WEG CFW-11 Programming Manual page 156

Functions Common to All the Control Modes
For the V/f scalar control mode there is a "dead time" (motor rotates free), before starting the DC braking. This time
is necessary to the demagnetization of the motor and it is proportional to its speed.
During the DC braking the inverter indicates the "DCbreak" status at the keypad (HMI) top left corner.
During the braking process, if the inverter is enabled, the braking is interrupted and the inverter will operate normally
again.
atteNtioN!
The DC Braking may continue active after the motor has already stopped. Be careful with the motor
thermal sizing for short period cyclic braking.
P0301 – Dc-Braking Speed
Adjustable
Range:
Proprieties:
Access groups
via HMI:
Description:
This parameter establishes the beginning point for the DC braking application at stopping. Refer to the figures
12.10 (a) and (b).
P0302 – Dc-Braking Voltage
Adjustable
Range:
Proprieties:
Access groups
via HMI:
Description:
This parameter adjusts the DC voltage (braking torque) applied to the motor during the braking.
The adjustment must be done by increasing gradually the P0302 value, which varies from 0 to 10 % of the rated
voltage, until getting the desired braking.
This parameter works only for the V/f scalar and VVW control modes.
P0372 – Dc-Braking current for Sensorless
Adjustable
Range:
12
Proprieties:
Access groups
via HMI:
12-20
0 to 450 rpm
V/f, VVW and Sless
01 PARAMETER GROUPS
47 DC Braking
0.0 to 10.0 %
V/f and VVW
01 PARAMETER GROUPS
47 DC Braking
0.0 to 90.0 %
Sless
01 PARAMETER GROUPS
47 DC Braking
Factory 30 rpm
Setting:
Factory 2.0 %
Setting:
Factory 40.0 %
Setting: