register that mechanical braking is holding the load.
DET-618D
AF-650 GP™ Programming Guide
B-23 Activate Brake Delay
Range:
B-24 Stop Delay
Range:
0 s [0 - 5 s] Set the time interval from the moment when the
*
B-25 Brake Release Time
Range:
0.20 s
*
B-26 Torque Ref
Range:
0 %
*
B-27 Torque Ramp Time
Range:
0.2 s
*
B-28 Gain Boost Factor
Range:
1 [0 -
*
4]
02/2016 All rights reserved.
Function:
After setting parameter B-23 Activate Brake Delay, the
torque drops to 0 after a few minutes. The sudden
torque change leads to movement and noise.
Function:
motor is stopped until the brake closes. This
parameter is a part of the stopping function.
Function:
[0 - 5 s] This value defines the time it takes for the
mechanical brake to open/ close. This
parameter must act as a time-out when brake
feedback is activated.
Function:
[-300 - 300 %] The value defines the torque applied
against the closed mechanical brake,
before release
Function:
[0 - 5 s] The value defines the duration of the torque
ramp in clockwise direction.
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 (parameter B-23 Activate Brake Delay). By
increasing 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.
3 3
149