Delta Electronics VFD-M - Manual (Page 64)

Chapter 4 Parameters|
Revision May 2008, ME14, SW V3.04 4-29
Pr.29 DC Braking Time during Start-up Unit: 0.1sec
Settings 0.0 to 5.0 sec Factory Setting: 0.0
This parameter determines the duration for the DC Braking Current applied during starting. DC
Braking is applied until the Minimum Frequency is reached.
Pr.30 DC Braking Time during Stopping Unit: 0.1sec
Settings 0.0 to 25.0 sec Factory Setting: 0.0
This parameter determines the duration for the DC Braking voltage to be applied during
stopping. If stopping with DC Braking is desired, then Pr.02 must be set to Ramp to Stop (0.0).
Pr.31 Start-Point for DC Braking Unit: 0.1sec
Settings 0.00 to 60.00Hz Factory Setting: 0.00
This parameter sets the frequency at which the DC Braking will begin during deceleration.
Master
Frequency
Min. output
Freq.
Pr.29
Pr.31
Pr.30
DC Braking Current %
ON
OFF
Pr.28
Start-point
for DC
braking
Operation
command
time(s)
Notes:
1. DC Braking during starting is used for loads that may move before the AC drive starts, such
as hoists and cranes. These loads may also be moving in the wrong direction. Under such
circumstances, the DC Braking can be used to hold the load in position before applying a
forward motion.
2. DC Braking during stopping is used to stop faster than the ramp-to-stop or to hold a
stopped load in position. A dynamic brake resistor may be needed in order to stop loads of
high inertia.